learn02

2024-12-07 19:53:28 +08:00 · 2024-12-07 19:53:28 +08:00 · 63b67ae57f
commit 63b67ae57f
parent 5425534b38
59 changed files with 2281 additions and 27 deletions
--- a/.idea/artifacts/learn02_war_exploded.xml
+++ b/.idea/artifacts/learn02_war_exploded.xml
@ -2,12 +2,19 @@
  <artifact type="exploded-war" name="learn02:war exploded">
    <output-path>$PROJECT_DIR$/out/artifacts/learn02_war_exploded</output-path>
    <root id="root">
-      <element id="javaee-facet-resources" facet="learn02/web/Web" />
      <element id="directory" name="WEB-INF">
        <element id="directory" name="classes">
          <element id="module-output" name="learn02" />
        </element>
+        <element id="directory" name="lib">
+          <element id="library" level="project" name="mysql-connector" />
+          <element id="library" level="project" name="sqlite-jdbc-3.47.0.0" />
+          <element id="library" level="project" name="commons-pool2-2.9.0" />
+          <element id="library" level="project" name="commons-logging-1.3.4" />
+          <element id="library" level="project" name="commons-dbcp2-2.9.0" />
        </element>
+      </element>
+      <element id="javaee-facet-resources" facet="learn02/web/Web" />
    </root>
  </artifact>
 </component>
--- a/.idea/artifacts/learn02_war_exploded2.xml
+++ b/.idea/artifacts/learn02_war_exploded2.xml
@ -1,20 +0,0 @@
-<component name="ArtifactManager">
-  <artifact type="exploded-war" name="learn02:war exploded2">
-    <output-path>$PROJECT_DIR$/out/artifacts/learn02_war_exploded2</output-path>
-    <root id="root">
-      <element id="directory" name="WEB-INF">
-        <element id="directory" name="classes">
-          <element id="module-output" name="learn02" />
-        </element>
-        <element id="directory" name="lib">
-          <element id="library" level="project" name="mysql-connector" />
-          <element id="library" level="project" name="sqlite-jdbc-3.47.0.0" />
-          <element id="library" level="project" name="commons-pool2-2.9.0" />
-          <element id="library" level="project" name="commons-logging-1.3.4" />
-          <element id="library" level="project" name="commons-dbcp2-2.9.0" />
-        </element>
-      </element>
-      <element id="javaee-facet-resources" facet="learn02/web/Web" />
-    </root>
-  </artifact>
-</component>
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@ -3,6 +3,14 @@
  <component name="CompilerConfiguration">
    <annotationProcessing>
      <profile default="true" name="Default" enabled="true" />
+      <profile name="Maven default annotation processors profile" enabled="true">
+        <sourceOutputDir name="target/generated-sources/annotations" />
+        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
+        <outputRelativeToContentRoot value="true" />
+      </profile>
    </annotationProcessing>
+    <bytecodeTargetLevel target="21">
+      <module name="learn03" target="21" />
+    </bytecodeTargetLevel>
  </component>
 </project>
--- a/.idea/encodings.xml
+++ b/.idea/encodings.xml
@ -2,6 +2,10 @@
 <project version="4">
  <component name="Encoding" defaultCharsetForPropertiesFiles="GBK">
    <file url="file://$PROJECT_DIR$/.gitignore" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/learn02/web/js/course-edit.js" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/learn02/web/js/index.js" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/learn03/src/main/java" charset="GBK" />
+    <file url="file://$PROJECT_DIR$/learn03/src/main/resources" charset="GBK" />
    <file url="file://$PROJECT_DIR$/learn1/web/js/course-edit.js" charset="UTF-8" />
    <file url="file://$PROJECT_DIR$/learn1/web/js/index.js" charset="UTF-8" />
    <file url="PROJECT" charset="GBK" />
--- a/.idea/inspectionProfiles/Project_Default.xml
+++ b/.idea/inspectionProfiles/Project_Default.xml
@ -4,6 +4,16 @@
    <inspection_tool class="AutoCloseableResource" enabled="true" level="WARNING" enabled_by_default="true">
      <option name="METHOD_MATCHER_CONFIG" value="java.util.Formatter,format,java.io.Writer,append,com.google.common.base.Preconditions,checkNotNull,org.hibernate.Session,close,java.io.PrintWriter,printf,java.io.PrintStream,printf,java.sql.Connection,prepareStatement,java.lang.ClassLoader,getResourceAsStream,org.apache.commons.dbcp2.BasicDataSourceFactory,createDataSource" />
    </inspection_tool>
+    <inspection_tool class="HtmlUnknownAttribute" enabled="true" level="WARNING" enabled_by_default="true">
+      <option name="myValues">
+        <value>
+          <list size="1">
+            <item index="0" class="java.lang.String" itemvalue="v-model" />
+          </list>
+        </value>
+      </option>
+      <option name="myCustomValuesEnabled" value="true" />
+    </inspection_tool>
    <inspection_tool class="ThrowablePrintStackTrace" enabled="false" level="WARNING" enabled_by_default="false" />
  </profile>
 </component>
--- a/.idea/jarRepositories.xml
+++ b/.idea/jarRepositories.xml
@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Central Repository" />
+      <option name="url" value="http://maven.aliyun.com/nexus/content/groups/public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+  </component>
+</project>
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@ -1,5 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/learn03/pom.xml" />
+        <option value="$PROJECT_DIR$/learn03-springboot/pom.xml" />
+      </list>
+    </option>
+    <option name="ignoredFiles">
+      <set>
+        <option value="$PROJECT_DIR$/learn03/pom.xml" />
+      </set>
+    </option>
+  </component>
  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="temurin-21" project-jdk-type="JavaSDK">
    <output url="file://$PROJECT_DIR$/out" />
  </component>
--- a/learn02/learn02.iml
+++ b/learn02/learn02.iml
@ -19,5 +19,12 @@
    </content>
    <orderEntry type="inheritedJdk" />
    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="commons-dbcp2-2.9.0" level="project" />
+    <orderEntry type="library" name="commons-logging-1.3.4" level="project" />
+    <orderEntry type="library" name="commons-pool2-2.9.0" level="project" />
+    <orderEntry type="library" name="mysql-connector" level="project" />
+    <orderEntry type="library" name="sqlite-jdbc-3.47.0.0" level="project" />
+    <orderEntry type="library" name="lombok" level="project" />
+    <orderEntry type="library" name="Tomcat 10.1.31" level="application_server_libraries" />
  </component>
 </module>
--- a/learn02/src/common/DBTool.java
+++ b/learn02/src/common/DBTool.java
@ -0,0 +1,84 @@
+package common;
+
+import org.apache.commons.dbcp2.BasicDataSourceFactory;
+
+import javax.sql.DataSource;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.Properties;
+
+
+/**
+ * 这是一个数据库工具类，创建了一个数据库连接池
+ * 需要在database.properties中配置数据库连接属性
+ * @author Awin-x
+ */
+public class DBTool {
+    static DataSource ds;
+    static{
+        Properties prop = new Properties();
+        try {
+            InputStream database_info = DBTool.class.getClassLoader().getResourceAsStream("database.properties");
+            if (database_info != null) {
+                prop.load(new InputStreamReader(database_info, "GBK"));
+                prop.list(System.out);
+            }else{
+                throw new FileNotFoundException("database.properties file does not exist in the classpath");
+            }
+        } catch (IOException e) {
+            System.out.println("数据库配置加载失败！");
+            throw new RuntimeException(e);
+        }
+        try {
+            ds = BasicDataSourceFactory.createDataSource(prop);
+        } catch (Exception e) {
+            System.out.println("数据库连接池初始化失败");
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static Connection getConnection(){
+        try{
+            return ds.getConnection();
+        } catch (SQLException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    public static PreparedStatement getPreparedStatement(String sql) throws SQLException{
+        //noinspection SqlSourceToSinkFlow
+        return ds.getConnection().prepareStatement(sql);
+    }
+
+    public static void close(Connection conn, PreparedStatement ps, ResultSet rs){
+        try{
+            if(rs != null){
+                rs.close();
+            }
+            if(ps != null){
+                ps.close();
+            }
+            if(conn != null){
+                conn.close();
+            }
+        } catch (SQLException e) {
+            System.out.println("关闭失败");
+            e.printStackTrace();
+        }
+    }
+
+    public static void close(PreparedStatement ps, ResultSet rs) throws SQLException {
+        close(ps.getConnection(), ps, rs);
+    }
+
+    public static void close(PreparedStatement ps) throws SQLException {
+        close(ps.getConnection(), ps, null);
+    }
+}
--- a/learn02/src/controller/BaseController.java
+++ b/learn02/src/controller/BaseController.java
@ -0,0 +1,25 @@
+package controller;
+
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+public class BaseController extends HttpServlet {
+    protected void service(HttpServletRequest req, HttpServletResponse resp){
+        resp.addHeader(  "Access-Control-Allow-Origin","*");
+        String uri = req.getRequestURI();
+
+        uri = uri.substring(uri.lastIndexOf("/")+1);
+        //使用反射获取方法来执行
+        try {
+            Method method = this.getClass().getDeclaredMethod(uri, HttpServletRequest.class, HttpServletResponse.class);
