动态网站项目（Dynamic Web Project）CRUD(增删改查)功能的实现(mvc(五层架构)+jdbc+servlet+tomcat7.0+jdk1.8)，前端使用JSP+JSTL+EL组合

代码分享链接

https://pan.baidu.com/s/1UM0grvpttHW9idisiqa6rA 提取码：hx7c

图示

项目结构

1.SelectAllUser.jsp

 <%@ page language="java" contentType="text/html; charset=UTF-8"

     pageEncoding="UTF-8"%>

 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

 <html>

 <head>

 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

 <title>Insert title here</title>

 </head>

 <body>

     <a href="SelectAllUserServlet">查询所有用户</a>

 </body>

 </html>

2.AddUser.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<a href="Add.jsp">增加用户</a>
<table border="1px">
<tr>
<td>用户ID</td>
<td>用户姓名</td>
<td>用户密码</td>
<td>用户昵称</td>
<td>用户性别</td>
<td>用户年龄</td>
<td>用户头像</td>
<td>操作</td>
</tr>
<c:forEach var="xyz" items="${requestScope.user }">
<tr>
<td>${xyz.userid }</td>
<td>${xyz.username }</td>
<td>${xyz.password }</td>
<td>${xyz.nikename }</td>
<td>${xyz.sex }</td>
<td>${xyz.age }</td>
<td><img src="${xyz.image }" alt="图片加载失败" height="50px" weight="50px"/></td>
<td>
<a href="UpdateSelectUserByIdServlet?userid=${xyz.userid }">修改</a>
<a href="DeleteUserServlet?userid=${xyz.userid }">删除</a>
</td>
</tr>
</c:forEach>
</table>

一共${num }页     
<a href=""#>首页</a>
<a href=""#>上一页</a>
<a href=""#>下一页</a>
<a href=""#>尾页</a>

</body>
</html>

3.Add.jsp

 <%@ page language="java" contentType="text/html; charset=UTF-8"

     pageEncoding="UTF-8"%>

 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

 <html>

 <head>

 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

 <title>Insert title here</title>

 </head>

 <body>

     <form action="AddUserServle" method="post">

         用户名<input type="text" name="username"><br>

         密码<input type="text" name="password"><br>

         昵称<input type="text" name="nikename"><br>

         性别<input type="text" name="sex"><br>

         年龄<input type="text" name="age"><br>

         头像<input type="file" name="image"><br>

         <input type="submit" value="提交">

     </form>

 </body>

 </html>

4.UpdateUser.jsp

 <%@ page language="java" contentType="text/html; charset=UTF-8"

     pageEncoding="UTF-8"%>

 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

 <html>

 <head>

 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

 <title>Insert title here</title>

 </head>

 <body>

     <form action="UpdateUserServlet" method="post" >

         用户id:${user.userid }

         <input type="hidden" name="userid" value="${user.userid }"><br>

         用户名<input type="text" name="username" value="${user.username }"><br>

         密码<input type="text" name="password" value="${user.password }"><br>

         昵称<input type="text" name="nikename" value="${user.nikename }"><br>

         性别<input type="text" name="sex" value="${user.sex }"><br>

         年龄<input type="text" name="age" value="${user.age }"><br>

         头像<input type="file" name="image" value="${user.image }"><br>

         <input type="submit" value="提交">

     </form>

 </body>

 </html>

5.(com.icss.vo)User.java

 /**

   * <p>Title: User.java</p>

 　 * <p>Description: </p>

 　 * <p>Copyright: Copyright (c) 2020</p>

 　 * <p>Company: </p>

 　 * @author liuxin

 　 * @date 2020年3月27日

 　 * @version 1.0

  */

 package com.icss.vo;

 /**

  * <p>Title: User</p>

 　 * <p>Description: </p>

 　 * @author liuxin

 　 * @date 2020年3月27日

  */

 public class User {

     //数据封装

     private int userid;

     private String username;

     private String password;

     private String nikename;

     private String sex;

     private int age;

     private String image;

