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用servlet来实现增删改数据库等功能

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  • Post category:其他


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结构分层


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web项目


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index.jsp
 

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="utf-8"/>
  <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
  <meta name="viewport" content="width=device-width, initial-scale=1"/>
  <title>首页</title>

  <!-- 1. 导入CSS的全局样式 -->
  <link href="css/bootstrap.min.css" rel="stylesheet">
  <!-- 2. jQuery导入，建议使用1.9以上的版本 -->
  <script src="js/jquery-2.1.0.min.js"></script>
  <!-- 3. 导入bootstrap的js文件 -->
  <script src="js/bootstrap.min.js"></script>
  <script type="text/javascript">
  </script>
</head>
<body>


  <div >${user.name},欢迎您</div>
  <div align="center">
    <a
            href="${pageContext.request.contextPath}/findUserByPageServlet" style="text-decoration:none;font-size:33px">查询所有用户信息
    </a>
  </div>






</body>
</html>


add.jsp
 

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

<!-- HTML5文档-->
<!DOCTYPE html>
<!-- 网页使用的语言 -->
<html lang="zh-CN">
<head>
    <!-- 指定字符集 -->
    <meta charset="utf-8">
    <!-- 使用Edge最新的浏览器的渲染方式 -->
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <!-- viewport视口：网页可以根据设置的宽度自动进行适配，在浏览器的内部虚拟一个容器，容器的宽度与设备的宽度相同。
    width: 默认宽度与设备的宽度相同
    initial-scale: 初始的缩放比，为1:1 -->
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
    <title>添加用户</title>

    <!-- 1. 导入CSS的全局样式 -->
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <!-- 2. jQuery导入，建议使用1.9以上的版本 -->
    <script src="js/jquery-2.1.0.min.js"></script>
    <!-- 3. 导入bootstrap的js文件 -->
    <script src="js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
    <center><h3>添加联系人页面</h3></center>
    <form action="${pageContext.request.contextPath}/addUserServlet" method="post">
        <div class="form-group">
            <label for="name">姓名：</label>
            <input type="text" class="form-control" id="name" name="name" placeholder="请输入姓名">
        </div>

        <div class="form-group">
            <label>性别：</label>
            <input type="radio" name="gender" value="男" checked="checked"/>男
            <input type="radio" name="gender" value="女"/>女
        </div>

        <div class="form-group">
            <label for="age">年龄：</label>
            <input type="text" class="form-control" id="age" name="age" placeholder="请输入年龄">
        </div>

        <div class="form-group">
            <label for="address">籍贯：</label>
            <select name="address" class="form-control" id="address">
                <option value="陕西">陕西</option>
                <option value="北京">北京</option>
                <option value="上海">上海</option>
            </select>
        </div>

        <div class="form-group">
            <label for="qq">QQ：</label>
            <input type="text" class="form-control" id="qq" name="qq" placeholder="请输入QQ号码"/>
        </div>

        <div class="form-group">
            <label for="email">Email：</label>
            <input type="text" class="form-control" id="email" name="email" placeholder="请输入邮箱地址"/>
        </div>

        <div class="form-group" style="text-align: center">
            <input class="btn btn-primary" type="submit" value="提交" />
            <input class="btn btn-default" type="reset" value="重置" />
            <input class="btn btn-default" type="button" value="返回" />
        </div>
    </form>
</div>
</body>
</html>


list.jsp
 

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

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

<!DOCTYPE html>
<!-- 网页使用的语言 -->
<html lang="zh-CN">
<head>
    <!-- 指定字符集 -->
    <meta charset="utf-8">
    <!-- 使用Edge最新的浏览器的渲染方式 -->
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <!-- viewport视口：网页可以根据设置的宽度自动进行适配，在浏览器的内部虚拟一个容器，容器的宽度与设备的宽度相同。
    width: 默认宽度与设备的宽度相同
    initial-scale: 初始的缩放比，为1:1 -->
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
    <title>用户信息管理系统</title>

