潘祉岳202422280902个人部分

.gitignore

@@ -0,0 +1,2 @@
+/.idea/
+/tomcat.8080/

pom.xml

@@ -0,0 +1,68 @@
+<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>org.example</groupId>
+  <artifactId>tomcat_main</artifactId>
+  <version>1.0-SNAPSHOT</version>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-compiler-plugin</artifactId>
+        <configuration>
+          <source>9</source>
+          <target>9</target>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+  <packaging>war</packaging>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+    <maven.compiler.source>11</maven.compiler.source>
+    <maven.compiler.target>11</maven.compiler.target>
+    <java.version>11</java.version>
+    <tomcat.version>9.0.39</tomcat.version>
+  </properties>
+
+  <dependencies>
+    <!-- jstl表达式依赖-->
+    <dependency>
+      <groupId>javax.servlet.jsp.jstl</groupId>
+      <artifactId>javax.servlet.jsp.jstl-api</artifactId>
+      <version>1.2.1</version>
+    </dependency>
+    <!-- taglibs 标签库依赖-->
+    <dependency>
+      <groupId>taglibs</groupId>
+      <artifactId>standard</artifactId>
+      <version>1.1.2</version>
+    </dependency>
+
+<!--    tomcat依赖-->
+    <dependency>
+      <groupId>org.apache.tomcat.embed</groupId>
+      <artifactId>tomcat-embed-core</artifactId>
+      <version>9.0.39</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.apache.tomcat.embed</groupId>
+      <artifactId>tomcat-embed-jasper</artifactId>
+      <version>9.0.39</version>
+      <scope>provided</scope>
+    </dependency>
+<!--    mysql依赖-->
+    <dependency>
+      <groupId>mysql</groupId>
+      <artifactId>mysql-connector-java</artifactId>
+      <version>8.0.22</version>
+    </dependency>
+
+  </dependencies>
+</project>

src/main/java/com/Main.java

@@ -0,0 +1,25 @@
+package com;
+
+import java.io.File;
+import org.apache.catalina.Context;
+import org.apache.catalina.WebResourceRoot;
+import org.apache.catalina.startup.Tomcat;
+import org.apache.catalina.webresources.DirResourceSet;
+import org.apache.catalina.webresources.StandardRoot;
+
+public class Main {
+  public static void main(String[] args) throws Exception {
+    // 启动Tomcat:
+    Tomcat tomcat = new Tomcat();
+    tomcat.setPort(Integer.getInteger("port", 8080));
+    tomcat.getConnector();
+    // 创建webapp:
+    Context ctx = tomcat.addWebapp("", new File("src/main/webapp").getAbsolutePath());
+    WebResourceRoot resources = new StandardRoot(ctx);
+    resources.addPreResources(
+        new DirResourceSet(resources, "/WEB-INF/classes", new File("target/classes").getAbsolutePath(), "/"));
+    ctx.setResources(resources);
+    tomcat. start();
+    tomcat.getServer().await();
+  }
+}

src/main/java/com/bean/Comment.java

@@ -0,0 +1,72 @@
+package com.bean;
+
+import java.sql.Date;
+
+public class Comment {
+  private int id;
+  private int post_id;
+  private String author;
+  private String content;
+  private java.sql.Date date;
+
+  public Comment() {}
+
+  public Comment(int id, int post_id, String author, String content, Date date) {
+    this.id = id;
+    this.post_id = post_id;
+    this.author = author;
+    this.content = content;
+    this.date = date;
+  }
+
+  public int getId() {
+    return id;
+  }
+
+  public void setId(int id) {
+    this.id = id;
+  }
+
+  public int getPost_id() {
+    return post_id;
+  }
+
+  public void setPost_id(int post_id) {
+    this.post_id = post_id;
+  }
+
+  public String getAuthor() {
+    return author;
+  }
+
+  public void setAuthor(String author) {
+    this.author = author;
+  }
+
+  public String getContent() {
+    return content;
+  }
+
+  public void setContent(String content) {
+    this.content = content;
+  }
+
+  public Date getDate() {
+    return date;
+  }
+
+  public void setDate(Date date) {
+    this.date = date;
+  }
+
+  @Override
+  public String toString() {
+    return "comment{" +
+        "id=" + id +
+        ", post_id=" + post_id +
+        ", author='" + author + '\'' +
+        ", content='" + content + '\'' +
+        ", date=" + date +
+        '}';
+  }
+}

src/main/java/com/bean/Post.java

@@ -0,0 +1,93 @@
+package com.bean;
+
+public class Post {
+  private int id;
+  private String title;
+  private String author;
+  private String type;
+  private String content;
+  private java.sql.Date date;
+
+  public Post() {}
+
+  public Post(
+      int id, String title, String author, String type, String content, java.sql.Date date) {
+    this.id = id;
+    this.title = title;
+    this.author = author;
+    this.type = type;
+    this.content = content;
+    this.date = date;
+  }
+
+  public int getId() {
+    return id;
+  }
+
+  public void setId(int id) {
+    this.id = id;
+  }
+
+  public String getTitle() {
+    return title;
+  }
+
+  public void setTitle(String title) {
+    this.title = title;
+  }
+
+  public String getAuthor() {
+    return author;
+  }
+
+  public void setAuthor(String author) {
+    this.author = author;
+  }
+
+  public String getType() {
+    return type;
+  }
+
+  public void setType(String type) {
+    this.type = type;
+  }
+
+  public String getContent() {
+    return content;
+  }
+
+  public void setContent(String content) {
+    this.content = content;
+  }
+
+  public java.sql.Date getDate() {
+    return date;
+  }
+
+  public void setDate(java.sql.Date date) {
+    this.date = date;
+  }
+
+  @Override
+  public String toString() {
+    return "Post{"
+        + "id="
+        + id
+        + ", title='"
+        + title
+        + '\''
+        + ", author='"
+        + author
+        + '\''
+        + ", type='"
+        + type
+        + '\''
+        + ", content='"
+        + content
+        + '\''
+        + ", date='"
+        + date
+        + '\''
+        + '}';
+  }
+}

src/main/java/com/bean/User.java

@@ -0,0 +1,80 @@
+package com.bean;
+
+public class User {
+  private int uid;
+  private String name;
+  private String passwd;
+  private String sex;
+  private java.sql.Date rtime;
+
+  public User() {
+    this.sex = "man";
+  }
+
+  public User(int uid, String name, String passwd, String sex, java.sql.Date rtime) {
+    this.uid = uid;
+    this.name = name;
+    this.passwd = passwd;
+    this.sex = sex;
+    this.rtime = rtime;
+  }
+
+  public int getUid() {
+    return uid;
+  }
+
+  public void setUid(int uid) {
+    this.uid = uid;
+  }
+
+  public String getName() {
+    return name;
+  }
+
+  public void setName(String name) {
+    this.name = name;
+  }
+
+  public String getPasswd() {
+    return passwd;
+  }
+
+  public void setPasswd(String passwd) {
+    this.passwd = passwd;
+  }
+
+  public String getSex() {
+    return sex;
+  }
+
+  public void setSex(String sex) {
+    this.sex = sex;
+  }
+
+  public java.sql.Date getRtime() {
+    return rtime;
+  }
+
+  public void setRtime(java.sql.Date rtime) {
+    this.rtime = rtime;
+  }
+
+  @Override
+  public String toString() {
+    return "User{"
+        + "uid="
+        + uid
+        + ", name='"
+        + name
+        + '\''
+        + ", passwd='"
+        + passwd
+        + '\''
+        + ", sex='"
+        + sex
+        + '\''
+        + ", rtime="
+        + rtime
+        + '}';
+  }
+}