     /**

      * @return the userid

      */

     public int getUserid() {

         return userid;

     }

     /**

      * @param userid the userid to set

      */

     public void setUserid(int userid) {

         this.userid = userid;

     }

     /**

      * @return the username

      */

     public String getUsername() {

         return username;

     }

     /**

      * @param username the username to set

      */

     public void setUsername(String username) {

         this.username = username;

     }

     /**

      * @return the password

      */

     public String getPassword() {

         return password;

     }

     /**

      * @param password the password to set

      */

     public void setPassword(String password) {

         this.password = password;

     }

     /**

      * @return the nikename

      */

     public String getNikename() {

         return nikename;

     }

     /**

      * @param nikename the nikename to set

      */

     public void setNikename(String nikename) {

         this.nikename = nikename;

     }

     /**

      * @return the sex

      */

     public String getSex() {

         return sex;

     }

     /**

      * @param sex the sex to set

      */

     public void setSex(String sex) {

         this.sex = sex;

     }

     /**

      * @return the age

      */

     public int getAge() {

         return age;

     }

     /**

      * @param age the age to set

      */

     public void setAge(int age) {

         this.age = age;

     }

     /**

      * @return the image

      */

     public String getImage() {

         return image;

     }

     /**

      * @param image the image to set

      */

     public void setImage(String image) {

         this.image = image;

     }

 }

6.(com.icss.util)DBUtil.java

 package com.icss.util;

 import java.sql.Connection;

 import java.sql.DriverManager;

 import java.sql.SQLException;

 public class DBUtil {

     public static Connection connection;

     public static Connection getConnection() throws ClassNotFoundException, SQLException{

         Class.forName("oracle.jdbc.driver.OracleDriver");

         Connection connection = DriverManager.getConnection

                 ("jdbc:oracle:thin:@localhost:1521:XE","数据库名","数据库密码");

         return connection;

     }

 }

7.(com.icss.dao)UserDao.java

 /**

   * <p>Title: UserDao.java</p>

 　 * <p>Description: </p>

 　 * <p>Copyright: Copyright (c) 2020</p>

 　 * <p>Company: </p>

 　 * @author liuxin

 　 * @date 2020年3月27日

 　 * @version 1.0

  */

 package com.icss.dao;

 import java.sql.PreparedStatement;

 import java.sql.ResultSet;

 import java.sql.SQLException;

 import java.util.ArrayList;

 import org.apache.tomcat.dbcp.dbcp.DbcpException;

 import com.icss.util.DBUtil;

 import com.icss.vo.User;

 import javafx.css.PseudoClass;

 /**

  * <p>Title: UserDao</p>

 　 * <p>Description: </p>

 　 * @author liuxin

 　 * @date 2020年3月27日

  */

 public class UserDao {

     //查询所有用户

     public ArrayList<User> selectAllUserDao() throws ClassNotFoundException, SQLException{

         PreparedStatement ps = DBUtil.getConnection().prepareStatement

                 ("select * from user_0327");

         ResultSet rs = ps.executeQuery();

         ArrayList<User> al = new ArrayList<User>();

         while(rs.next()){

             User user = new User();

             user.setUserid(rs.getInt(1));

             user.setUsername(rs.getString(2));

             user.setPassword(rs.getString(3));

             user.setNikename(rs.getString(4));

             user.setSex(rs.getString(5));

             user.setAge(rs.getInt(6));

             user.setImage(rs.getString(7));

             al.add(user);

         }

         ps.close();

         rs.close();

         DBUtil.getConnection().close();

         return al;

     }

     //增加用户

     public void addUserDao(User user) throws ClassNotFoundException, SQLException{

         PreparedStatement ps = DBUtil.getConnection().prepareStatement

                 ("insert into user_0327 values(user0327_seq.nextval,?,?,?,?,?,?)");

         ps.setString(1, user.getUsername());

         ps.setString(2, user.getPassword());

         ps.setString(3, user.getNikename());

         ps.setString(4, user.getSex());

         ps.setInt(5, user.getAge());