    <!-- 1. 导入CSS的全局样式 -->
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <!-- 2. jQuery导入，建议使用1.9以上的版本 -->
    <script src="js/jquery-2.1.0.min.js"></script>
    <!-- 3. 导入bootstrap的js文件 -->
    <script src="js/bootstrap.min.js"></script>
    <style type="text/css">
        td, th {
            text-align: center;
        }
    </style>

    <script>
        function deleteUser(id){
            //用户安全提示
            if(confirm("您确定要删除吗？")){
                //访问路径
                location.href="${pageContext.request.contextPath}/delUserServlet?id="+id;
            }
        }

        window.onload = function(){
            //给删除选中按钮添加单击事件
            document.getElementById("delSelected").onclick = function(){
                if(confirm("您确定要删除选中条目吗？")){

                   var flag = false;
                    //判断是否有选中条目
                    var cbs = document.getElementsByName("uid");
                    for (var i = 0; i < cbs.length; i++) {
                        if(cbs[i].checked){
                            //有一个条目选中了
                            flag = true;
                            break;
                        }
                    }

                    if(flag){//有条目被选中
                        //表单提交
                        document.getElementById("form").submit();
                    }

                }

            }
            //1.获取第一个cb
            document.getElementById("firstCb").onclick = function(){
                //2.获取下边列表中所有的cb
                var cbs = document.getElementsByName("uid");
                //3.遍历
                for (var i = 0; i < cbs.length; i++) {
                    //4.设置这些cbs[i]的checked状态 = firstCb.checked
                    cbs[i].checked = this.checked;

                }

            }


        }


    </script>
</head>
<body>
<div class="container">
    <h3 style="text-align: center">用户信息列表</h3>

    <div style="float: left;">

        <form class="form-inline" action="${pageContext.request.contextPath}/findUserByPageServlet" method="post">
            <div class="form-group">
                <label for="exampleInputName2">姓名</label>
                <input type="text" name="name" value="${condition.name[0]}" class="form-control" id="exampleInputName2" >
            </div>
            <div class="form-group">
                <label for="exampleInputName3">籍贯</label>
                <input type="text" name="address" value="${condition.address[0]}" class="form-control" id="exampleInputName3" >
            </div>

            <div class="form-group">
                <label for="exampleInputEmail2">邮箱</label>
                <input type="text" name="email" value="${condition.email[0]}" class="form-control" id="exampleInputEmail2"  >
            </div>
            <button type="submit" class="btn btn-default">查询</button>
        </form>

    </div>

    <div style="float: right;margin: 5px;">

        <a class="btn btn-primary" href="${pageContext.request.contextPath}/add.jsp">添加联系人</a>
        <a class="btn btn-primary" href="javascript:void(0);" id="delSelected">删除选中</a>

    </div>
    <form id="form" action="${pageContext.request.contextPath}/delSelectedServlet" method="post">
        <table border="1" class="table table-bordered table-hover">
        <tr class="success">
            <th><input type="checkbox" id="firstCb"></th>
            <th>编号</th>
            <th>姓名</th>
            <th>性别</th>
            <th>年龄</th>
            <th>籍贯</th>
            <th>QQ</th>
            <th>邮箱</th>
            <th>操作</th>
        </tr>

        <c:forEach items="${list}" var="user" varStatus="s">
            <tr>
                <td><input type="checkbox" name="uid" value="${user.id}"></td>
                <td>${s.count}</td>
                <td>${user.name}</td>
                <td>${user.gender}</td>
                <td>${user.age}</td>
                <td>${user.address}</td>
                <td>${user.qq}</td>
                <td>${user.email}</td>
                <td><a class="btn btn-default btn-sm" href="${pageContext.request.contextPath}/findUserServlet?id=${user.id}">修改</a>&nbsp;
                    <a class="btn btn-default btn-sm" href="javascript:deleteUser(${user.id});">删除</a></td>
            </tr>

        </c:forEach>


    </table>
    </form>
    <div>
        <nav aria-label="Page navigation">
            <ul class="pagination">
                <c:if test="${pb.currentPage == 1}">
                    <li class="disabled">
                </c:if>