+            method.setAccessible(true);
+            method.invoke(this, req, resp);
+        } catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}
--- a/learn02/src/controller/CourseController.java
+++ b/learn02/src/controller/CourseController.java
@ -0,0 +1,106 @@
+package controller;
+
+import dao.impl.CourseDBImpl;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import pojo.CourseInfo;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.ArrayList;
+
+@WebServlet("/courseAction/*")
+public class CourseController extends BaseController {
+    private void list(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+        resp.setContentType("application/json;charset=UTF-8");
+        PrintWriter out = resp.getWriter();
+        int page = req.getParameter("page") == null ? 1 : Integer.parseInt(req.getParameter("page"));
+        int pageSize = req.getParameter("pageSize") == null ? 10 : Integer.parseInt(req.getParameter("pageSize"));
+        String keyword = req.getParameter("keyword");
+        int courseType = req.getParameter("courseType").isEmpty() ? 0 : Integer.parseInt(req.getParameter("courseType"));
+        ArrayList<CourseInfo> course_list = new CourseDBImpl().getCourseInfos(page, pageSize, keyword, courseType);
+        StringBuilder data = new StringBuilder();
+        for (CourseInfo course : course_list) {
+            data.append(course.toJSON()).append(",");
+        }
+        if (!data.isEmpty()) {
+            data.setLength(data.length() - 1);
+        }
+        String json = "{\"total\":" + new CourseDBImpl().getAllCourseInfoCount(keyword, courseType) +
+                ",\"data\":[" +
+                data +
+                "],\"page\":" +
+                page +
+                ",\"pageSize\":" +
+                pageSize +
+                ",\"success\":true}";
+        out.print(json);
+    }
+
+    private void update(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+        resp.setContentType("application/json;charset=UTF-8");
+        PrintWriter out = resp.getWriter();
+        if (req.getParameter("id") == null) {
+            out.println("{\"success\":false}\"}");
+            return;
+        }
+        int id = Integer.parseInt(req.getParameter("id"));
+        CourseInfo course = new CourseDBImpl().getCourseInfoByID(id);
+        if (course == null) {
+            out.println("{\"success\":false}\"}");
+            return;
+        }
+        String name = req.getParameter("name");
+        int type = Integer.parseInt(req.getParameter("type"));
+        float credit = Float.parseFloat(req.getParameter("credit"));
+        int grade = Integer.parseInt(req.getParameter("grade"));
+        int major = Integer.parseInt(req.getParameter("major"));
+        String detail = req.getParameter("detail");
+        course.setName(name);
+        course.setType(type);
+        course.setCredit(credit);
+        course.setGrade(grade);
+        course.setMajor(major);
+        course.setDetail(detail);
+
+        if (new CourseDBImpl().updateCourseInfo(course) >= 1) {
+            out.println("{\"success\":true}");
+        } else {
+            out.println("{\"success\":false}");
+        }
+    }
+
+    private void delete(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+        int id = Integer.parseInt(req.getParameter("id"));
+        resp.setContentType("application/json;charset=UTF-8");
+        PrintWriter out = resp.getWriter();
+        if (new CourseDBImpl().deleteCourseInfo(id) >= 1) {
+            out.print("{\"success\": true}");
+        } else {
+            out.print("{\"success\": false}");
+        }
+    }
+
+    private void add(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+        resp.setContentType("application/json;charset=UTF-8");
+        PrintWriter out = resp.getWriter();
+        if (req.getParameter("id") == null) {
+            out.println("{\"success\":false}\"}");
+            return;
+        }
+        int id = Integer.parseInt(req.getParameter("id"));
+        CourseInfo course = new CourseInfo();
+        course.setName(req.getParameter("name"));
+        course.setType(Integer.parseInt(req.getParameter("type")));
+        course.setCredit(Float.parseFloat(req.getParameter("credit")));
+        course.setGrade(Integer.parseInt(req.getParameter("grade")));
+        course.setMajor(Integer.parseInt(req.getParameter("major")));
+        course.setDetail(req.getParameter("detail"));
+        if (new CourseDBImpl().addCourseInfo(course) >= 1) {
+            out.println("{\"success\": true}");
+        }else{
+            out.println("{\"success\": false}");
+        }
+    }
+}
--- a/learn02/src/controller/ScoreController.java
+++ b/learn02/src/controller/ScoreController.java
@ -0,0 +1,13 @@
+package controller;
+
+import jakarta.servlet.ServletException;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+import java.io.IOException;
+
+@WebServlet("/scoreAction/*")
+public class ScoreController extends BaseController {
+}
--- a/learn02/src/controller/StudentController.java
+++ b/learn02/src/controller/StudentController.java
@ -0,0 +1,22 @@
+package controller;
+
+import dao.TeacherDB;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import pojo.TeacherInfo;
+
+import java.util.ArrayList;
+
+@WebServlet("/studentAction/*")
+public class StudentController extends BaseController {
+    private void list(HttpServletRequest req, HttpServletResponse resp) {
+        String path = req.getContextPath();
+        if (req.getSession().getAttribute("user") == null){
+            resp.setStatus(403);
+            return;
+        }
+        ArrayList<TeacherInfo> teachers;
+    }
+}
--- a/learn02/src/controller/TeacherController.java
+++ b/learn02/src/controller/TeacherController.java
@ -0,0 +1,12 @@
+package controller;
+
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+import java.lang.reflect.InvocationTargetException;
+
+@WebServlet("/teacherAction/*")
+public class TeacherController extends BaseController {
+}
--- a/learn02/src/controller/UserController.java
+++ b/learn02/src/controller/UserController.java
@ -0,0 +1,43 @@
+package controller;
+
+import dao.impl.UserDBImpl;
+import jakarta.servlet.annotation.WebServlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import pojo.UserInfo;
+
+import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+
+@WebServlet("/userAction/*")
+public class UserController extends BaseController {
+    protected void login(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+        System.out.println("µÇÂ¼");
+        String path = req.getContextPath();
+        if (req.getSession().getAttribute("user") != null){
+            resp.sendRedirect(path+"/home.jsp");
+        }
+        String username = req.getParameter("username");
+        String password = req.getParameter("password");
+        UserInfo user = new UserDBImpl().getUserByName(username);
+        if(user == null) {
+            resp.sendRedirect(path+"/login/login.jsp&loginflag=1");
+        }else if (user.getPass().equals(password)) {
+            req.getSession().setAttribute("user", user);
+            resp.sendRedirect(path+"/home.jsp");
+        }else{
+            resp.sendRedirect(path+"/login/login.jsp&loginflag=2");
+        }
+    }
+    protected void logout(HttpServletRequest req, HttpServletResponse resp) throws IOException {
+        System.out.println("×¢Ïú");
+        String username = req.getParameter("username");
+        UserInfo user = (UserInfo)req.getSession().getAttribute("user");
+        if(user != null) {
+            req.getSession().removeAttribute("user");
+        }
+        String path = req.getContextPath();
+        resp.sendRedirect(path+"/login/login.jsp");
+    }
+}
--- a/learn02/src/dao/CourseDB.java
+++ b/learn02/src/dao/CourseDB.java
@ -0,0 +1,65 @@
+package dao;
+
+import pojo.CourseInfo;
+
+import java.util.ArrayList;
+
+public interface CourseDB {
+    /**
+     * 用于列出全部课程
+     * @return 返回从数据库中查询到的全部课程
+     */
+    ArrayList<CourseInfo> getAllCourseInfo();
+
+    /**
+     * 用于分页列出筛选课程
+     * @param page 页码
+     * @param pageSize 每页条数
+     * @param keyword 关键词筛选，为空字符串表示不筛选
+     * @param type 类型筛选，为0表示不筛选
+     * @return 返回从数据库查询到的该页课程
+     */
+    ArrayList<CourseInfo> getCourseInfos(int page, int pageSize, String keyword, int type);
+
+    /**
+     * 用于获取一个课程
+     * @param id 目标课程的id
+     * @return 根据id从数据库查询到的课程信息
+     */
+    CourseInfo getCourseInfoByID(int id);
+
+    /**
+     * 用于获取课程总数
+     * @return 返回数据库中课程信息条数
+     */
+    int getAllCourseInfoCount();
+
+    /**
+     * 获取一个课程筛选结果集的总数
+     * @param keyword 关键词筛选，为空字符串表示不筛选
+     * @param type 类型筛选，为0表示不筛选
+     * @return 课程筛选结果集的总数
+     */
+    int getAllCourseInfoCount(String keyword, int type);
+
+    /**
+     * 用于添加课程
+     * @param courseInfo 要添加的课程
+     * @return 影响数据库行数，行数大于0则说明添加成功
+     */
+    int addCourseInfo(CourseInfo courseInfo);
+
+    /**
+     * 用于更新一个课程信息
+     * @param courseInfo 修改的课程信息，id不可修改，id作为修改目标查找参数
+     * @return 影响的行数，行数大于0则说明更新成功
+     */
+    int updateCourseInfo(CourseInfo courseInfo);
+
+    /**
+     * 用于删除一个课程
+     * @param id 要删除的课程的id
+     * @return 影响的行数，行数大于0则说明更新成功
+     */
+    int deleteCourseInfo(int id);
+}
--- a/learn02/src/dao/ScoreDB.java
+++ b/learn02/src/dao/ScoreDB.java
@ -0,0 +1,15 @@
+package dao;
+
+import pojo.ScoreInfo;
+
+import java.util.ArrayList;