src/main/java/com/controller/CommentAdd.java

@@ -0,0 +1,52 @@
+package com.controller;
+
+import com.bean.Comment;
+import com.dao.iCommentDAO;
+import com.service.CommentDAO;
+
+import java.io.IOException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+
+@WebServlet("/CommentAdd")
+public class CommentAdd extends HttpServlet {
+  @Override
+  protected void doPost(HttpServletRequest request, HttpServletResponse response)
+      throws IOException {
+    request.setCharacterEncoding("UTF-8");
+    int post_id = Integer.parseInt(request.getParameter("post_id").trim());
+    HttpSession session = request.getSession();
+    String author = (String) session.getAttribute("username_session");
+    String content = request.getParameter("content");
+    Comment comment = new Comment();
+    comment.setPost_id(post_id);
+    comment.setAuthor(author);
+    comment.setContent(content);
+
+    iCommentDAO iCommentDAO = new CommentDAO();
+    try {
+      iCommentDAO.create(comment);
+      response
+          .getWriter()
+          .print(
+              "<script type=\"text/javascript\">\n"
+                  + "window.location.href='post.jsp?id="+post_id +"'\n"
+                  + "</script>");
+//      response.sendRedirect("/mine.jsp");
+    } catch (Exception e) {
+      e.printStackTrace();
+      String info = "评论失败失败";
+      request.setAttribute("outputMessage",info);
+      response.sendRedirect("/info.jsp");
+    }
+  }
+
+  @Override
+  protected void doGet(HttpServletRequest request, HttpServletResponse response)
+      throws IOException {
+    doPost(request,response);
+  }
+}

src/main/java/com/controller/PostWrite.java

@@ -0,0 +1,55 @@
+package com.controller;
+
+import com.bean.Post;
+import com.dao.IPostDAO;
+import com.service.PostDAO;
+
+import java.io.IOException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+
+@WebServlet("/PostWrite")
+public class PostWrite extends HttpServlet {
+@Override
+  protected void doPost(HttpServletRequest request, HttpServletResponse response)
+      throws IOException {
+    request.setCharacterEncoding("UTF-8");
+    String title = request.getParameter("title");
+    HttpSession session = request.getSession();
+    String author = (String) session.getAttribute("username_session");
+    String type = request.getParameter("ntype");
+    String content = request.getParameter("content");
+
+    Post post = new Post();
+    post.setTitle(title);
+    post.setAuthor(author);
+    post.setType(type);
+    post.setContent(content);
+
+    IPostDAO iPostDAO = new PostDAO();
+    try {
+      iPostDAO.create(post);
+      post = iPostDAO.findByTitle(post);
+      response
+          .getWriter()
+          .print(
+              "<script type=\"text/javascript\">\n"
+                  + "window.location.href='post.jsp?id="+post.getId()+"'\n"
+                  + "</script>");
+    } catch (Exception e) {
+      e.printStackTrace();
+      String info = "文章录入失败";
+      request.setAttribute("outputMessage",info);
+      response.sendRedirect("/info.jsp");
+    }
+}
+
+@Override
+  protected void doGet(HttpServletRequest request, HttpServletResponse response)
+      throws IOException {
+    doPost(request,response);
+  }
+}

src/main/java/com/controller/SignCheck.java

@@ -0,0 +1,56 @@
+package com.controller;
+
+import com.bean.User;
+import com.dao.IUserDAO;
+import com.service.UserDAO;
+
+import java.io.IOException;
+import java.io.PrintWriter;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+@WebServlet("/SignCheck")
+public class SignCheck extends HttpServlet {
+
+  @Override
+  protected void doPost(HttpServletRequest request, HttpServletResponse response)
+      throws IOException {
+    String username = request.getParameter("username");
+    String userpwd = request.getParameter("userpwd");
+    String reuserpwd = request.getParameter("reuserpwd");
+    if (!userpwd.equals(reuserpwd)) {
+      String info = "两次输入的密码不一致";
+      request.setAttribute("outputMessage",info);
+      response.sendRedirect("/info.jsp");
+    }
+    IUserDAO iUserDAO = new UserDAO();
+    try {
+      if (!iUserDAO.check(username)){
+        String info = "用户名已存在";
+        request.setAttribute("outputMessage",info);
+        PrintWriter out = response.getWriter();
+        out.print("<h1>hello</1>");
+        response.sendRedirect("/info.jsp");
+      } else {
+        User user = new User();
+        user.setName(username);
+        user.setPasswd(userpwd);
+        iUserDAO.create(user);
+        response.sendRedirect("/index.html");
+      }
+    } catch (Exception e) {
+      e.printStackTrace();
+    }
+  }
+
+  @Override
+  protected void doGet(HttpServletRequest request, HttpServletResponse response)
+      throws IOException {
+    doPost(request,response);
+  }
+
+
+}
+

src/main/java/com/controller/loginCheck.java

@@ -0,0 +1,60 @@
+package com.controller;
+
+import com.bean.User;
+import com.dao.IUserDAO;
+import com.service.UserDAO;
+
+import java.io.IOException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+
+@WebServlet("/loginCheck")
+public class loginCheck extends HttpServlet {
+  public void doPost(HttpServletRequest request, HttpServletResponse response)
+      throws IOException {
+    String userName = request.getParameter("username");
+    String userPwd = request.getParameter("userpwd");
+    String info;
+    User user = new User();
+    user.setName(userName);
+    user.setPasswd(userPwd);
+    IUserDAO iUserDAO = new UserDAO();
+    int i = 0;
+    try {
+      i = iUserDAO.check(user);
+    } catch (Exception e) {
+      e.printStackTrace();
+    }
+    HttpSession session = request.getSession();
+    response.setContentType("text/html;charset=utf-8");
+    switch (i) {
+      case -1:
+        info = "用户名不存在";
+        //        out.print("<script>alert('username isn't
+        // exit');window.history.back(-1);</script>");
+        request.setAttribute("outputMessage", info);
+        response.sendRedirect("/info.jsp");
+        break;
+      case 0:
+        info = "密码不正确";
+        //        out.print("<script>alert('password error');window.history.back(-1);</script>");
+        request.setAttribute("outputMessage", info);
+        response.sendRedirect("/info.jsp");
+        break;
+      case 1:
+        info = "登录成功";
+        session.setAttribute("username_session", userName);
+        request.setAttribute("outputMessage", info);
+        response.sendRedirect("/home.jsp");
+        break;
+    }
+  }
+
+  public void doGet(HttpServletRequest request, HttpServletResponse response)
+      throws IOException {
+    doPost(request, response);
+  }
+}

src/main/java/com/dao/IPostDAO.java

@@ -0,0 +1,15 @@
+package com.dao;
+
+import com.bean.Post;
+import java.util.List;
+
+public interface IPostDAO {
+  void create(Post post) throws Exception;
+  void remove(Post post) throws Exception ;
+  Post findById(Post post) throws Exception;
+  Post findByTitle(Post post) throws Exception;
+  List<Post> findByAuthor (String author) throws Exception;
+  List<Post> findByType (String type) throws Exception;
+  List<Post> findAll() throws Exception;
+  void update(Post post) throws Exception;
+}