         //这里先将头像照片定死，没有使用上传图片

         ps.setString(6, "image/"+user.getImage());

         ps.executeUpdate();

         ps.close();

         DBUtil.getConnection().close();

     }

 //删除用户

     public void deleteUserDao(int id) throws ClassNotFoundException, SQLException{

         PreparedStatement ps = DBUtil.getConnection().prepareStatement

                 ("delete from user_0327 where userid=?");

         ps.setInt(1, id);

         ps.executeQuery();

         ps.close();

         DBUtil.getConnection().close();

     }

 //修改之查询

     public User updateSelectUserByIdDao(int id) throws ClassNotFoundException, SQLException{

         PreparedStatement ps = DBUtil.getConnection().prepareStatement

                 ("select * from user_0327 where userid=?");

         ps.setInt(1, id);

         ResultSet rs = ps.executeQuery();

         User user = new User();

         while(rs.next()){

             user.setUserid(rs.getInt(1));

             user.setUsername(rs.getString(2));

             user.setPassword(rs.getString(3));

             user.setNikename(rs.getString(4));

             user.setSex(rs.getString(5));

             user.setAge(rs.getInt(6));

             user.setImage(rs.getString(7));

         }

         ps.close();

         rs.close();

         DBUtil.getConnection().close();

         return user;

     }

 //修改之修改

     public void updateUserByIdDao(User user) throws ClassNotFoundException, SQLException{

         PreparedStatement ps = DBUtil.getConnection().prepareStatement

                 ("update user_0327 set username=?,password=?,nikename=?,sex=?,age=?,image=? where userid =?");

         ps.setString(1, user.getUsername());

         ps.setString(2, user.getPassword());

         ps.setString(3, user.getNikename());

         ps.setString(4, user.getSex());

         ps.setInt(5, user.getAge());

         ps.setString(6, "image"+user.getImage());

         ps.setInt(7, user.getUserid());

         ps.executeUpdate();

         ps.close();

         DBUtil.getConnection().close();

     }

 //获得分页数量

     public int getTotalPageDao(int pagesize) throws ClassNotFoundException, SQLException{

         PreparedStatement ps = DBUtil.getConnection().prepareStatement

                 ("select count(userid) c from user_0327");

         ResultSet rs = ps.executeQuery();

         int total =0;

         if(rs.next()){

             int num = rs.getInt("c");

             total = num%pagesize==0?num/pagesize:num/pagesize+1;

         }

         ps.close();

         DBUtil.getConnection().close();

         return total;

     }

 }

8.(com.icss.service)UserService.java

 /**

   * <p>Title: UserService.java</p>

 　 * <p>Description: </p>

 　 * <p>Copyright: Copyright (c) 2020</p>

 　 * <p>Company: </p>

 　 * @author liuxin

 　 * @date 2020年3月27日

 　 * @version 1.0

  */

 package com.icss.service;

 import java.sql.SQLException;

 import java.util.ArrayList;

 import com.icss.dao.UserDao;

 import com.icss.vo.User;

 /**

  * <p>Title: UserService</p>

 　 * <p>Description: </p>

 　 * @author liuxin

 　 * @date 2020年3月27日

  */

 public class UserService {

     public ArrayList<User> selectAllUserService() throws ClassNotFoundException, SQLException{

         UserDao user = new UserDao();

         return user.selectAllUserDao();

     }

     public void addUserService(User user) throws ClassNotFoundException, SQLException{

         UserDao ud = new UserDao();

         ud.addUserDao(user);

     }

     public void deleteUserService(int id) throws ClassNotFoundException, SQLException{

         UserDao ud = new UserDao();

         ud.deleteUserDao(id);

     }

     public User updateSelectUserByIdService(int id) throws ClassNotFoundException, SQLException{

         UserDao ud = new UserDao();

         return ud.updateSelectUserByIdDao(id);

     }

     public void updateUserByIdService(User user) throws ClassNotFoundException, SQLException{