+
+public interface ScoreDB {
+    ScoreInfo getScoreInfoByID(int studentID, int courseID);
+    ArrayList<ScoreInfo> getScoreInfoByStudentID(int studentID);
+    ArrayList<ScoreInfo> getScoreInfoByCourseID(int courseID);
+    int getScoreByStudentID(int studentID);
+    int addScoreInfo(ScoreInfo scoreInfo);
+    int updateScoreInfo(ScoreInfo scoreInfo);
+    int deleteScoreInfo(int studentID, int courseID);
+}
--- a/learn02/src/dao/StudentDB.java
+++ b/learn02/src/dao/StudentDB.java
@ -0,0 +1,15 @@
+package dao;
+
+import pojo.StudentInfo;
+
+import java.util.ArrayList;
+
+public interface StudentDB {
+    ArrayList<StudentInfo> getAllStudentInfo();
+    StudentInfo getStudentInfoByID(int id);
+    StudentInfo getStudentInfoByName(String name);
+    StudentInfo getStudentInfoByCode(String code);
+    int addStudentInfo(StudentInfo studentInfo);
+    int updateStudentInfo(StudentInfo studentInfo);
+    int deleteStudentInfo(int id);
+}
--- a/learn02/src/dao/TeacherDB.java
+++ b/learn02/src/dao/TeacherDB.java
@ -0,0 +1,14 @@
+package dao;
+
+import pojo.TeacherInfo;
+
+import java.util.ArrayList;
+
+public interface TeacherDB {
+    ArrayList<TeacherInfo> getAllTeacherInfo();
+    TeacherInfo getTeacherInfoByID(int id);
+    TeacherInfo getTeacherInfoByName(String name);
+    int addTeacherInfo(TeacherInfo teacherInfo);
+    int updateTeacherInfo(TeacherInfo teacherInfo);
+    int deleteTeacherInfo(int id);
+}
--- a/learn02/src/dao/UserDB.java
+++ b/learn02/src/dao/UserDB.java
@ -0,0 +1,11 @@
+package dao;
+
+import pojo.UserInfo;
+
+public interface UserDB {
+    UserInfo getUserByName(String username);
+    UserInfo getUserById(int id);
+    int addUser(UserInfo user);
+    int updateUser(UserInfo user);
+    int deleteUser(int id);
+}
--- a/learn02/src/dao/impl/CourseDBImpl.java
+++ b/learn02/src/dao/impl/CourseDBImpl.java
@ -0,0 +1,177 @@
+package dao.impl;
+
+import common.DBTool;
+import dao.CourseDB;
+import pojo.CourseInfo;
+
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+
+public class CourseDBImpl implements CourseDB {
+
+    private CourseInfo fillCourseInfo(ResultSet rs) throws SQLException {
+        CourseInfo courseInfo = new CourseInfo();
+        courseInfo.setId(rs.getInt("N_COURSE_ID"));
+        courseInfo.setName(rs.getString("VC_COURSE_NAME"));
+        courseInfo.setType(rs.getInt("N_TYPE"));
+        courseInfo.setCredit(rs.getFloat("F_CREDIT"));
+        courseInfo.setGrade(rs.getInt("N_GRADE"));
+        courseInfo.setMajor(rs.getInt("N_MAJOR"));
+        courseInfo.setDetail(rs.getString("VC_DETAIL"));
+        return courseInfo;
+    }
+
+    @Override
+    public ArrayList<CourseInfo> getAllCourseInfo() {
+        ArrayList<CourseInfo> courseList = new ArrayList<>();
+        try {
+            PreparedStatement ps = DBTool.getPreparedStatement("SELECT * FROM t_course");
+            ResultSet rs = ps.executeQuery();
+            while (rs.next()) {
+                courseList.add(fillCourseInfo(rs));
+            }
+            DBTool.close(ps, rs);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return courseList;
+    }
+
+    @Override
+    public ArrayList<CourseInfo> getCourseInfos(int page, int pageSize, String keyword, int type) {
+        ArrayList<CourseInfo> courseList = new ArrayList<>();
+        String sql = "SELECT * FROM t_course WHERE UPPER(VC_COURSE_NAME) LIKE ? AND ? IN (N_TYPE, 0) ORDER BY N_COURSE_ID LIMIT ?, ?";
+        try {
+            PreparedStatement ps = DBTool.getPreparedStatement(sql);
+            ps.setString(1, "%"+keyword.toUpperCase()+"%");
+            ps.setInt(2, type);
+            ps.setInt(3, (page - 1) * pageSize);
+            ps.setInt(4, pageSize);
+            ResultSet rs = ps.executeQuery();
+            while (rs.next()) {
+                courseList.add(fillCourseInfo(rs));
+            }
+            DBTool.close(ps, rs);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return courseList;
+    }
+
+    @Override
+    public CourseInfo getCourseInfoByID(int id) {
+        CourseInfo courseInfo = null;
+        try {
+            PreparedStatement ps = DBTool.getPreparedStatement("select * from t_course WHERE N_COURSE_ID = ?");
+            ps.setInt(1, id);
+            ResultSet rs = ps.executeQuery();
+            while (rs.next()) {
+                String name = rs.getString("VC_COURSE_NAME");
+                int type = rs.getInt("N_TYPE");
+                float credits = rs.getFloat("F_CREDIT");
+                int grade = rs.getInt("N_GRADE");
+                int major = rs.getInt("N_MAJOR");
+                String detail = rs.getString("VC_DETAIL");
+                courseInfo = new CourseInfo(id, name, type, credits, grade, major, detail);
+            }
+            DBTool.close(ps, rs);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return courseInfo;
+    }
+
+    @Override
+    public int getAllCourseInfoCount() {
+        int count = 0;
+        String sql = "SELECT COUNT(*) FROM t_course";
+        try {
+            PreparedStatement ps = DBTool.getPreparedStatement(sql);
+            ResultSet rs = ps.executeQuery();
+            if (rs.next()) {
+                count = rs.getInt(1);
+            }
+            DBTool.close(ps, rs);
+        } catch (SQLException e) {
+            return -1;
+        }
+        return count;
+    }
+
+    @Override
+    public int getAllCourseInfoCount(String keyword, int type) {
+        int count = 0;
+        String sql = "SELECT COUNT(*) FROM t_course WHERE UPPER(VC_COURSE_NAME) LIKE ? AND ? IN (N_TYPE, 0)";
+        try {
+            PreparedStatement ps = DBTool.getPreparedStatement(sql);
+            ps.setString(1, "%"+keyword.toUpperCase()+"%");
+            ps.setInt(2, type);
+            ResultSet rs = ps.executeQuery();
+            if (rs.next()) {
+                count = rs.getInt(1);
+            }
+            DBTool.close(ps, rs);
+        } catch (SQLException e) {
+            return -1;
+        }
+        return count;
+    }
+
+    @Override
+    public int addCourseInfo(CourseInfo courseInfo) {
+        int lines;
+        try {
+            String sql = "INSERT INTO t_course (VC_COURSE_NAME, N_TYPE, F_CREDIT, N_GRADE, N_MAJOR, VC_DETAIL) VALUES(?, ?, ?, ?, ?, ?)";
+            PreparedStatement ps = DBTool.getPreparedStatement(sql);
+            ps.setString(1, courseInfo.getName());
+            ps.setInt(2, courseInfo.getType());
+            ps.setFloat(3, courseInfo.getCredit());
+            ps.setInt(4, courseInfo.getGrade());
+            ps.setInt(5, courseInfo.getMajor());
+            ps.setString(6, courseInfo.getDetail());
+            lines = ps.executeUpdate();
+            DBTool.close(ps);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return lines;
+    }
+
+    @Override
+    public int updateCourseInfo(CourseInfo courseInfo) {
+        int lines;
+        try {
+            PreparedStatement ps = DBTool.getPreparedStatement("UPDATE t_course SET VC_COURSE_NAME = ?," +
+                    " N_TYPE = ?, F_CREDIT = ?, N_GRADE = ?, N_MAJOR = ?, VC_DETAIL = ? WHERE N_COURSE_ID = ?");
+            ps.setString(1, courseInfo.getName());
+            ps.setInt(2, courseInfo.getType());
+            ps.setFloat(3, courseInfo.getCredit());
+            ps.setInt(4, courseInfo.getGrade());
+            ps.setInt(5, courseInfo.getMajor());
+            ps.setString(6, courseInfo.getDetail());
+            ps.setInt(7, courseInfo.getId());
+            lines = ps.executeUpdate();
+            DBTool.close(ps);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return lines;
+    }
+
+    @Override
+    public int deleteCourseInfo(int id) {
+        int lines;
+        try {
+            String sql = "DELETE FROM t_course WHERE N_COURSE_ID = ?";
+            PreparedStatement ps = DBTool.getPreparedStatement(sql);
+            ps.setInt(1, id);
+            lines = ps.executeUpdate();
+            DBTool.close(ps);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return lines;
+    }
+}
--- a/learn02/src/dao/impl/TeacherDBImpl.java
+++ b/learn02/src/dao/impl/TeacherDBImpl.java
@ -0,0 +1,60 @@
+package dao.impl;
+
+import common.DBTool;
+import dao.TeacherDB;
+import pojo.TeacherInfo;
+
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+
+public class TeacherDBImpl implements TeacherDB {
+    @Override
+    public ArrayList<TeacherInfo> getAllTeacherInfo() {
+        ArrayList<TeacherInfo> teacherInfos = new ArrayList<>();
+        String sql = "select * from t_teacher";
+        try{
+            PreparedStatement ps = DBTool.getPreparedStatement(sql);
+            ResultSet rs = ps.executeQuery();
+            while(rs.next()){
+                TeacherInfo teacherInfo = new TeacherInfo();
+                teacherInfo.setId(rs.getInt("N_TEACHER_ID"));
+                teacherInfo.setName(rs.getString("VC_TEACHER_NAME"));
+                teacherInfo.setSex(rs.getInt("N_SEX"));
+                teacherInfo.setBrith(rs.getString("VC_BIRTH"));
+                teacherInfo.setEduc(rs.getInt("N_EDUC"));
+                teacherInfo.setTitle(rs.getInt("N_TITLE"));
+                teacherInfos.add(teacherInfo);
+            }
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return teacherInfos;
+    }
+
+    @Override
+    public TeacherInfo getTeacherInfoByID(int id) {
+        return null;
+    }
+
+    @Override
+    public TeacherInfo getTeacherInfoByName(String name) {