src/main/java/com/dao/IUserDAO.java

@@ -0,0 +1,15 @@
+package com.dao;
+
+import com.bean.User;
+import java.util.List;
+
+public interface IUserDAO {
+  void create(User user) throws Exception;
+  void remove(User user) throws Exception ;
+  User findById(User user) throws Exception;
+  User findByName(User user) throws Exception;
+  List<User> findAll() throws Exception;
+  void update(User user) throws Exception;
+  int check(User user) throws Exception;
+  boolean check(String name) throws Exception;
+}

src/main/java/com/dao/iCommentDAO.java

@@ -0,0 +1,17 @@
+package com.dao;
+
+import com.bean.Comment;
+import com.bean.Post;
+import com.bean.User;
+
+import java.util.List;
+
+public interface iCommentDAO {
+  void create(Comment comment) throws Exception;
+  void remove(Comment comment) throws Exception ;
+  Comment findById(Comment comment) throws Exception;
+  List<Comment> findByAuthor(User user) throws Exception;
+  List<Comment> findByPostId (Post post) throws Exception;
+  List<Comment> findAll() throws Exception;
+  void update(Comment comment) throws Exception;
+}

src/main/java/com/db/DBConn.java

@@ -0,0 +1,35 @@
+package com.db;
+
+import java.sql.*;
+
+public class DBConn {
+  private static final String driverName = "com.mysql.cj.jdbc.Driver";
+  private static final String userName = "root";
+  private static final String userPwd = "1234";
+  private static final String dbName = "forumsys";
+
+  public static Connection getDBconnection() {
+    String url1 = "jdbc:mysql://localhost/" +dbName;
+    String url2 = "?user="+userName+"&password=" +userPwd;
+    String url3 = "&useUnicode=true&characterEncoding=UTF-8&&serverTimezone=UTC";
+    String url = url1+url2 +url3;
+
+    try{
+      Class.forName(driverName);
+      return DriverManager.getConnection(url);
+    }catch (Exception e) {
+      e.printStackTrace();
+    }
+    return null;
+  }
+
+  public static void closeDB(Connection conn, PreparedStatement pstm, ResultSet rs) {
+    try{
+      if (rs!=null) rs.close();
+      if (pstm!=null) pstm.close();
+      if (conn!=null) conn.close();
+    } catch (SQLException e){
+      e.printStackTrace();
+    }
+  }
+}

src/main/java/com/service/CommentDAO.java

@@ -0,0 +1,168 @@
+package com.service;
+
+import com.bean.Comment;
+import com.bean.Post;
+import com.bean.User;
+import com.dao.iCommentDAO;
+import com.db.DBConn;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class CommentDAO implements iCommentDAO {
+
+  protected static final String FIELDS_INSERT = "id,post_id,author,content,date";
+  protected static String INSERT_SQL =
+      "insert into comment (" + FIELDS_INSERT + ")" + "values(0,?,?,?,NOW())";
+  protected static String SELECT_SQL = "select " + FIELDS_INSERT + " from post where id=?";
+  protected static String SELECT_SQL2 = "select " + FIELDS_INSERT + " from post where post_id=?";
+  protected static String UPDATE_SQL =
+      "update post set" + " content=? where id=?";
+  protected static String DELETE_SQL = "delete from post where id=?";
+
+  @Override
+  public void create(Comment comment) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    conn = DBConn.getDBconnection();
+
+    assert conn != null;
+    pstm = conn.prepareStatement(INSERT_SQL);
+    pstm.setInt(1, comment.getPost_id());
+    pstm.setString(2, comment.getAuthor());
+    pstm.setString(3, comment.getContent());
+    pstm.executeUpdate();
+
+    DBConn.closeDB(conn, pstm, null);
+  }
+
+  @Override
+  public void remove(Comment comment) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    conn = DBConn.getDBconnection();
+
+    assert conn != null;
+    pstm = conn.prepareStatement(DELETE_SQL);
+    pstm.setInt(1, comment.getId());
+    pstm.executeUpdate();
+    DBConn.closeDB(conn, pstm, null);
+  }
+
+  @Override
+  public Comment findById(Comment comment) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    ResultSet rs;
+    Comment comment1 = null;
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement(SELECT_SQL);
+    pstm.setInt(1, comment.getId());
+    rs = pstm.executeQuery();
+    if (rs.next()) {
+      comment1 =
+          new Comment(
+              rs.getInt(1),
+              rs.getInt(2),
+              rs.getString(3),
+              rs.getString(4),
+              rs.getDate(6));
+    }
+    DBConn.closeDB(conn, pstm, rs);
+    return comment1;
+  }
+
+  @Override
+  public List<Comment> findByAuthor(User user) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    ResultSet rs;
+    List<Comment> comments = new ArrayList<>();
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement("select * from comment where author=?");
+    pstm.setString(1, user.getName());
+    rs = pstm.executeQuery();
+    while (rs.next()) {
+      Comment comment =
+          new Comment(
+              rs.getInt(1),
+              rs.getInt(2),
+              rs.getString(3),
+              rs.getString(4),
+              rs.getDate(5));
+      comments.add(comment);
+    }
+    DBConn.closeDB(conn, pstm, rs);
+    return comments;
+  }
+
+  @Override
+  public List<Comment> findByPostId(Post post) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    ResultSet rs;
+    List<Comment> comments = new ArrayList<>();
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement("select * from comment where post_id=?");
+    pstm.setInt(1, post.getId());
+    rs = pstm.executeQuery();
+    while (rs.next()) {
+      Comment comment =
+          new Comment(
+              rs.getInt(1),
+              rs.getInt(2),
+              rs.getString(3),
+              rs.getString(4),
+              rs.getDate(5));
+      comments.add(comment);
+    }
+    DBConn.closeDB(conn, pstm, rs);
+    return comments;
+  }
+
+  @Override
+  public List<Comment> findAll() throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    ResultSet rs;
+    List<Comment> comments = new ArrayList<>();
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement("select * from comment");
+    rs = pstm.executeQuery();
+    while (rs.next()) {
+      Comment comment =
+          new Comment(
+              rs.getInt(1),
+              rs.getInt(2),
+              rs.getString(3),
+              rs.getString(4),
+              rs.getDate(5));
+      comments.add(comment);
+    }
+    DBConn.closeDB(conn, pstm, rs);
+    return comments;
+  }
+
+  @Override
+  public void update(Comment comment) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement(UPDATE_SQL);
+    pstm.setString(1, comment.getContent());
+    int rowCount = pstm.executeUpdate();
+    if (rowCount == 0) {
+      throw new SQLException("Update Error:Post id:" + comment.getId());
+    }
+    DBConn.closeDB(conn, pstm, null);
+  }
+}