         UserDao ud = new UserDao();

         ud.updateUserByIdDao(user);

     }

     public int getTotalPageService(int pagesize) throws ClassNotFoundException, SQLException{

         UserDao ud = new UserDao();

         return ud.getTotalPageDao(pagesize);

     }

 }

9.(com.icss.controller)SelectAllUserServlet.java

 package com.icss.controller;

 import java.io.IOException;

 import java.sql.SQLException;

 import java.util.ArrayList;

 import javax.servlet.ServletException;

 import javax.servlet.annotation.WebServlet;

 import javax.servlet.http.HttpServlet;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import com.icss.service.UserService;

 import com.icss.vo.User;

 /**

  * Servlet implementation class SelectAllUserServlet

  */

 @WebServlet("/SelectAllUserServlet")

 public class SelectAllUserServlet extends HttpServlet {

     private static final long serialVersionUID = 1L;

     /**

      * @see HttpServlet#HttpServlet()

      */

     public SelectAllUserServlet() {

         super();

         // TODO Auto-generated constructor stub

     }

     /**

      * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

      */

     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         doPost(request, response);

     }

     /**

      * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

      */

     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         request.setCharacterEncoding("utf-8");

         //接受请求

         //处理请求

         UserService us = new UserService();

         try {

             //************分页数**************

             int pagesize = 3;

             int num = us.getTotalPageService(pagesize);

             System.out.println(num);

             request.setAttribute("num", num);

             //************分页数**************

             ArrayList<User> user = us.selectAllUserService();

             request.setAttribute("user", user);

             request.getRequestDispatcher("AddUser.jsp").forward(request, response);

         } catch (ClassNotFoundException e) {

             // TODO Auto-generated catch block

             e.printStackTrace();

         } catch (SQLException e) {

             // TODO Auto-generated catch block

             e.printStackTrace();

         }

     }

 }

10.(com.icss.controller)AddUserServlet.java

 package com.icss.controller;

 import java.io.IOException;

 import java.sql.SQLException;

 import javax.servlet.ServletException;

 import javax.servlet.annotation.WebServlet;

 import javax.servlet.http.HttpServlet;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import com.icss.service.UserService;

 import com.icss.vo.User;

 /**

  * Servlet implementation class AddUserServle

  */

 @WebServlet("/AddUserServle")

 public class AddUserServle extends HttpServlet {

     private static final long serialVersionUID = 1L;

     /**

      * @see HttpServlet#HttpServlet()

      */

     public AddUserServle() {

         super();

         // TODO Auto-generated constructor stub

     }

     /**

      * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

      */

     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         doPost(request, response);

     }

     /**

      * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

      */

     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         request.setCharacterEncoding("utf-8");

         //接受请求

         User user = new User();

         //String user2 = request.getParameter("username");

         user.setUsername(request.getParameter("username"));

         ///System.out.println(user2);

         user.setPassword(request.getParameter("password"));

         user.setNikename(request.getParameter("nikename"));

         user.setSex(request.getParameter("sex"));

         user.setAge(Integer.parseInt(request.getParameter("age")));

         user.setImage(request.getParameter("image"));

         //处理请求

         UserService us = new UserService();

         try {

             us.addUserService(user);

             request.getRequestDispatcher("SelectAllUserServlet").forward(request, response);

         } catch (ClassNotFoundException e) {

             // TODO Auto-generated catch block

             e.printStackTrace();

         } catch (SQLException e) {

             // TODO Auto-generated catch block

             e.printStackTrace();

         }

     }

 }

11.(com.icss.controller)UpdateSelectUserByIdServlet.java

 package com.icss.controller;

 import java.io.IOException;

 import java.sql.SQLException;

 import javax.servlet.ServletException;

 import javax.servlet.annotation.WebServlet;

 import javax.servlet.http.HttpServlet;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import com.icss.service.UserService;

 import com.icss.vo.User;

 /**

  * Servlet implementation class UpdateSelectUserByIdServlet

  */

 @WebServlet("/UpdateSelectUserByIdServlet")

 public class UpdateSelectUserByIdServlet extends HttpServlet {

     private static final long serialVersionUID = 1L;