+        return null;
+    }
+
+    @Override
+    public int addTeacherInfo(TeacherInfo teacherInfo) {
+        return 0;
+    }
+
+    @Override
+    public int updateTeacherInfo(TeacherInfo teacherInfo) {
+        return 0;
+    }
+
+    @Override
+    public int deleteTeacherInfo(int id) {
+        return 0;
+    }
+}
--- a/learn02/src/dao/impl/UserDBImpl.java
+++ b/learn02/src/dao/impl/UserDBImpl.java
@ -0,0 +1,103 @@
+package dao.impl;
+
+import common.DBTool;
+import dao.UserDB;
+import pojo.UserInfo;
+
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public class UserDBImpl implements UserDB {
+
+    @Override
+    public UserInfo getUserByName(String username) {
+        UserInfo u = new UserInfo();
+        ResultSet rs = null;
+        try{
+            String sql = "select * from t_user where VC_LOGIN_NAME = ?";
+            PreparedStatement ps = DBTool.getPreparedStatement(sql);
+            ps.setString(1, username);
+            rs = ps.executeQuery();
+            if(rs.next()) {
+                u.setId(rs.getInt("N_USER_ID"));
+                u.setName(rs.getString("VC_LOGIN_NAME"));
+                u.setPass(rs.getString("VC_PASSWORD"));
+            }else{
+                u = null;
+            }
+            DBTool.close(ps, rs);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return u;
+    }
+
+    @Override
+    public UserInfo getUserById(int id) {
+        UserInfo u = new UserInfo();
+        ResultSet rs = null;
+        try{
+            String sql = "select * from t_user where N_USER_ID = ?";
+            PreparedStatement ps = DBTool.getPreparedStatement(sql);
+            ps.setInt(1, id);
+            rs = ps.executeQuery();
+            if(rs.next()) {
+                u.setId(rs.getInt("N_USER_ID"));
+                u.setName(rs.getString("VC_LOGIN_NAME"));
+                u.setPass(rs.getString("VC_PASSWORD"));
+            }else{
+                u = null;
+            }
+            DBTool.close(ps, rs);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return u;
+    }
+
+    @Override
+    public int addUser(UserInfo user) {
+        int lines = 0;
+        String sql = "INSERT INTO t_user (VC_LOGIN_NAME, VC_PASSWORD) VALUES (?, ?)";
+        try{
+            PreparedStatement ps = DBTool.getPreparedStatement(sql);
+            ps.setString(1, user.getName());
+            ps.setString(2, user.getPass());
+            lines = ps.executeUpdate();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return lines;
+    }
+
+    @Override
+    public int updateUser(UserInfo user) {
+        int lines = 0;
+        String sql = "UPDATE t_user SET VC_PASSWORD = ?,VC_LOGIN_NAME = ? WHERE N_USER_ID = ?";
+        try{
+            PreparedStatement ps = DBTool.getPreparedStatement(sql);
+            ps.setString(1, user.getPass());
+            ps.setString(2, user.getName());
+            ps.setInt(3, user.getId());
+            lines = ps.executeUpdate();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return lines;
+    }
+
+    @Override
+    public int deleteUser(int id) {
+        int lines = 0;
+        String sql = "DELETE FROM t_user WHERE N_USER_ID = ?";
+        try{
+           PreparedStatement ps = DBTool.getPreparedStatement(sql);
+           ps.setInt(1, id);
+           lines = ps.executeUpdate();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return 0;
+    }
+}
--- a/learn02/src/database.properties
+++ b/learn02/src/database.properties
@ -0,0 +1,41 @@
+#--------------------------------------------------------------------------------------------------
+#DriverClassName=com.mysql.cj.jdbc.Driver
+#url=jdbc:mysql://10.19.38.253:3306/chat?useUnicode=true&characterEncoding=utf-8&useSSL=true
+#username=admin
+#password=1227496003131313xY
+#--------------------------------------------------------------------------------------------------
+driverClassName=org.sqlite.JDBC
+url=jdbc:sqlite:F:\\Work_Area\\desk\\database\\Ñ§Ï°\\java²âÊÔÊý¾Ý¿â\\db_student.db
+#--------------------------------------------------------------------------------------------------
+
+defaultAutoCommit=true
+
+defaultReadOnly=false
+
+initialSize=10
+
+maxActive=20
+
+maxIdle=20
+
+minIdle=5
+
+maxWait=10000
+
+testOnBorrow=true
+
+testOnReturn=false
+
+validationQuery=select 1
+
+validationQueryTimeout=1
+
+testWhileIdle=false
+
+timeBetweenEvictionRunsMillis=1
+
+numTestsPerEvictionRun=3
+
+poolPreparedStatements=true
+
+maxOpenPreparedStatements=3
--- a/learn02/src/filters/GlobalFilter.java
+++ b/learn02/src/filters/GlobalFilter.java
@ -0,0 +1,17 @@
+package filters;
+
+import jakarta.servlet.*;
+import jakarta.servlet.annotation.WebFilter;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+import java.io.IOException;
+
+
+public class GlobalFilter implements Filter {
+    @Override
+    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
+        filterChain.doFilter(servletRequest, servletResponse);
+    }
+
+}
--- a/learn02/src/pojo/CourseInfo.java
+++ b/learn02/src/pojo/CourseInfo.java
@ -0,0 +1,33 @@
+package pojo;
+
+import lombok.*;
+
+
+
+
+@AllArgsConstructor
+@ToString
+@NoArgsConstructor
+@Data
+public class CourseInfo {
+    private int id;
+    private String name;
+    private int type;
+    private float credit;
+    private int grade;
+    private int major;
+    private String detail;
+
+    public String toJSON(){
+        String json="{";
+        json += "\"id\":"+id+",";
+        json += "\"name\":\""+name+"\",";
+        json += "\"type\":"+type+",";
+        json += "\"credit\":"+credit+",";
+        json += "\"grade\":"+grade+",";
+        json += "\"major\":"+major+",";
+        json += "\"detail\":\""+detail+"\"";
+        json += "}";
+        return json;
+    }
+}
--- a/learn02/src/pojo/ScoreInfo.java
+++ b/learn02/src/pojo/ScoreInfo.java
@ -0,0 +1,25 @@
+package pojo;
+
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.ToString;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@ToString
+public class ScoreInfo {
+    private int studentId;
+    private int courseId;
+    private float score;
+
+    public String toJSON(){
+        String json = "{";
+        json += "\"studentId\":" + studentId + ",";
+        json += "\"courseId\":" + courseId + ",";
+        json += "\"score\":" + score + ",";
+        return json + "}";
+    }
+}
--- a/learn02/src/pojo/StudentInfo.java
+++ b/learn02/src/pojo/StudentInfo.java
@ -0,0 +1,32 @@
+package pojo;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.ToString;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@ToString
+public class StudentInfo {
+    private int id;
+    private String code;
+    private String name;
+    private int sex;
+    private int grade;
+    private String major;
+    private String detail;
+
+    public String toJSON(){
+        String json = "{";
+        json += "\"id\":" + id + ",";
+        json += "\"code\":" + code + ",";
+        json += "\"name\":" + name + ",";
+        json += "\"sex\":" + sex + ",";
+        json += "\"grade\":" + grade + ",";
+        json += "\"major\":" + major + ",";
+        json += "\"detail\":" + detail + ",";
+        return json + "}";
+    }
+}
--- a/learn02/src/pojo/TeacherInfo.java
+++ b/learn02/src/pojo/TeacherInfo.java
@ -0,0 +1,30 @@
+package pojo;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.ToString;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@ToString
+public class TeacherInfo {
+    private int id;
+    private String name;
+    private int sex;
+    private String brith;
+    private int educ;
+    private int title;
+
+    public String toJSON(){
+        String json = "{";
+        json += "\"id\":" + id + ",";
+        json += "\"name\":\"" + name + "\",";
+        json += "\"sex\":" + sex + ",";
+        json += "\"brith\":\"" + brith + "\",";
+        json += "\"educ\":" + educ + ",";
+        json += "\"title\":" + title + ",";
+        return json;
+    }
+}
--- a/learn02/src/pojo/UserInfo.java
+++ b/learn02/src/pojo/UserInfo.java
@ -0,0 +1,25 @@
+package pojo;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import lombok.ToString;
+
+@AllArgsConstructor
+@NoArgsConstructor
+@Data
+@ToString
+public class UserInfo {
+    private int id;
+    private String name;
+    private String pass;
+
+    public String toJSON(){
+        String json = "{";
+        json += "\"id\":" + id + ",";
+        json += "\"name\":\"" + name + "\",";
+        json += "\"pass\":\"" + pass;
+        json += "}";
+        return json;
+    }
+}
--- a/learn02/src/service/CourseService.java
+++ b/learn02/src/service/CourseService.java
@ -0,0 +1,4 @@
+package service;
+
+public interface CourseService {
+}
--- a/learn02/src/service/UserService.java
+++ b/learn02/src/service/UserService.java
@ -0,0 +1,4 @@
+package service;
+
+public interface UserService {
+}
--- a/learn02/src/test/TestDao.java
+++ b/learn02/src/test/TestDao.java
@ -0,0 +1,15 @@
+package test;
+
+import dao.CourseDB;
+import dao.impl.CourseDBImpl;
+import pojo.CourseInfo;
+
+import java.util.ArrayList;
+
+public class TestDao {
+    public static void main(String[] args) {
+        CourseDB courseDB = new CourseDBImpl();
+        ArrayList<CourseInfo> courseInfos = courseDB.getAllCourseInfo();
+        System.out.println(courseInfos);
+    }
+}
--- a/learn02/web/course/course.jsp
+++ b/learn02/web/course/course.jsp
@ -0,0 +1,63 @@
+<%--
+  Created by IntelliJ IDEA.