src/main/java/com/service/PostDAO.java

@@ -0,0 +1,200 @@
+package com.service;
+
+import com.bean.Post;
+import com.dao.IPostDAO;
+import com.db.DBConn;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class PostDAO implements IPostDAO {
+
+  protected static final String FIELDS_INSERT = "id, title, author, type, content, date";
+  protected static String INSERT_SQL =
+      "insert into post (" + FIELDS_INSERT + ")" + "values(0,?,?,?,?,NOW())";
+  protected static String SELECT_SQL = "select " + FIELDS_INSERT + " from post where id=?";
+  protected static String SELECT_SQL2 = "select " + FIELDS_INSERT + " from post where title=?";
+  protected static String UPDATE_SQL =
+      "update post set" + " title=?,author=?,type=?,content=? where id=?";
+  protected static String DELETE_SQL = "delete from post where id=?";
+
+  @Override
+  public void create(Post post) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    conn = DBConn.getDBconnection();
+
+    assert conn != null;
+    pstm = conn.prepareStatement(INSERT_SQL);
+    pstm.setString(1, post.getTitle());
+    pstm.setString(2, post.getAuthor());
+    pstm.setString(3, post.getType());
+    pstm.setString(4, post.getContent());
+    pstm.executeUpdate();
+
+    DBConn.closeDB(conn, pstm, null);
+  }
+
+  @Override
+  public void remove(Post post) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    conn = DBConn.getDBconnection();
+
+    assert conn != null;
+    pstm = conn.prepareStatement(DELETE_SQL);
+    pstm.setInt(1, post.getId());
+    pstm.executeUpdate();
+    DBConn.closeDB(conn, pstm, null);
+  }
+
+  @Override
+  public Post findById(Post post) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    ResultSet rs;
+    Post post2 = null;
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement(SELECT_SQL);
+    pstm.setInt(1, post.getId());
+    rs = pstm.executeQuery();
+    if (rs.next()) {
+      post2 =
+          new Post(
+              rs.getInt(1),
+              rs.getString(2),
+              rs.getString(3),
+              rs.getString(4),
+              rs.getString(5),
+              rs.getDate(6));
+    }
+    DBConn.closeDB(conn, pstm, rs);
+    return post2;
+  }
+
+  @Override
+  public Post findByTitle(Post post) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    ResultSet rs;
+    Post post2 = null;
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement(SELECT_SQL2);
+    pstm.setString(1, post.getTitle());
+    rs = pstm.executeQuery();
+    if (rs.next()) {
+      post2 =
+          new Post(
+              rs.getInt(1),
+              rs.getString(2),
+              rs.getString(3),
+              rs.getString(4),
+              rs.getString(5),
+              rs.getDate(6));
+    }
+    DBConn.closeDB(conn, pstm, rs);
+    return post2;
+  }
+
+  @Override
+  public List<Post> findByAuthor(String author) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    ResultSet rs;
+    List<Post> posts = new ArrayList<>();
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement("select * from post where author=?");
+    pstm.setString(1, author);
+    rs = pstm.executeQuery();
+    while (rs.next()) {
+      Post post2 =
+          new Post(
+              rs.getInt(1),
+              rs.getString(2),
+              rs.getString(3),
+              rs.getString(4),
+              rs.getString(5),
+              rs.getDate(6));
+      posts.add(post2);
+    }
+    DBConn.closeDB(conn, pstm, rs);
+    return posts;
+  }
+
+  @Override
+  public List<Post> findByType(String type) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    ResultSet rs;
+    List<Post> posts = new ArrayList<>();
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement("select * from post where type=?");
+    pstm.setString(1, type);
+    rs = pstm.executeQuery();
+    while (rs.next()) {
+      Post post2 =
+          new Post(
+              rs.getInt(1),
+              rs.getString(2),
+              rs.getString(3),
+              rs.getString(4),
+              rs.getString(5),
+              rs.getDate(6));
+      posts.add(post2);
+    }
+    DBConn.closeDB(conn, pstm, rs);
+    return posts;
+  }
+
+  @Override
+  public List<Post> findAll() throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    ResultSet rs;
+    List<Post> posts = new ArrayList<>();
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement("select * from post");
+    rs = pstm.executeQuery();
+    while (rs.next()) {
+      Post post2 =
+          new Post(
+              rs.getInt(1),
+              rs.getString(2),
+              rs.getString(3),
+              rs.getString(4),
+              rs.getString(5),
+              rs.getDate(6));
+      posts.add(post2);
+    }
+    DBConn.closeDB(conn, pstm, rs);
+    return posts;
+  }
+
+  @Override
+  public void update(Post post) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement(UPDATE_SQL);
+    pstm.setString(1, post.getTitle());
+    pstm.setString(2, post.getAuthor());
+    pstm.setString(3, post.getType());
+    pstm.setString(4, post.getContent());
+    pstm.setInt(5, post.getId());
+    int rowCount = pstm.executeUpdate();
+    if (rowCount == 0) {
+      throw new SQLException("Update Error:Post id:" + post.getId());
+    }
+    DBConn.closeDB(conn, pstm, null);
+  }
+}

src/main/java/com/service/UserDAO.java

@@ -0,0 +1,164 @@
+package com.service;
+
+import com.bean.User;
+import com.dao.IUserDAO;
+import com.db.DBConn;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+
+public class UserDAO implements IUserDAO {
+  protected static final String FIELDS_INSERT = "uid, name, passwd, sex, rtime";
+  protected static String INSERT_SQL = "insert into user (" + FIELDS_INSERT+ ")" +"values(0,?,?,?,NOW())";
+  protected static String SELECT_SQL = "select " + FIELDS_INSERT + " from user where uid=?";
+  protected static String SELECT_SQL2 = "select " + FIELDS_INSERT + " from user where name=?";
+  protected static String UPDATE_SQL = "update user set" + " name=?,passwd=?,sex=? where uid=?";
+  protected static String DELETE_SQL = "delete from user where uid=?";
+
+
+  @Override
+  public void create(User user) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    conn = DBConn.getDBconnection();
+
+    assert conn != null;
+    pstm = conn.prepareStatement(INSERT_SQL);
+      pstm.setString(1, user.getName());
+      pstm.setString(2,user.getPasswd());
+      pstm.setString(3,user.getSex());
+      pstm.executeUpdate();
+
+    DBConn.closeDB(conn,pstm,null);
+  }
+
+  @Override
+  public void remove(User user) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement(DELETE_SQL);
+      pstm.setInt(1,user.getUid());
+      pstm.executeUpdate();
+      DBConn.closeDB(conn,pstm,null);
+  }
+
+  @Override
+  public User findById(User user) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    ResultSet rs;
+    User user2 = null;
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement(SELECT_SQL);
+    pstm.setInt(1,user.getUid());
+    rs = pstm.executeQuery();
+    if (rs.next()){
+      user2 = new User(rs.getInt(1),rs.getString(2),rs.getString(3),rs.getString(4),rs.getDate(5));
+    }
+    DBConn.closeDB(conn,pstm,rs);
+    return user2;
+  }
+
+  @Override
+  public User findByName(User user) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    ResultSet rs;
+    User user2 = null;
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement(SELECT_SQL2);
+      pstm.setString(1,user.getName());
+      rs = pstm.executeQuery();
+      if (rs.next()){
+        user2 = new User(rs.getInt(1),rs.getString(2),rs.getString(3),rs.getString(4),rs.getDate(5));
+      }
+    DBConn.closeDB(conn,pstm,rs);
+    return user2;
+  }
+
+  @Override
+  public List<User> findAll() throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    ResultSet rs;
+    List<User> user = new ArrayList<>();
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement("select * from user");
+      rs = pstm.executeQuery();
+      while (rs.next()){
+        User user1 = new User(rs.getInt(1),rs.getString(2),rs.getString(3),rs.getString(4),rs.getDate(5));
+        user.add(user1);
+      }
+    DBConn.closeDB(conn,pstm,rs);
+    return user;
+  }
+
+  @Override
+  public void update(User user) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement(UPDATE_SQL);
+    pstm.setString(1,user.getName());
+    pstm.setString(2,user.getPasswd());
+    pstm.setString(3,user.getSex());
+    pstm.setInt(4,user.getUid());
+      int rowCount = pstm.executeUpdate();
+      if (rowCount == 0) {
+        throw new SQLException("Update Error:User uid:" + user.getUid());
+      }
+    DBConn.closeDB(conn,pstm,null);
+  }
+
+  @Override
+  public int check(User user) throws Exception{
+    Connection conn;
+    PreparedStatement pstm;
+    ResultSet rs;
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement("select name,passwd from User where name=?");
+    pstm.setString(1,user.getName());
+    rs = pstm.executeQuery();
+    User user1 = new User();
+    if (rs.next()){
+      user1.setName(rs.getString(1));
+      user1.setPasswd(rs.getString(2));
+    }
+    if (!user.getName().equals(user1.getName())) {
+      return -1; // 用户名不存在返回-1
+    } else {
+      if (!user.getPasswd().equals(user1.getPasswd())) {
+        return 0; // 密码不正确返回0
+      } else {
+        return 1; // 正确返回1
+      }
+    }
+  }
+
+  public boolean check(String name) throws Exception {
+    Connection conn;
+    PreparedStatement pstm;
+    ResultSet rs;
+    conn = DBConn.getDBconnection();
+    assert conn != null;
+    pstm = conn.prepareStatement("select name from User where name=?");
+    pstm.setString(1,name);
+    rs = pstm.executeQuery();
+    User user1 = new User();
+    if (rs.next()){
+      user1.setName(rs.getString(1));
+    }
+    return !name.equals(user1.getName()); // 用户名存在返回0
+  }
+}