     /**

      * @see HttpServlet#HttpServlet()

      */

     public UpdateSelectUserByIdServlet() {

         super();

         // TODO Auto-generated constructor stub

     }

     /**

      * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

      */

     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         doPost(request, response);

     }

     /**

      * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

      */

     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         request.setCharacterEncoding("utf-8");

         //接受数据

         int id = Integer.parseInt(request.getParameter("userid"));

         //System.out.println(id);

         //处理数据

         UserService us = new UserService();

         try {

             User user = us.updateSelectUserByIdService(id);

             request.setAttribute("user", user);

             request.getRequestDispatcher("UpdateUser.jsp").forward(request, response);

         } catch (ClassNotFoundException e) {

             // TODO Auto-generated catch block

             e.printStackTrace();

         } catch (SQLException e) {

             // TODO Auto-generated catch block

             e.printStackTrace();

         }

     }

 }

12.(com.icss.controller)UpdateUserServlet.java

 package com.icss.controller;

 import java.io.IOException;

 import java.sql.SQLException;

 import javax.servlet.ServletException;

 import javax.servlet.annotation.WebServlet;

 import javax.servlet.http.HttpServlet;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import com.icss.service.UserService;

 import com.icss.vo.User;

 /**

  * Servlet implementation class UpdateUserServlet

  */

 @WebServlet("/UpdateUserServlet")

 public class UpdateUserServlet extends HttpServlet {

     private static final long serialVersionUID = 1L;

     /**

      * @see HttpServlet#HttpServlet()

      */

     public UpdateUserServlet() {

         super();

         // TODO Auto-generated constructor stub

     }

     /**

      * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

      */

     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         doPost(request, response);

     }

     /**

      * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

      */

     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         request.setCharacterEncoding("utf-8");

         //接受数据

         User user = new User();

         user.setUserid(Integer.parseInt(request.getParameter("userid")));

         user.setUsername(request.getParameter("username"));

         user.setPassword(request.getParameter("password"));

         user.setNikename(request.getParameter("nikename"));

         user.setSex(request.getParameter("sex"));

         user.setAge(Integer.parseInt(request.getParameter("age")));

         user.setImage(request.getParameter("image"));

         //处理请求

         UserService us = new UserService();

         try {

             us.updateUserByIdService(user);

             request.getRequestDispatcher("SelectAllUserServlet").forward(request, response);

         } catch (ClassNotFoundException e) {

             // TODO Auto-generated catch block

             e.printStackTrace();

         } catch (SQLException e) {

             // TODO Auto-generated catch block

             e.printStackTrace();

         }

     }

 }

13.(com.icss.controller)DeleteUserServlet.java

 package com.icss.controller;

 import java.io.IOException;

 import java.sql.SQLException;

 import javax.servlet.ServletException;

 import javax.servlet.annotation.WebServlet;

 import javax.servlet.http.HttpServlet;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import com.icss.service.UserService;

 /**

  * Servlet implementation class DeleteUserServlet

  */

 @WebServlet("/DeleteUserServlet")

 public class DeleteUserServlet extends HttpServlet {

     private static final long serialVersionUID = 1L;

     /**

      * @see HttpServlet#HttpServlet()

      */

     public DeleteUserServlet() {

         super();

         // TODO Auto-generated constructor stub

     }

     /**

      * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

      */

     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         doPost(request, response);

     }

     /**

      * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

      */

     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         request.setCharacterEncoding("utf-8");

         //接受请求

         int id = Integer.parseInt(request.getParameter("userid"));

         //System.out.println(id);

         //处理请求

         UserService us = new UserService();

         try {

             us.deleteUserService(id);

             request.getRequestDispatcher("SelectAllUserServlet").forward(request, response);

         } catch (ClassNotFoundException | SQLException e) {

             // TODO Auto-generated catch block

             e.printStackTrace();

         }

     }

 }

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