+  User: 25589
+  Date: 2024/11/21
+  Time: 下午5:00
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" %>
+<!DOCTYPE html>
+<html lang="zh-cn">
+<head>
+    <meta charset="UTF-8">
+    <title>课程信息列表</title>
+    <link rel="stylesheet" href="${pageContext.request.contextPath}/css/course.css">
+    <link rel="stylesheet" href="${pageContext.request.contextPath}/css/common.css">
+</head>
+<body>
+<div class="container">
+    <table id="course-list">
+    </table>
+    <div class="course-editor"></div>
+    <br><br><br><br><br>
+    <table id="course-list-vue">
+        <tr class="tr-head">
+            <td class="tr-head" colspan="6">课程信息列表</td>
+        </tr>
+        <tr>
+            <td>名称</td>
+            <td>性质</td>
+            <td>学分</td>
+            <td>开设年级</td>
+            <td>开设专业</td>
+        </tr>
+        <tr v-for="course in courses">
+            <td>{{course.name}}</td>
+            <td>{{types[course.type]}}</td>
+            <td>{{course.credit}}</td>
+            <td>{{course.grade}}</td>
+            <td>{{majors[course.major]}}</td>
+            <td>
+                <a class="blue" @click="edit()">编辑</a>
+                <a class="red" :href="path+'/courseAction/delete?id='+course.id">删除</a>
+            </td>
+        </tr>
+
+        <tr>
+            <td><a href="#" class='blue' onclick="addCourse()">添加</a></td>
+            <td></td><td></td><td></td>
+            <td>
+                <a href="#" class='blue' onclick="getCourses()">刷新数据列表</a>
+            </td>
+            <td></td>
+        </tr>
+    </table>
+</div>
+</body>
+<script src="${pageContext.request.contextPath}/js/vue.min.js"></script>
+<script>
+    let path = "${pageContext.request.contextPath}";
+</script>
+<script src="${pageContext.request.contextPath}/js/jquery-3.7.1.min.js"></script>
+<script src="${pageContext.request.contextPath}/js/course-edit.js"></script>
+</html>
--- a/learn02/web/course/course_edit.jsp
+++ b/learn02/web/course/course_edit.jsp
@ -0,0 +1,87 @@
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<div class="container">
+    <form class="course-edit">
+        <input type="hidden" name="id" id="id-input" value="-1">
+        <table class="input-form">
+            <thead>
+            <tr>
+                <td class="td_header" colspan="3">课程信息录入，<span class="star">*</span>代表必填</td>
+            </tr>
+            </thead>
+            <tr>
+                <td><label for="name-input">名称</label></td>
+                <td>
+                    <input name="name" type="text" id="name-input">
+                </td>
+                <td>
+                    <span class="star">*</span>5~20位字符
+                </td>
+            </tr>
+            <tr>
+                <td><label for="type-input">性质</label></td>
+                <td>
+                    <select name="type" id="type-input">
+                        <option value="1">公共基础必修课</option>
+                        <option value="2">公共选修课</option>
+                        <option value="3">学科基础课</option>
+                        <option value="4">专业必修课</option>
+                        <option value="5">专业选修课</option>
+                        <option value="6">集中性实践教学环节</option>
+                    </select>
+                </td>
+                <td>
+                    <span class="star">*</span>
+                </td>
+            </tr>
+            <tr>
+                <td><label for="credit-input">学分</label></td>
+                <td>
+                    <input name="credit" type="number" id="credit-input">
+                </td>
+                <td>
+                    <span class="star">*</span>数值
+                </td>
+            </tr>
+            <tr>
+                <td><label for="grade-input">年份</label></td>
+                <td>
+                    <input name="grade" type="text" id="grade-input">
+                </td>
+                <td>
+                    <span class="star">*</span>4位数年份
+                </td>
+            </tr>
+            <tr>
+                <td>开设专业</td>
+                <td>
+                    <input name="major" value="1" type="radio" id="major-input-1">
+                    <label for="major-input-1">软件工程</label>
+                    <input name="major" value="2" type="radio" id="major-input-2">
+                    <label for="major-input-2">空间信息</label>
+                    <input name="major" value="3" type="radio" id="major-input-3">
+                    <label for="major-input-3">大数据</label>
+                </td>
+                <td>
+                    <span class="star">*</span>
+                </td>
+            </tr>
+            <tr>
+                <td><label for="detail-input">备注</label></td>
+                <td>
+                    <textarea rows="5" name="detail" id="detail-input"></textarea>
+                </td>
+                <td>
+                    200个字符以内
+                </td>
+            </tr>
+            <tfoot>
+            <tr>
+                <td colspan="3">
+                    <input type="submit" class="button">
+                    <button onclick="closeEdit()">关闭编辑</button>
+                </td>
+            </tr>
+            </tfoot>
+        </table>
+    </form>
+</div>
--- a/learn02/web/course/tmp
+++ b/learn02/web/course/tmp
@ -0,0 +1,82 @@
+<form action="" method="post" class="course-edit">
+<table class="input-form ">
+<thead>
+<tr>
+<td class="td_header" colspan="3">课程信息录入，<span class="star">*</span></td>
+</tr>
+</thead>
+<tr>
+<td><label for="name-input">名称</label></td>
+<td>
+<input name="name" type="text" id="name-input">
+</td>
+<td>
+<span class="star">*</span>5~20位字符
+</td>
+</tr>
+<tr>
+<td><label for="type-input">性质</label></td>
+<td>
+<select name="type" id="type-input">
+<option value="1">公共基础必修课</option>
+<option value="2">公共选修课</option>
+<option value="3">学科基础课</option>
+<option value="4">专业必修课</option>
+<option value="5">专业选修课</option>
+<option value="6">集中性实践教学环节</option>
+</select>
+</td>
+<td>
+<span class="star">*</span>
+</td>
+</tr>
+<tr>
+<td><label for="score-input">学分</label></td>
+<td>
+<input name="credit" type="number" id="score-input">
+</td>
+<td>
+<span class="star">*</span>数值
+</td>
+</tr>
+<tr>
+<td><label for="year-input">年份</label></td>
+<td>
+<input name="grade" type="text" id="year-input">
+</td>
+<td>
+<span class="star">*</span>4位数年份
+</td>
+</tr>
+<tr>
+<td>开设专业</td>
+<td>
+<input name="major" value="1" type="radio" id="major-input-1">
+<label for="major-input-1">软件工程</label>
+<input name="major" value="2" type="radio" id="major-input-2">
+<label for="major-input-2">空间信息</label>
+<input name="major" value="3" type="radio" id="major-input-3">
+<label for="major-input-3">大数据</label>
+</td>
+<td>
+<span class="star">*</span>
+</td>
+</tr>
+<tr>
+<td><label for="note-input">备注</label></td>
+<td>
+<textarea rows="5" name="detail" id="note-input"></textarea>
+</td>
+<td>
+200个字符以内
+</td>
+</tr>
+<tfoot>
+<tr>
+<td colspan="3">
+<input type="submit">
+</td>
+</tr>
+</tfoot>
+</table>
+</form>
--- a/learn02/web/css/common.css
+++ b/learn02/web/css/common.css
@ -0,0 +1,62 @@
+.container{
+    background-color: white;
+    position: relative;
+    margin: auto;
+    width: 80%;
+}
+
+body{
+    background-color: white;
+}
+
+a{
+    text-decoration: none;
+    color: white;
+    font-weight: bold;
+}
+
+table{
+    width:100%;
+    border-spacing: 0;
+    background-color: #c4c4c4;
+}
+
+tr{
+    height: 25px;
+    padding: 2px;
+}
+
+.tr-head{
+    background-color: #2bf;
+    text-align: center;
+}
+
+tr:nth-child(odd){
+    background:#F4F4F4;
+}
+
+button,.button{
+    background-color: #39f;
+    border: #39f solid 1px;
+    border-radius: 5px;
+    color: white;
+    padding: 5px;
+    line-height: 100%;
+    text-align: center;
+    margin: 5px;
+}
+
+.red {
+    COLOR: red
+}
+
+.blue {
+    color: blue;
+}
+
+.underline {
+    BORDER-BOTTOM: #c4c4c4 1pt solid;
+    BORDER-LEFT: #c4c4c4;
+    BORDER-RIGHT: #c4c4c4;
+    BORDER-TOP: #c4c4c4;
+}
--- a/learn02/web/css/course.css
+++ b/learn02/web/css/course.css
@ -0,0 +1,8 @@
+.input-form{
+    border: black solid 1px;
+    margin: auto;
+    td{
+        border: black solid 1px;
+    }
+}
+
--- a/learn02/web/css/index.css
+++ b/learn02/web/css/index.css
@ -0,0 +1,41 @@
+.nav-area{
+    position: absolute;
+    top: 0;
+    left: 0;
+    background-color: #2bf;
+    height: 95%;
+    width: 20%;
+    margin: 0;
+    padding: 5px;
+}
+
+.nav-list{
+    padding-left: 0;
+    padding-right: 5px;
+}
+
+.nav-item{
+    list-style: none;
+    line-height: 100%;
+    text-align: center;
+    font-size: 19px;
+    margin: 5px 0;
+    padding: 3px 0;
+    color: white;
+    a{
+        text-decoration: none;
+        color: white;
+        font-weight: bold;
+    }
+}
+
+.content{
+    position: absolute;
+    top: 0;
+    right: 0;
+    background-color: #eee;
+    height: 95%;
+    width: 79%;
+    margin: 0;
+    padding: 5px;
+}
--- a/learn02/web/css/login.css
+++ b/learn02/web/css/login.css
@ -0,0 +1,15 @@
+.login-card{
+    width: 80%;
+    border: #eee solid 2px;
+    border-radius: 5px;
+}
+input{
+    width: 75%;
+    height: 35px;
+    border: grey solid 2px;
+    border-radius: 5px;
+    margin: 5px;
+    padding: 5px;
+    line-height: 100%;
+    text-align: center;
+}
--- a/learn02/web/error.jsp
+++ b/learn02/web/error.jsp
@ -0,0 +1,16 @@
+<%@ page contentType="text/html;charset=UTF-8"%>
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>学生星系管理系统</title>
+</head>
+<body>
+<div class="container">
+    <h1>错误！</h1>
+    <h2>错误代码：<%=(request.getParameter("err-code") == null?"未知错误":request.getParameter("err-code"))%></h2>
+    <hr>
+    <p><%=(request.getParameter("msg") == null?"":request.getParameter("msg"))%></p>
+</div>
+</body>
+</html>
--- a/learn02/web/home.jsp
+++ b/learn02/web/home.jsp
@ -0,0 +1,44 @@
+<%--
+  Created by IntelliJ IDEA.
+  User: 25589
+  Date: 2024/12/3
+  Time: 上午12:17
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" %>
+<html>
+<head>
+    <title>主页</title>
+    <link rel="stylesheet" href="${pageContext.request.contextPath}/css/common.css">
+</head>
+<body>
+<div class="container">
+    <h1>学生信息管理系统</h1>
+
+    <%
+        if(session.getAttribute("user")==null){
+            out.println("<a href=\""+request.getContextPath()+"/login/login.jsp\"><button>登录</button></a>");
+        }else{
+            out.println("<a href=\""+request.getContextPath()+"/userAction/logout\"><button>注销</button></a>");
+        }
+    %>
+    <div id="app">
+        <label>
+            <input type="text" v-model="message">
+        </label>
+        {{ message }}
+        <h3 v-if="message === 'Hello vue'">这是Hello vue</h3>
+        <h3 v-else>这不是Hello vue</h3>
+    </div>
+</div>
+<script src="${pageContext.request.contextPath}/js/vue.min.js"></script>
+<script>
+    new Vue({
+        el: "#app",
+        data: {
+            message: "Hello vue"
+        }
+    });
+</script>
+</body>
+</html>
--- a/learn02/web/index.jsp
+++ b/learn02/web/index.jsp
@ -1,16 +1,25 @@
 <%--
  Created by IntelliJ IDEA.
-  User: awinx
-  Date: 2024/12/5
-  Time: <EFBFBD><EFBFBD><EFBFBD><EFBFBD>1:31
+  User: 25589
+  Date: 2024/11/28
+  Time: 下午1:20
  To change this template use File | Settings | File Templates.