src/main/webapp/WEB-INF/web.xml

@@ -0,0 +1,6 @@
+<!DOCTYPE web-app PUBLIC
+  "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
+  "http://java.sun.com/dtd/web-app_2_3.dtd">
+<web-app>
+  <display-name>Archetype Created Web Application</display-name>
+</web-app>

src/main/webapp/about.html

@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+
+<html lang="zh-CN">
+
+<head>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <link rel="stylesheet" href="css/universal.css" />
+  <link rel="stylesheet" href="css/about.css" />
+  <title>FORUM</title>
+  <link rel="icon" href="images/moon.png" type="image/x-icon" />
+</head>
+
+<body>
+<div class="header">
+  <h1>FORUM</h1>
+  <p>Everyone loves something.</p>
+</div>
+
+<div class="topnav">
+  <ul>
+    <li><a href="home.jsp">首页</a></li>
+    <li><a href="mine.jsp">我的</a></li>
+    <li><a href="publish.html">发帖</a></li>
+    <li><a href="home_login.jsp">账号</a></li>
+    <li><a href="about.html">关于</a></li>
+  </ul>
+</div>
+
+<div class="row">
+  <div class="card">
+    <h3>关于</h3>
+    <br>
+    <h2>🎈可以在论坛内出个人二手物品，但是不允许带货哦！<br>
+      🎈广告、兼职信息需要先找管理员审核，未经审核的广告或兼职帖子直接删除！<br>
+      多次违规提醒不听的将会禁言提醒甚至封禁账号<br>
+      希望大家可以遵守，方便别人的同时，也方便自己哟~
+      </h2>
+  </div>
+</div>
+
+<div class="footer">
+  <h2>Everyone loves something.</h2>
+</div>
+
+</body>
+
+</html>

src/main/webapp/css/about.css

@@ -0,0 +1,19 @@
+.row .card {
+  min-height: 700px;
+}
+
+.row h2 {
+  text-align: center;
+  margin-top: 200px;
+}
+
+@keyframes cardContainerLoad {
+  from {
+    opacity: 0;
+    transform: translate3d(0, 1%, 0);
+  }
+  to {
+    opacity: 1;
+    transform: none;
+  }
+}

src/main/webapp/css/home.css

@@ -0,0 +1,47 @@
+.row input {
+  display: none;
+}
+
+/* Create two unequal columns that floats next to each other */
+/* Left column */
+.leftcolumn {
+  float: left;
+  width: 34%;
+}
+
+.leftcolumn .card {
+  min-height: 700px;
+}
+
+/* Right column */
+.rightcolumn {
+  float: left;
+  width: 66%;
+  padding-left: 20px;
+}
+
+.rightcolumn .card {
+  min-height: 340px;
+}
+
+@keyframes cardContainerLoad {
+  from {
+    opacity: 0;
+    transform: translate3d(0, 10%, 0);
+  }
+  to {
+    opacity: 1;
+    transform: none;
+  }
+}
+
+/* Responsive layout - when the screen is less than
+ 800px wide, make the two columns stack on top of 
+ each other instead of next to each other */
+@media screen and (max-width: 800px) {
+  .leftcolumn,
+  .rightcolumn {
+    width: 100%;
+    padding: 0;
+  }
+}

src/main/webapp/css/home_login.css

@@ -0,0 +1,11 @@
+.row {
+  text-align: center;
+}
+
+.row button {
+  margin: 20px;
+  width: 100px;
+  height: 50px;
+  font-size: 18px;
+
+}

src/main/webapp/css/index.css

@@ -0,0 +1,35 @@
+.row {
+  text-align: center;
+}
+
+.login {
+  text-align: center;
+  height: 180px;
+  width: 350px;
+  margin: auto;
+  margin-top: 150px;
+  margin-bottom: 20px;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  border: 1px solid black;
+  border-radius: 0.5em;
+}
+
+.login input {
+  float: right;
+  margin-right: 20px;
+  width: 200px;
+  height: 25px;
+}
+
+.login button {
+  margin-top: 15px;
+  width: 180px;
+  height: 30px;
+}
+
+.row a {
+  color: #333;
+}

src/main/webapp/css/mine.css

@@ -0,0 +1,3 @@
+.row input {
+  display: none;
+}

src/main/webapp/css/post.css

@@ -0,0 +1,105 @@
+.row {
+  animation: cardContainerLoad 2s;
+}
+
+.row .card {
+  min-height: auto;
+  animation: none;
+}
+
+.row .comment {
+  margin-top: 0;
+}
+
+.row hr {
+  margin-left: 20px;
+  margin-right: 20px;
+}
+
+.comment .title {
+  position: relative;
+  float: left;
+  height: 45px;
+  width: 100%;
+  background-color: white;
+}
+
+.comment .title .text {
+  float: left;
+  height: 30px;
+  width: 80%;
+  margin-right: 0;
+}
+
+.comment .title .btn {
+  float: right;
+  margin: 5px;
+  margin-right: 20px;
+}
+
+.comment .title .btn button {
+  height: 30px;
+  width: 30px;
+  font-size: 20px;
+}
+
+.comment .title h3 {
+  padding-left: 20px;
+  background-color: white;
+  text-align: left;
+  color: #333;
+}
+
+.comment .cinput {
+  position: relative;
+  margin-left: 20px;
+  margin-right: 20px;
+}
+
+.comment .cinput input {
+  float: left;
+  height: 40px;
+  width: 80%;
+}
+
+.comment .cinput .btn {
+  float: right;
+  height: 40px;
+  width: 20%;
+}
+
+.comment .cinput .btn button {
+  margin-left: 20px;
+  height: 40px;
+  width: 50%;
+}
+
+.comment .comments {
+  margin: 20px;
+}
+
+.ifmt {
+  padding-top: 3px;
+  text-align: center;
+}
+
+.ifmt .author {
+  float: left;
+  width: 33%;
+}
+
+.ifmt .type {
+  float: left;
+  width: 33%;
+}
+
+.ifmt .date {
+  float: left;
+  width: 33%;
+}
+
+.content {
+  padding: 20px;
+  padding-top: 50px;
+  font-size: 18px;
+}

src/main/webapp/css/publish.css

@@ -0,0 +1,32 @@
+.edit {
+  margin: 20px;
+  color: #333;
+}
+
+.edit input {
+  margin-left: 10px;
+}
+
+.edit input[type="text"] {
+  height: 2em;
+  width: 20em;
+}
+
+.edit textarea {
+  margin-left: 8%;
+  margin-right: 10%;
+  resize: none;
+  height: 20em;
+  width: 80%;
+  padding: 10px;
+  font-size: 17px;
+}
+
+.edit button {
+  margin-top: 30px;
+  margin-left: 8%;
+  margin-right: 10%;
+  width: 80%;
+  height: 40px;
+  font-size: 18px;
+}

src/main/webapp/css/signup.css

@@ -0,0 +1,3 @@
+.login {
+  height: 200px;
+}

src/main/webapp/css/universal.css

@@ -0,0 +1,134 @@
+* {
+  padding: 0;
+  margin: 0;
+  box-sizing: border-box;
+}
+
+body {
+  height: 100%;
+  font-family: Arial;
+  padding: 10px;
+  background-image: url(../images/image01.jpg);
+  background-size: cover;
+  padding-left: 20%;
+  padding-right: 20%;
+  /* background: #f1f1f1; */
+}
+
+/* Header/Blog Title */
+.header {
+  padding: 18px;
+  text-align: center;
+  /* background-image: url(../images/image01.jpg); */
+  background-size: cover;
+}
+
+.header h1 {
+  font-size: 50px;
+  font-weight: bolder;
+}
+
+/* Style the top navigation bar */
+.topnav {
+  overflow: hidden;
+  background-color: #333;
+  position: sticky;
+  top: 0;
+  box-shadow: 0 1px 1px 0 rgba(0, 0, 0, 0.2), 0 1px 1px 0 rgba(0, 0, 0, 0.19);
+  text-align: center;
+}
+
+.topnav ul {
+  list-style-type: none;
+  overflow: hidden;
+}
+
+.topnav li {
+  padding-left: 10px;
+  padding-right: 10px;
+  display: inline-block;
+}
+
+/* Style the topnav links */
+.topnav a {
+  float: left;
+  display: block;
+  font-size: 20px;
+  font-weight: bolder;
+  color: #f2f2f2;
+  text-align: center;
+  padding: 14px 16px;
+  text-decoration: none;
+}
+
+/* Change color on hover */
+.topnav a:hover {
+  background-color: #ddd;
+  color: black;
+}
+
+/* Responsive layout - when the screen is less than 
+400px wide, make the navigation links stack on top 
+of each other instead of next to each other */
+@media screen and (max-width: 400px) {
+  .topnav a {
+    float: none;
+    width: 100%;
+  }
+}
+
+.row .posta {
+  padding-top: 3%;
+  padding-left: 3%;
+}
+
+.row .posta a {
+  text-decoration: none;
+  color: #333;
+  font-weight: bolder;
+}
+
+/* Clear floats after the columns */
+.row:after {
+  content: "";
+  display: table;
+  clear: both;
+}
+
+/* Add a card effect for articles */
+.card {
+  background-color: white;
+  /* padding: 20px; */
+  margin-top: 20px;
+  box-shadow: 0 4px 4px 0 rgba(0, 0, 0, 0.2), 0 4px 4px 0 rgba(0, 0, 0, 0.19);
+  animation: cardContainerLoad 2s;
+}
+
+.card h3 {
+  padding: 10px;
+  background-color: #333;
+  text-align: center;
+  color: white;
+}
+
+/* Footer */
+.footer {
+  padding: 10px;
+  text-align: center;
+  color: #333;
+  margin-top: 20px;
+}
+
+button {
+  background-color: #333;
+  border: none;
+  cursor: pointer;
+  text-align: center;
+  color: white;
+  box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.2), 0 2px 4px 0 rgba(0, 0, 0, 0.19);
+}
+
+button:hover {
+  background-color: #ddd;
+  color: black;
+}

src/main/webapp/home.jsp

@@ -0,0 +1,122 @@
+<%@ page import="com.dao.IPostDAO" %>
+<%@ page import="com.bean.Post" %>
+<%@ page import="java.util.List" %>
+<%@ page import="com.service.PostDAO" %>
+
+<%--
+  Created by IntelliJ IDEA.
+  User: yuex1ng
+  Date: 2023/12/21
+  Time: 11:24
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" %>
+<!DOCTYPE html>
+
+<html lang="zh-CN">
+
+<head>
+  <meta http-equiv="Expires" content="0">
+  <meta http-equiv="kiben" content="no-cache">
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <link rel="stylesheet" href="css/universal.css" />
+  <link rel="stylesheet" href="css/home.css" />
+  <title>FORUM</title>
+  <link rel="icon" href="images/moon.png" type="image/x-icon" />
+  <link rel="shortcut icon" href="images/moon.png" type="image/x-icon" />
+</head>
+
+<body>
+<div class="header">
+  <h1>FORUM</h1>
+  <p>Everyone loves something.</p>
+</div>
+
+<div class="topnav">
+  <ul>
+    <li><a href="home.jsp">首页</a></li>
+    <li><a href="mine.jsp">我的</a></li>
+    <li><a href="publish.html">发帖</a></li>
+    <li><a href="home_login.jsp">账号</a></li>
+    <li><a href="about.html">关于</a></li>
+  </ul>
+</div>
+
+<div class="row">
+  <div class="leftcolumn">
+    <div class="card">
+      <h3>表白墙</h3>
+      <br>
+      <%
+        IPostDAO iPostDAO = new PostDAO();
+        List<Post> posts = null;
+        try {
+          posts = iPostDAO.findByType("表白墙");
+        } catch (Exception e) {
+          e.printStackTrace();
+        }
+        assert posts != null;
+        for (Post post : posts) { %>
+      <form action="./post.jsp" method="post" id="form<%=post.getId()%>">
+        <label>
+          <input type="text" name="id" value="<%=post.getId()%>">
+        </label>
+        <div class="posta"><a href="" onclick="document.getElementById('form<%=post.getId()%>').submit();return false;"><%=post.getTitle()%></a></div>
+      </form>
+      <%
+        }
+      %>
+    </div>
+  </div>
+  <div class="rightcolumn">
+    <div class="card">
+      <h3>学习讨论</h3>
+      <br>
+      <%
+        try {
+          posts = iPostDAO.findByType("学习讨论");
+        } catch (Exception e) {
+          e.printStackTrace();
+        }
+        assert posts != null;
+        for (Post post : posts) { %>
+      <form action="./post.jsp" method="post" id="form<%=post.getId()%>">
+        <label>
+          <input type="text" name="id" value="<%=post.getId()%>">
+        </label>
+        <div class="posta"><a href="" onclick="document.getElementById('form<%=post.getId()%>').submit();return false;"><%=post.getTitle()%></a></div>
+      </form>
+      <%
+        }
+      %>
+    </div>
+    <div class="card">
+      <h3>校园生活</h3>
+      <br>
+      <%
+        try {
+          posts = iPostDAO.findByType("校园生活");
+        } catch (Exception e) {
+          e.printStackTrace();
+        }
+        assert posts != null;
+        for (Post post : posts) { %>
+      <form action="./post.jsp" method="post" id="form<%=post.getId()%>">
+        <label>
+          <input type="text" name="id" value="<%=post.getId()%>">
+        </label>
+        <div class="posta"><a href="" onclick="document.getElementById('form<%=post.getId()%>').submit();return false;"><%=post.getTitle()%></a></div>
+      </form>
+      <%
+        }
+      %>
+    </div>
+  </div>
+</div>
+
+<div class="footer">
+  <h2>Everyone loves something.</h2>
+</div>
+
+</body>