 --%>
 <%@ page contentType="text/html;charset=UTF-8"%>
 <html>
  <head>
-    <title>$Title$</title>
+    <title>学生信息管理系统</title>
+    <link rel="stylesheet" href="${pageContext.request.contextPath}/css/index.css">
+    <link rel="stylesheet" href="${pageContext.request.contextPath}/css/common.css">
  </head>
  <body>
-  $END$
+  <div class="nav-area">
+    <ul class="nav-list">
+      <li class="nav-item"><a href="${pageContext.request.contextPath}/home.jsp" target="content">欢迎页</a></li>
+      <li class="nav-item"><a href="${pageContext.request.contextPath}/course/course.jsp" target="content">课程列表</a></li>
+    </ul>
+  </div>
+  <iframe src="${pageContext.request.contextPath}/home.jsp" class="content" name="content" height="100%" width="100%"></iframe>
  </body>
+  <script src="${pageContext.request.contextPath}/js/index.js"></script>
 </html>
--- a/learn02/web/js/course-edit.js
+++ b/learn02/web/js/course-edit.js
@ -0,0 +1,145 @@
+const types = ['', '公共基础必修课', '公共选修课', '学科基础课', '专业必修课', '专业选修课', '集中性实践教学环节']
+const majors = ['', '软件工程', '空间信息', '大数据'];
+let courses;
+
+new Vue({
+    el: "#course-list-vue",
+    data: {
+        courses: [],
+        types: types,
+        majors: majors,
+        path: path
+    },
+    mounted(){
+        $.ajax({
+            url: path+"/courseAction/list",
+            method: "GET",
+            success: (data, status, xhr) =>{
+                this.courses = data;
+            }
+        });
+    },
+    method: {
+        edit: ()=>{}
+    }
+});
+
+function getCourses(){
+    // $.ajax({
+    //     url:        path+"/courseAction/list",
+    //     method:     "GET",
+    //     success: (data, status, xhr)=>{
+    //         const course_list = document.getElementById('course-list');
+    //         console.log(xhr.status);
+    //         course_list.innerHTML = "<tr class=\"tr-head\"><td class=\"tr-head\" colspan=\"6\">课程信息列表</td></tr> <tr> <td>名称</td> <td>性质</td> <td>学分</td> <td>开设年级</td> <td>开设专业</td> </tr>"
+    //         courses = data;
+    //         for (let i in data){
+    //             const course_tr = document.createElement('tr');
+    //             course_tr.innerHTML="<td>"+ data[i].name +"</td>" +
+    //                 "<td>"+types[data[i].type]+"</td>" +
+    //                 "<td>"+ data[i].credit +"</td>" +
+    //                 "<td>"+ data[i].grade + "</td>" +
+    //                 "<td>"+ majors[data[i].major]+"</td>" +
+    //                 "<td><a class='blue' onclick=\"editCourse("+ i + ")\" " +
+    //                 ">编辑</a> <a class='red' href=\""+path+"/courseAction/delete?id=" +
+    //                 data[i].id+"\">删除</a></td>";
+    //             course_list.appendChild(course_tr);
+    //         }
+    //         const end_tr = document.createElement('tr');
+    //         end_tr.innerHTML="<td><a href=\"#\" class='blue' onclick=\"addCourse()\">添加</a></td><td></td><td></td><td></td><td>" +
+    //             "<a href=\"#\" class='blue' onclick=\"getCourses()\">刷新数据列表</a></td><td></td>";
+    //         course_list.appendChild(end_tr);
+    //     },
+    //     error: ()=>{
+    //         window.location=path+"/login/login.jsp";
+    //     }
+    // });
+}
+$(document).ready(getCourses);
+
+function editCourse(i){
+    $(".course-editor").load(path+"/course/course_edit.jsp", ()=>{
+        const form = document.querySelector('.course-edit');
+        form.action = path+"/courseAction/update";
+        form.method = "POST";
+        const idInput = document.getElementById('id-input');
+        idInput.value = courses[i].id;
+        const nameInput = document.getElementById('name-input');
+        nameInput.value = courses[i].name;
+        const typeInput = document.getElementById('type-input');
+        typeInput.value = courses[i].type;
+        const creditInput = document.getElementById('credit-input');
+        creditInput.value = courses[i].credit;
+        const yearInput = document.getElementById('grade-input');
+        yearInput.value = courses[i].grade;
+        const majorInputs = form.querySelectorAll('input[name="major"]');
+        majorInputs.forEach((input) => {
+            if (parseInt(input.value) === courses[i].major) {
+                input.checked = true;
+            }
+        });
+
+        const noteInput = form.querySelector('#detail-input');
+        noteInput.value = courses[i].detail;
+
+        form.addEventListener('submit', function (e) {
+            e.preventDefault();
+            const gradeInput = document.getElementById('grade-input');
+            if (!/^20\d{2}$/.test(gradeInput.value)) {
+                alert('请输入合法的四位年份');
+                return;
+            }
+
+            const nameInput = document.getElementById('name-input');
+            console.log(nameInput.value.length)
+            console.log(nameInput.value)
+            if (nameInput.value.length < 5 || nameInput.value.length > 20){
+                alert('请输入5~20位字符');
+                return;
+            }
+            const detailInput = document.getElementById('detail-input');
+            if (detailInput.value.length > 200){
+                alert('备注超长');
+                return;
+            }
+            $(".course-edit").submit();
+        });
+    });
+}
+
+function addCourse(){
+    $(".course-editor").load(path+"/courseAction/course_edit.jsp", ()=>{
+        const form = document.querySelector('.course-edit');
+        form.action = path+"/course/add";
+        form.addEventListener('submit', function (e) {
+            e.preventDefault();
+            const gradeInput = document.getElementById('grade-input');
+            if (!/^20\d{2}$/.test(gradeInput.value)) {
+                alert('请输入合法的四位年份');
+                return;
+            }
+
+            const nameInput = document.getElementById('name-input');
+            console.log(nameInput.value.length)
+            console.log(nameInput.value)
+            if (nameInput.value.length < 5 || nameInput.value.length > 20){
+                alert('请输入5~20位字符');
+                return;
+            }
+            const detailInput = document.getElementById('detail-input');
+            if (detailInput.value.length > 200){
+                alert('备注超长');
+                return;
+            }
+            $(".course-edit").submit();
+        });
+    });
+}
+
+function closeEdit(){
+    const editor = document.querySelector('.course-editor');
+    editor.innerHTML = "";
+}
+
+
+
--- a/learn02/web/js/index.js
+++ b/learn02/web/js/index.js
--- a/learn02/web/js/jquery-3.7.1.min.js
+++ b/learn02/web/js/jquery-3.7.1.min.js
--- a/learn02/web/js/vue.min.js
+++ b/learn02/web/js/vue.min.js
--- a/learn02/web/login/login.jsp
+++ b/learn02/web/login/login.jsp
@ -0,0 +1,41 @@
+<%--
+  Created by IntelliJ IDEA.
+  User: 25589
+  Date: 2024/12/1
+  Time: 下午11:58
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8"%>
+<html>
+<head>
+    <title>登录</title>
+    <link rel="stylesheet" href="${pageContext.request.contextPath}/css/login.css">
+    <link rel="stylesheet" href="${pageContext.request.contextPath}/css/common.css">
+</head>
+<body>
+    <div class="login-card">
+        <h1>登录</h1>
+        <form action="${pageContext.request.contextPath}/userAction/login" method="POST">
+            <label for="username-input">用户名</label><br>
+            <input type="text" name="username" id="username-input"><br>
+            <label for="password-input">密码</label><br>
+            <input type="password" name="password" id="password-input">
+            <input type="submit" class="button" value="登录">
+        </form>
+    </div>
+</body>
+<script>
+    <%
+    String loginFlag=request.getParameter("loginflag");
+    String username=request.getParameter("username");
+    if(loginFlag==null){ //无登录失败标识，是正常访问登录页面
+        loginFlag="";
+    }
+        if(loginFlag.equals("1")){
+            out.println("alert('用户【"+username+"】不存在！')");
+        }else if(loginFlag.equals("2")){
+            out.println("alert('密码错误！')");
+        }
+    %>
+</script>
+</html>
--- a/learn03-springboot/.gitattributes
+++ b/learn03-springboot/.gitattributes
@ -0,0 +1,2 @@
+/mvnw text eol=lf
+*.cmd text eol=crlf
--- a/learn03-springboot/.gitignore
+++ b/learn03-springboot/.gitignore
@ -0,0 +1,33 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
--- a/learn03-springboot/.mvn/wrapper/maven-wrapper.properties
+++ b/learn03-springboot/.mvn/wrapper/maven-wrapper.properties
@ -0,0 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+wrapperVersion=3.3.2
+distributionType=only-script
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.9/apache-maven-3.9.9-bin.zip
--- a/learn03-springboot/mvnw
+++ b/learn03-springboot/mvnw
@ -0,0 +1,259 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Apache Maven Wrapper startup batch script, version 3.3.2
+#
+# Optional ENV vars
+# -----------------
+#   JAVA_HOME - location of a JDK home dir, required when download maven via java source
+#   MVNW_REPOURL - repo url base for downloading maven distribution
+#   MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven
+#   MVNW_VERBOSE - true: enable verbose log; debug: trace the mvnw script; others: silence the output
+# ----------------------------------------------------------------------------
+
+set -euf
+[ "${MVNW_VERBOSE-}" != debug ] || set -x
+
+# OS specific support.
+native_path() { printf %s\\n "$1"; }
+case "$(uname)" in
+CYGWIN* | MINGW*)
+  [ -z "${JAVA_HOME-}" ] || JAVA_HOME="$(cygpath --unix "$JAVA_HOME")"
+  native_path() { cygpath --path --windows "$1"; }
+  ;;
+esac
+
+# set JAVACMD and JAVACCMD
+set_java_home() {
+  # For Cygwin and MinGW, ensure paths are in Unix format before anything is touched
+  if [ -n "${JAVA_HOME-}" ]; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ]; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+      JAVACCMD="$JAVA_HOME/jre/sh/javac"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+      JAVACCMD="$JAVA_HOME/bin/javac"
+
+      if [ ! -x "$JAVACMD" ] || [ ! -x "$JAVACCMD" ]; then
+        echo "The JAVA_HOME environment variable is not defined correctly, so mvnw cannot run." >&2
+        echo "JAVA_HOME is set to \"$JAVA_HOME\", but \"\$JAVA_HOME/bin/java\" or \"\$JAVA_HOME/bin/javac\" does not exist." >&2
+        return 1
+      fi
+    fi
+  else
+    JAVACMD="$(
+      'set' +e
+      'unset' -f command 2>/dev/null
+      'command' -v java
+    )" || :
+    JAVACCMD="$(
+      'set' +e
+      'unset' -f command 2>/dev/null
+      'command' -v javac
+    )" || :
+
+    if [ ! -x "${JAVACMD-}" ] || [ ! -x "${JAVACCMD-}" ]; then
+      echo "The java/javac command does not exist in PATH nor is JAVA_HOME set, so mvnw cannot run." >&2
+      return 1
+    fi
+  fi
+}
+
+# hash string like Java String::hashCode
+hash_string() {
+  str="${1:-}" h=0
+  while [ -n "$str" ]; do
+    char="${str%"${str#?}"}"
+    h=$(((h * 31 + $(LC_CTYPE=C printf %d "'$char")) % 4294967296))
+    str="${str#?}"
+  done
+  printf %x\\n $h
+}
+
+verbose() { :; }
+[ "${MVNW_VERBOSE-}" != true ] || verbose() { printf %s\\n "${1-}"; }
+
+die() {
+  printf %s\\n "$1" >&2
+  exit 1
+}
+
+trim() {
+  # MWRAPPER-139:
+  #   Trims trailing and leading whitespace, carriage returns, tabs, and linefeeds.
+  #   Needed for removing poorly interpreted newline sequences when running in more
+  #   exotic environments such as mingw bash on Windows.
+  printf "%s" "${1}" | tr -d '[:space:]'
+}
+
+# parse distributionUrl and optional distributionSha256Sum, requires .mvn/wrapper/maven-wrapper.properties
+while IFS="=" read -r key value; do
+  case "${key-}" in
+  distributionUrl) distributionUrl=$(trim "${value-}") ;;
+  distributionSha256Sum) distributionSha256Sum=$(trim "${value-}") ;;
+  esac
+done <"${0%/*}/.mvn/wrapper/maven-wrapper.properties"
+[ -n "${distributionUrl-}" ] || die "cannot read distributionUrl property in ${0%/*}/.mvn/wrapper/maven-wrapper.properties"
+
+case "${distributionUrl##*/}" in
+maven-mvnd-*bin.*)
+  MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/
+  case "${PROCESSOR_ARCHITECTURE-}${PROCESSOR_ARCHITEW6432-}:$(uname -a)" in
+  *AMD64:CYGWIN* | *AMD64:MINGW*) distributionPlatform=windows-amd64 ;;
+  :Darwin*x86_64) distributionPlatform=darwin-amd64 ;;
+  :Darwin*arm64) distributionPlatform=darwin-aarch64 ;;
+  :Linux*x86_64*) distributionPlatform=linux-amd64 ;;
+  *)
+    echo "Cannot detect native platform for mvnd on $(uname)-$(uname -m), use pure java version" >&2
+    distributionPlatform=linux-amd64
+    ;;
+  esac
+  distributionUrl="${distributionUrl%-bin.*}-$distributionPlatform.zip"
+  ;;
+maven-mvnd-*) MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/ ;;
+*) MVN_CMD="mvn${0##*/mvnw}" _MVNW_REPO_PATTERN=/org/apache/maven/ ;;
+esac
+
+# apply MVNW_REPOURL and calculate MAVEN_HOME
+# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-<version>,maven-mvnd-<version>-<platform>}/<hash>
+[ -z "${MVNW_REPOURL-}" ] || distributionUrl="$MVNW_REPOURL$_MVNW_REPO_PATTERN${distributionUrl#*"$_MVNW_REPO_PATTERN"}"
+distributionUrlName="${distributionUrl##*/}"
+distributionUrlNameMain="${distributionUrlName%.*}"
+distributionUrlNameMain="${distributionUrlNameMain%-bin}"
+MAVEN_USER_HOME="${MAVEN_USER_HOME:-${HOME}/.m2}"
+MAVEN_HOME="${MAVEN_USER_HOME}/wrapper/dists/${distributionUrlNameMain-}/$(hash_string "$distributionUrl")"
+
+exec_maven() {
+  unset MVNW_VERBOSE MVNW_USERNAME MVNW_PASSWORD MVNW_REPOURL || :
+  exec "$MAVEN_HOME/bin/$MVN_CMD" "$@" || die "cannot exec $MAVEN_HOME/bin/$MVN_CMD"
+}
+
+if [ -d "$MAVEN_HOME" ]; then
+  verbose "found existing MAVEN_HOME at $MAVEN_HOME"
+  exec_maven "$@"
+fi
+
+case "${distributionUrl-}" in
+*?-bin.zip | *?maven-mvnd-?*-?*.zip) ;;
+*) die "distributionUrl is not valid, must match *-bin.zip or maven-mvnd-*.zip, but found '${distributionUrl-}'" ;;
+esac
+
+# prepare tmp dir
+if TMP_DOWNLOAD_DIR="$(mktemp -d)" && [ -d "$TMP_DOWNLOAD_DIR" ]; then
+  clean() { rm -rf -- "$TMP_DOWNLOAD_DIR"; }
+  trap clean HUP INT TERM EXIT
+else
+  die "cannot create temp dir"
+fi
+
+mkdir -p -- "${MAVEN_HOME%/*}"
+
+# Download and Install Apache Maven
+verbose "Couldn't find MAVEN_HOME, downloading and installing it ..."
+verbose "Downloading from: $distributionUrl"
+verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName"
+
+# select .zip or .tar.gz
+if ! command -v unzip >/dev/null; then
+  distributionUrl="${distributionUrl%.zip}.tar.gz"
+  distributionUrlName="${distributionUrl##*/}"
+fi
+
+# verbose opt
+__MVNW_QUIET_WGET=--quiet __MVNW_QUIET_CURL=--silent __MVNW_QUIET_UNZIP=-q __MVNW_QUIET_TAR=''
+[ "${MVNW_VERBOSE-}" != true ] || __MVNW_QUIET_WGET='' __MVNW_QUIET_CURL='' __MVNW_QUIET_UNZIP='' __MVNW_QUIET_TAR=v
+
+# normalize http auth
+case "${MVNW_PASSWORD:+has-password}" in
+'') MVNW_USERNAME='' MVNW_PASSWORD='' ;;
+has-password) [ -n "${MVNW_USERNAME-}" ] || MVNW_USERNAME='' MVNW_PASSWORD='' ;;
+esac
+
+if [ -z "${MVNW_USERNAME-}" ] && command -v wget >/dev/null; then
+  verbose "Found wget ... using wget"
+  wget ${__MVNW_QUIET_WGET:+"$__MVNW_QUIET_WGET"} "$distributionUrl" -O "$TMP_DOWNLOAD_DIR/$distributionUrlName" || die "wget: Failed to fetch $distributionUrl"
+elif [ -z "${MVNW_USERNAME-}" ] && command -v curl >/dev/null; then
+  verbose "Found curl ... using curl"
+  curl ${__MVNW_QUIET_CURL:+"$__MVNW_QUIET_CURL"} -f -L -o "$TMP_DOWNLOAD_DIR/$distributionUrlName" "$distributionUrl" || die "curl: Failed to fetch $distributionUrl"
+elif set_java_home; then
+  verbose "Falling back to use Java to download"
+  javaSource="$TMP_DOWNLOAD_DIR/Downloader.java"
+  targetZip="$TMP_DOWNLOAD_DIR/$distributionUrlName"
+  cat >"$javaSource" <<-END
+	public class Downloader extends java.net.Authenticator
+	{
+	  protected java.net.PasswordAuthentication getPasswordAuthentication()
+	  {
+	    return new java.net.PasswordAuthentication( System.getenv( "MVNW_USERNAME" ), System.getenv( "MVNW_PASSWORD" ).toCharArray() );
+	  }
+	  public static void main( String[] args ) throws Exception
+	  {
+	    setDefault( new Downloader() );
+	    java.nio.file.Files.copy( java.net.URI.create( args[0] ).toURL().openStream(), java.nio.file.Paths.get( args[1] ).toAbsolutePath().normalize() );
+	  }
+	}
+	END
+  # For Cygwin/MinGW, switch paths to Windows format before running javac and java
+  verbose " - Compiling Downloader.java ..."
+  "$(native_path "$JAVACCMD")" "$(native_path "$javaSource")" || die "Failed to compile Downloader.java"
+  verbose " - Running Downloader.java ..."