src/main/webapp/home_login.jsp

@@ -0,0 +1,55 @@
+<%--
+  Created by IntelliJ IDEA.
+  User: yuex1ng
+  Date: 2023/12/21
+  Time: 11:34
+  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" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <link rel="stylesheet" href="css/universal.css" />
+  <link rel="stylesheet" href="css/about.css" />
+  <link rel="stylesheet" href="css/home_login.css" />
+  <title>FORUM</title>
+  <link rel="icon" href="images/moon.png" type="image/x-icon" />
+</head>
+
+<body>
+<div class="header">
+  <h1>FORUM</h1>
+  <p>Everyone loves something.</p>
+</div>
+
+<div class="topnav">
+  <ul>
+    <li><a href="home.jsp">首页</a></li>
+    <li><a href="mine.jsp">我的</a></li>
+    <li><a href="publish.html">发帖</a></li>
+    <li><a href="home_login.jsp">账号</a></li>
+    <li><a href="about.html">关于</a></li>
+  </ul>
+</div>
+
+<div class="row">
+  <div class="card">
+    <h3>当前登录</h3>
+    <br>
+    <h2><%=session.getAttribute("username_session")%>, 欢迎您</h2>
+    <button onclick="window.location.href='./index.html'">登出</button>
+  </div>
+</div>
+
+<div class="footer">
+  <h2>Everyone loves something.</h2>
+</div>
+
+</body>
+
+</html>

src/main/webapp/index.html

@@ -0,0 +1,56 @@
+<!DOCTYPE html>
+
+<html lang="zh-CN">
+
+<head>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <link rel="stylesheet" href="css/universal.css" />
+  <link rel="stylesheet" href="css/about.css" />
+  <link rel="stylesheet" href="css/index.css" />
+  <title>FORUM</title>
+  <link rel="icon" href="images/moon.png" type="image/x-icon" />
+</head>
+
+<body>
+<div class="header">
+  <h1>FORUM</h1>
+  <p>Everyone loves something.</p>
+</div>
+
+<div class="topnav">
+  <ul>
+    <li><a href="#">首页</a></li>
+    <li><a href="#">我的</a></li>
+    <li><a href="#">发帖</a></li>
+    <li><a href="#">账号</a></li>
+    <li><a href="#">关于</a></li>
+  </ul>
+</div>
+
+<div class="row">
+  <div class="card">
+    <h3>登录</h3>
+    <br>
+    <div class="login">
+      <form action="loginCheck" method="post">
+        <br>
+        <label>用户名：<input type="text" name="username"></label>
+        <br><br>
+        <label>密 码：<input type="password" name="userpwd"></label>
+        <br><br>
+        <button type="submit">登录</button>
+      </form>
+    </div>
+    <br>
+    <a href="./signup.html">新用户注册</a>
+  </div>
+</div>
+
+<div class="footer">
+  <h2>Everyone loves something.</h2>
+</div>
+
+</body>
+
+</html>

src/main/webapp/info.jsp

@@ -0,0 +1,18 @@
+<%--
+  Created by IntelliJ IDEA.
+  User: yuex1ng
+  Date: 2023/12/21
+  Time: 12:51
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+  <title>Info</title>
+</head>
+<body>
+<h1><%=request.getAttribute("outputMessage")%></h1>
+<h1><%=session.getAttribute("session")%></h1>
+<h1></h1>
+</body>
+</html>

src/main/webapp/js/ajax.js

@@ -0,0 +1,45 @@
+//声明XMLHttpRequest对象
+var httpRequest = null;
+
+//创建XMLHttpRequest对象实例的方法
+function createXHR() {
+  if (window.XMLHttpRequest) {
+    httpRequest = new XMLHttpRequest();
+  } else if (window.ActiveXObject) {
+    try {
+      httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
+    } catch (e) {
+      try {
+        httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
+      } catch (e) {
+        httpRequest = null;
+      }
+    }
+  }
+  if (!httpRequest) {
+    alert("fail to create httpRequest");
+  }
+}
+
+//发送客户端的请求，该方法有4个参数
+//参数url设置要连接的URL，建立到服务器的连接并执行
+//参数params为从Web表单中获取需要发送的数据集合
+//参数method取值为POST或GET
+//参数handler为指定的响应函数（服务器在完成后要运行的回调函数）
+function sendRequest (url, params, method, handler) {
+  createXHR();
+  if (!httpRequest) {
+    return false;
+  }
+  httpRequest.onreadystatechange = handler;
+  if (method == "GET") {
+    httpRequest.open(method, url + "?" + params, true);
+    httpRequest.send(null);
+  }
+  if (method == "POST") {
+    httpRequest.open(method, url, true);
+    httpRequest.setRequestHeader("Content-type",
+        "application/x-www-form-urlencoded");
+    httpRequest.send(params);
+  }
+}

src/main/webapp/js/post.js

@@ -0,0 +1,7 @@
+function input_show() {
+  if(document.getElementById("ci").style.display == "none") {
+    document.getElementById("ci").style.display = "block";
+  }else{
+    document.getElementById("ci").style.display = "none";
+  }
+}

src/main/webapp/mine.jsp

@@ -0,0 +1,78 @@
+<%@ page import="com.dao.IPostDAO" %>
+<%@ page import="com.service.PostDAO" %>
+<%@ page import="java.util.List" %>
+<%@ page import="com.bean.Post" %>
+<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
+<%--
+  Created by IntelliJ IDEA.
+  User: yuex1ng
+  Date: 2023/12/22
+  Time: 13:31
+  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" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <link rel="stylesheet" href="css/universal.css" />
+  <link rel="stylesheet" href="css/about.css" />
+  <link rel="stylesheet" href="css/mine.css" />
+  <title>FORUM</title>
+  <link rel="icon" href="images/moon.png" type="image/x-icon" />
+</head>
+
+<body>
+<div class="header">
+  <h1>FORUM</h1>
+  <p>Everyone loves something.</p>
+</div>
+
+<div class="topnav">
+  <ul>
+    <li><a href="home.jsp">首页</a></li>
+    <li><a href="mine.jsp">我的</a></li>
+    <li><a href="publish.html">发帖</a></li>
+    <li><a href="home_login.jsp">账号</a></li>
+    <li><a href="about.html">关于</a></li>
+  </ul>
+</div>
+
+<div class="row">
+  <div class="card">
+    <h3>我的贴子</h3>
+    <br>
+    <%
+      String author = (String) session.getAttribute("username_session");
+      IPostDAO iPostDAO = new PostDAO();
+      List<Post> posts = null;
+      try {
+        posts = iPostDAO.findByAuthor(author);
+      } catch (Exception e) {
+        e.printStackTrace();
+      }
+      assert posts != null;
+      for (Post post : posts) { %>
+    <form action="./post.jsp" method="post" id="form<%=post.getId()%>">
+      <label>
+        <input type="text" name="id" value="<%=post.getId()%>">
+      </label>
+      <div class="posta"><a href="" onclick="document.getElementById('form<%=post.getId()%>').submit();return false;"><%=post.getTitle()%></a></div>
+    </form>
+    <%
+      }
+    %>
+  </div>
+</div>
+
+<div class="footer">
+  <h2>Everyone loves something.</h2>
+</div>
+
+</body>
+
+</html>