+  "$(native_path "$JAVACMD")" -cp "$(native_path "$TMP_DOWNLOAD_DIR")" Downloader "$distributionUrl" "$(native_path "$targetZip")"
+fi
+
+# If specified, validate the SHA-256 sum of the Maven distribution zip file
+if [ -n "${distributionSha256Sum-}" ]; then
+  distributionSha256Result=false
+  if [ "$MVN_CMD" = mvnd.sh ]; then
+    echo "Checksum validation is not supported for maven-mvnd." >&2
+    echo "Please disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2
+    exit 1
+  elif command -v sha256sum >/dev/null; then
+    if echo "$distributionSha256Sum  $TMP_DOWNLOAD_DIR/$distributionUrlName" | sha256sum -c >/dev/null 2>&1; then
+      distributionSha256Result=true
+    fi
+  elif command -v shasum >/dev/null; then
+    if echo "$distributionSha256Sum  $TMP_DOWNLOAD_DIR/$distributionUrlName" | shasum -a 256 -c >/dev/null 2>&1; then
+      distributionSha256Result=true
+    fi
+  else
+    echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available." >&2
+    echo "Please install either command, or disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2
+    exit 1
+  fi
+  if [ $distributionSha256Result = false ]; then
+    echo "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised." >&2
+    echo "If you updated your Maven version, you need to update the specified distributionSha256Sum property." >&2
+    exit 1
+  fi
+fi
+
+# unzip and move
+if command -v unzip >/dev/null; then
+  unzip ${__MVNW_QUIET_UNZIP:+"$__MVNW_QUIET_UNZIP"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -d "$TMP_DOWNLOAD_DIR" || die "failed to unzip"
+else
+  tar xzf${__MVNW_QUIET_TAR:+"$__MVNW_QUIET_TAR"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -C "$TMP_DOWNLOAD_DIR" || die "failed to untar"
+fi
+printf %s\\n "$distributionUrl" >"$TMP_DOWNLOAD_DIR/$distributionUrlNameMain/mvnw.url"
+mv -- "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" "$MAVEN_HOME" || [ -d "$MAVEN_HOME" ] || die "fail to move MAVEN_HOME"
+
+clean || :
+exec_maven "$@"
--- a/learn03-springboot/mvnw.cmd
+++ b/learn03-springboot/mvnw.cmd
@ -0,0 +1,149 @@
+<# : batch portion
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Apache Maven Wrapper startup batch script, version 3.3.2
+@REM
+@REM Optional ENV vars
+@REM   MVNW_REPOURL - repo url base for downloading maven distribution
+@REM   MVNW_USERNAME/MVNW_PASSWORD - user and password for downloading maven
+@REM   MVNW_VERBOSE - true: enable verbose log; others: silence the output
+@REM ----------------------------------------------------------------------------
+
+@IF "%__MVNW_ARG0_NAME__%"=="" (SET __MVNW_ARG0_NAME__=%~nx0)
+@SET __MVNW_CMD__=
+@SET __MVNW_ERROR__=
+@SET __MVNW_PSMODULEP_SAVE=%PSModulePath%
+@SET PSModulePath=
+@FOR /F "usebackq tokens=1* delims==" %%A IN (`powershell -noprofile "& {$scriptDir='%~dp0'; $script='%__MVNW_ARG0_NAME__%'; icm -ScriptBlock ([Scriptblock]::Create((Get-Content -Raw '%~f0'))) -NoNewScope}"`) DO @(
+  IF "%%A"=="MVN_CMD" (set __MVNW_CMD__=%%B) ELSE IF "%%B"=="" (echo %%A) ELSE (echo %%A=%%B)
+)
+@SET PSModulePath=%__MVNW_PSMODULEP_SAVE%
+@SET __MVNW_PSMODULEP_SAVE=
+@SET __MVNW_ARG0_NAME__=
+@SET MVNW_USERNAME=
+@SET MVNW_PASSWORD=
+@IF NOT "%__MVNW_CMD__%"=="" (%__MVNW_CMD__% %*)
+@echo Cannot start maven from wrapper >&2 && exit /b 1
+@GOTO :EOF
+: end batch / begin powershell #>
+
+$ErrorActionPreference = "Stop"
+if ($env:MVNW_VERBOSE -eq "true") {
+  $VerbosePreference = "Continue"
+}
+
+# calculate distributionUrl, requires .mvn/wrapper/maven-wrapper.properties
+$distributionUrl = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionUrl
+if (!$distributionUrl) {
+  Write-Error "cannot read distributionUrl property in $scriptDir/.mvn/wrapper/maven-wrapper.properties"
+}
+
+switch -wildcard -casesensitive ( $($distributionUrl -replace '^.*/','') ) {
+  "maven-mvnd-*" {
+    $USE_MVND = $true
+    $distributionUrl = $distributionUrl -replace '-bin\.[^.]*$',"-windows-amd64.zip"
+    $MVN_CMD = "mvnd.cmd"
+    break
+  }
+  default {
+    $USE_MVND = $false
+    $MVN_CMD = $script -replace '^mvnw','mvn'
+    break
+  }
+}
+
+# apply MVNW_REPOURL and calculate MAVEN_HOME
+# maven home pattern: ~/.m2/wrapper/dists/{apache-maven-<version>,maven-mvnd-<version>-<platform>}/<hash>
+if ($env:MVNW_REPOURL) {
+  $MVNW_REPO_PATTERN = if ($USE_MVND) { "/org/apache/maven/" } else { "/maven/mvnd/" }
+  $distributionUrl = "$env:MVNW_REPOURL$MVNW_REPO_PATTERN$($distributionUrl -replace '^.*'+$MVNW_REPO_PATTERN,'')"
+}
+$distributionUrlName = $distributionUrl -replace '^.*/',''
+$distributionUrlNameMain = $distributionUrlName -replace '\.[^.]*$','' -replace '-bin$',''
+$MAVEN_HOME_PARENT = "$HOME/.m2/wrapper/dists/$distributionUrlNameMain"
+if ($env:MAVEN_USER_HOME) {
+  $MAVEN_HOME_PARENT = "$env:MAVEN_USER_HOME/wrapper/dists/$distributionUrlNameMain"
+}
+$MAVEN_HOME_NAME = ([System.Security.Cryptography.MD5]::Create().ComputeHash([byte[]][char[]]$distributionUrl) | ForEach-Object {$_.ToString("x2")}) -join ''
+$MAVEN_HOME = "$MAVEN_HOME_PARENT/$MAVEN_HOME_NAME"
+
+if (Test-Path -Path "$MAVEN_HOME" -PathType Container) {
+  Write-Verbose "found existing MAVEN_HOME at $MAVEN_HOME"
+  Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD"
+  exit $?
+}
+
+if (! $distributionUrlNameMain -or ($distributionUrlName -eq $distributionUrlNameMain)) {
+  Write-Error "distributionUrl is not valid, must end with *-bin.zip, but found $distributionUrl"
+}
+
+# prepare tmp dir
+$TMP_DOWNLOAD_DIR_HOLDER = New-TemporaryFile
+$TMP_DOWNLOAD_DIR = New-Item -Itemtype Directory -Path "$TMP_DOWNLOAD_DIR_HOLDER.dir"
+$TMP_DOWNLOAD_DIR_HOLDER.Delete() | Out-Null
+trap {
+  if ($TMP_DOWNLOAD_DIR.Exists) {
+    try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null }
+    catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" }
+  }
+}
+
+New-Item -Itemtype Directory -Path "$MAVEN_HOME_PARENT" -Force | Out-Null
+
+# Download and Install Apache Maven
+Write-Verbose "Couldn't find MAVEN_HOME, downloading and installing it ..."
+Write-Verbose "Downloading from: $distributionUrl"
+Write-Verbose "Downloading to: $TMP_DOWNLOAD_DIR/$distributionUrlName"
+
+$webclient = New-Object System.Net.WebClient
+if ($env:MVNW_USERNAME -and $env:MVNW_PASSWORD) {
+  $webclient.Credentials = New-Object System.Net.NetworkCredential($env:MVNW_USERNAME, $env:MVNW_PASSWORD)
+}
+[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
+$webclient.DownloadFile($distributionUrl, "$TMP_DOWNLOAD_DIR/$distributionUrlName") | Out-Null
+
+# If specified, validate the SHA-256 sum of the Maven distribution zip file
+$distributionSha256Sum = (Get-Content -Raw "$scriptDir/.mvn/wrapper/maven-wrapper.properties" | ConvertFrom-StringData).distributionSha256Sum
+if ($distributionSha256Sum) {
+  if ($USE_MVND) {
+    Write-Error "Checksum validation is not supported for maven-mvnd. `nPlease disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties."
+  }
+  Import-Module $PSHOME\Modules\Microsoft.PowerShell.Utility -Function Get-FileHash
+  if ((Get-FileHash "$TMP_DOWNLOAD_DIR/$distributionUrlName" -Algorithm SHA256).Hash.ToLower() -ne $distributionSha256Sum) {
+    Write-Error "Error: Failed to validate Maven distribution SHA-256, your Maven distribution might be compromised. If you updated your Maven version, you need to update the specified distributionSha256Sum property."
+  }
+}
+
+# unzip and move
+Expand-Archive "$TMP_DOWNLOAD_DIR/$distributionUrlName" -DestinationPath "$TMP_DOWNLOAD_DIR" | Out-Null
+Rename-Item -Path "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" -NewName $MAVEN_HOME_NAME | Out-Null
+try {
+  Move-Item -Path "$TMP_DOWNLOAD_DIR/$MAVEN_HOME_NAME" -Destination $MAVEN_HOME_PARENT | Out-Null
+} catch {
+  if (! (Test-Path -Path "$MAVEN_HOME" -PathType Container)) {
+    Write-Error "fail to move MAVEN_HOME"
+  }
+} finally {
+  try { Remove-Item $TMP_DOWNLOAD_DIR -Recurse -Force | Out-Null }
+  catch { Write-Warning "Cannot remove $TMP_DOWNLOAD_DIR" }
+}
+
+Write-Output "MVN_CMD=$MAVEN_HOME/bin/$MVN_CMD"
--- a/learn03-springboot/pom.xml
+++ b/learn03-springboot/pom.xml
@ -0,0 +1,85 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>3.4.0</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <groupId>top.awin-x</groupId>
+    <artifactId>learn03-springboot</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>war</packaging>
+    <name>learn03-springboot</name>
+    <description>learn03-springboot</description>
+    <url/>
+    <licenses>
+        <license/>
+    </licenses>
+    <developers>
+        <developer/>
+    </developers>
+    <scm>
+        <connection/>
+        <developerConnection/>
+        <tag/>
+        <url/>
+    </scm>
+    <properties>
+        <java.version>21</java.version>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-tomcat</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <annotationProcessorPaths>
+                        <path>
+                            <groupId>org.projectlombok</groupId>
+                            <artifactId>lombok</artifactId>
+                        </path>
+                    </annotationProcessorPaths>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <configuration>
+                    <excludes>
+                        <exclude>
+                            <groupId>org.projectlombok</groupId>
+                            <artifactId>lombok</artifactId>
+                        </exclude>
+                    </excludes>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
--- a/learn03-springboot/src/main/java/top/awin_x/learn/Learn03SpringbootApplication.java
+++ b/learn03-springboot/src/main/java/top/awin_x/learn/Learn03SpringbootApplication.java
@ -0,0 +1,13 @@
+package top.awin_x.learn;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Learn03SpringbootApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Learn03SpringbootApplication.class, args);
+    }
+
+}
--- a/learn03-springboot/src/main/java/top/awin_x/learn/ServletInitializer.java
+++ b/learn03-springboot/src/main/java/top/awin_x/learn/ServletInitializer.java
@ -0,0 +1,13 @@
+package top.awin_x.learn;
+
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
+
+public class ServletInitializer extends SpringBootServletInitializer {
+
+    @Override
+    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
+        return application.sources(Learn03SpringbootApplication.class);
+    }
+
+}
--- a/learn03-springboot/src/main/resources/application.properties
+++ b/learn03-springboot/src/main/resources/application.properties
@ -0,0 +1 @@
+spring.application.name=learn03-springboot
--- a/learn03-springboot/src/test/java/top/awin_x/learn/Learn03SpringbootApplicationTests.java
+++ b/learn03-springboot/src/test/java/top/awin_x/learn/Learn03SpringbootApplicationTests.java
@ -0,0 +1,13 @@
+package top.awin_x.learn;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class Learn03SpringbootApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}
--- a/learn1/src/course/CourseDB.java
+++ b/learn1/src/course/CourseDB.java
@ -77,7 +77,7 @@ public class CourseDB {
    }

    public static void insertCourse(CourseInfo course){
-        try{
+        try {
            String sql = "INSERT INTO t_course (VC_COURSE_NAME, N_TYPE, F_CREDIT, N_GRADE, N_MAJOR, VC_DETAIL) VALUES(?, ?, ?, ?, ?, ?)";
            PreparedStatement ps = DBTool.getPreparedStatement(sql);
            ps.setString(1, course.getName());