src/main/webapp/post.jsp

@@ -0,0 +1,126 @@
+<%@ page import="com.dao.IPostDAO" %>
+<%@ page import="com.service.PostDAO" %>
+<%@ page import="com.bean.Post" %>
+<%@ page import="com.service.CommentDAO" %>
+<%@ page import="com.dao.iCommentDAO" %>
+<%@ page import="java.util.List" %>
+<%@ page import="com.bean.Comment" %>
+<%--
+  Created by IntelliJ IDEA.
+  User: yuex1ng
+  Date: 2023/12/23
+  Time: 14:52
+  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" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <link rel="stylesheet" href="css/universal.css" />
+  <link rel="stylesheet" href="css/about.css" />
+  <link rel="stylesheet" href="css/post.css" />
+  <script src="js/post.js"></script>
+  <title>FORUM</title>
+  <link rel="icon" href="images/moon.png" type="image/x-icon" />
+</head>
+
+<body>
+<div class="header">
+  <h1>FORUM</h1>
+  <p>Everyone loves something.</p>
+</div>
+
+<div class="topnav">
+  <ul>
+    <li><a href="home.jsp">首页</a></li>
+    <li><a href="mine.jsp">我的</a></li>
+    <li><a href="publish.html">发帖</a></li>
+    <li><a href="home_login.jsp">账号</a></li>
+    <li><a href="about.html">关于</a></li>
+  </ul>
+</div>
+
+<div class="row">
+  <div class="card">
+    <%
+      int id = Integer.parseInt(request.getParameter("id"));
+      IPostDAO iPostDAO = new PostDAO();
+      Post post = new Post();
+      post.setId(id);
+      Post post1 = null;
+      try {
+        post1 = iPostDAO.findById(post);
+      } catch (Exception e) {
+        e.printStackTrace();
+      }
+      assert post1 != null;%>
+    <h3><%=post1.getTitle()%></h3>
+    <div class="ifmt">
+      <div class="author">
+        <p>作者：<%=post1.getAuthor()%></p>
+      </div>
+      <div class="type">
+        <p>类型：<%=post1.getType()%></p>
+      </div>
+      <div class="date">
+        <p>时间：<%=post1.getDate()%></p>
+      </div>
+    </div>
+    <div class="content">
+      <%=post1.getContent()%>
+    </div>
+  </div>
+
+  <div class="card comment">
+    <hr>
+    <div class="title">
+      <div class="text">
+        <h3>评论</h3>
+      </div>
+      <div class="btn">
+        <button onclick="input_show()">+</button>
+      </div>
+    </div><br>
+    <div class="cinput" id="ci" style="display: none;">
+      <form action="CommentAdd" method="post">
+        <input type="text" id="content" name="content">
+        <input style="display: none" type="text" id="post_id" name="post_id" value="<%=post1.getId()%>">
+        <div class="btn">
+          <button type="submit">评论</button>
+        </div>
+      </form>
+    </div>
+    <br>
+    <div class="comments">
+      <%
+        iCommentDAO icommentdao = new CommentDAO();
+        List<Comment> comments = null;
+        try {
+          comments =  icommentdao.findByPostId(post1);
+        } catch (Exception e) {
+          e.printStackTrace();
+        }
+        assert comments != null;
+        for (Comment comment : comments) {
+          %>
+      <h5><%=comment.getAuthor()%> : <%=comment.getContent()%></h5>
+      <br>
+      <%
+        }
+      %>
+    </div>
+  </div>
+
+</div>
+
+<div class="footer">
+  <h2>Everyone loves something.</h2>
+</div>
+
+</body>
+
+</html>

src/main/webapp/publish.html

@@ -0,0 +1,64 @@
+<!DOCTYPE html>
+
+<html lang="zh-CN">
+
+<head>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <link rel="stylesheet" href="css/universal.css" />
+  <link rel="stylesheet" href="css/about.css" />
+  <link rel="stylesheet" href="css/publish.css" />
+  <title>FORUM</title>
+  <link rel="icon" href="images/moon.png" type="image/x-icon" />
+</head>
+
+<body>
+<div class="header">
+  <h1>FORUM</h1>
+  <p>Everyone loves something.</p>
+</div>
+
+<div class="topnav">
+  <ul>
+    <li><a href="home.jsp">首页</a></li>
+    <li><a href="mine.jsp">我的</a></li>
+    <li><a href="publish.html">发帖</a></li>
+    <li><a href="home_login.jsp">账号</a></li>
+    <li><a href="about.html">关于</a></li>
+  </ul>
+</div>
+
+<div class="row">
+  <div class="card">
+    <h3>编辑</h3>
+    <br>
+    <div class="edit">
+      <form action="/PostWrite" method="POST">
+        <br>
+        <label>贴子标题：<input type="text" name="title"></label>
+        <br><br>
+        <label>贴子类型：
+          <input type="radio" id="new" name="ntype" value="学习讨论">
+          <label for="new">学习讨论</label>
+          <input type="radio" id="money" name="ntype" value="校园生活">
+          <label for="money">校园生活</label>
+          <input type="radio" id="intnl" name="ntype" value="表白墙">
+          <label for="intnl">表白墙</label>
+        </label>
+        <br><br>
+        <label>贴子内容：<br>
+          <textarea rows="10" name="content"></textarea>
+        </label>
+        <button type="submit">发布</button>
+      </form>
+    </div>
+  </div>
+</div>
+
+<div class="footer">
+  <h2>Everyone loves something.</h2>
+</div>
+
+</body>
+
+</html>

src/main/webapp/signup.html

@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+
+<html lang="zh-CN">
+
+<head>
+  <meta charset="utf-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <link rel="stylesheet" href="css/universal.css" />
+  <link rel="stylesheet" href="css/about.css" />
+  <link rel="stylesheet" href="css/index.css" />
+  <link rel="stylesheet" href="css/signup.css" />
+  <title>FORUM</title>
+  <link rel="icon" href="images/moon.png" type="image/x-icon" />
+</head>
+
+<body>
+<div class="header">
+  <h1>FORUM</h1>
+  <p>Everyone loves something.</p>
+</div>
+
+<div class="topnav">
+  <ul>
+    <li><a href="#">首页</a></li>
+    <li><a href="#">我的</a></li>
+    <li><a href="#">发帖</a></li>
+    <li><a href="#">账号</a></li>
+    <li><a href="#">关于</a></li>
+  </ul>
+</div>
+
+<div class="row">
+  <div class="card">
+    <h3>注册</h3>
+    <br>
+    <div class="login">
+      <form action="SignCheck" method="post">
+        <br>
+        <label>用户名：<input type="text" name="username"></label>
+        <br><br>
+        <label>密 码：<input type="password" name="userpwd"></label>
+        <br><br>
+        <label>重 复：<input type="password" name="reuserpwd"></label>
+        <br><br>
+        <button type="submit">注册</button>
+      </form>
+    </div>
+    <br>
+    <a href="./index.html">登录界面</a>
+  </div>
+</div>
+
+<div class="footer">
+  <h2>Everyone loves something.</h2>
+</div>
+
+</body>
+
+</html>