                <c:if test="${pb.currentPage != 1}">
                    <li>
                </c:if>


                    <a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${pb.currentPage - 1}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}" aria-label="Previous">
                        <span aria-hidden="true">&laquo;</span>
                    </a>
                </li>


                <c:forEach begin="1" end="${pb.totalPage}" var="i" >


                    <c:if test="${pb.currentPage == i}">
                        <li class="active"><a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${i}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}">${i}</a></li>
                    </c:if>
                    <c:if test="${pb.currentPage != i}">
                        <li><a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${i}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}">${i}</a></li>
                    </c:if>

                </c:forEach>


                <li>
                    <a href="${pageContext.request.contextPath}/findUserByPageServlet?currentPage=${pb.currentPage + 1}&rows=5&name=${condition.name[0]}&address=${condition.address[0]}&email=${condition.email[0]}" aria-label="Next">
                        <span aria-hidden="true">&raquo;</span>
                    </a>
                </li>
                <span style="font-size: 25px;margin-left: 5px;">
                    共${pb.totalCount}条记录，共${pb.totalPage}页
                </span>

            </ul>
        </nav>


    </div>


</div>


</body>
</html>


login.jsp
 

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

<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="utf-8"/>
    <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
    <meta name="viewport" content="width=device-width, initial-scale=1"/>
    <title>管理员登录</title>

    <!-- 1. 导入CSS的全局样式 -->
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <!-- 2. jQuery导入，建议使用1.9以上的版本 -->
    <script src="js/jquery-2.1.0.min.js"></script>
    <!-- 3. 导入bootstrap的js文件 -->
    <script src="js/bootstrap.min.js"></script>
    <script type="text/javascript">
        //切换验证码
        function refreshCode(){
            //1.获取验证码图片对象
            var vcode = document.getElementById("vcode");

            //2.设置其src属性，加时间戳
            vcode.src = "${pageContext.request.contextPath}/checkCodeServlet?time="+new Date().getTime();
        }
    </script>
</head>
<body>
<div class="container" style="width: 400px;">
    <h3 style="text-align: center;">管理员登录</h3>
    <form action="${pageContext.request.contextPath}/loginServlet" method="post">
        <div class="form-group">
            <label for="user">用户名：</label>
            <input type="text" name="username" class="form-control" id="user" placeholder="请输入用户名"/>
        </div>

        <div class="form-group">
            <label for="password">密码：</label>
            <input type="password" name="password" class="form-control" id="password" placeholder="请输入密码"/>
        </div>

        <div class="form-inline">
            <label for="vcode">验证码：</label>
            <input type="text" name="verifycode" class="form-control" id="verifycode" placeholder="请输入验证码" style="width: 120px;"/>
            <a href="javascript:refreshCode();">
                <img src="${pageContext.request.contextPath}/checkCodeServlet" title="看不清点击刷新" id="vcode"/>
            </a>
        </div>
        <hr/>
        <div class="form-group" style="text-align: center;">
            <input class="btn btn btn-primary" type="submit" value="登录">
        </div>
    </form>

    <!-- 出错显示的信息框 -->
    <div class="alert alert-warning alert-dismissible" role="alert">
        <button type="button" class="close" data-dismiss="alert" >
            <span>&times;</span>
        </button>
        <strong>${login_msg}</strong>
    </div>
</div>
</body>
</html>


druid.properties


数据库连接属性 

driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql:///student
username=root
password=123
initialSize=5
maxActive=10
maxWait=3000


JDBCUtils.java


连接数据库 

package utils;

import com.alibaba.druid.pool.DruidDataSourceFactory;

import javax.sql.DataSource;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

/**
 * @author DAJ
 * @version 1.0
 * @ClassName JDBCUtils
 * @date 2019/7/17 14:01
 */
public class JDBCUtils {
    private static DataSource ds;

    static {
        Properties pro =new Properties();
        InputStream is = JDBCUtils.class.getClassLoader().getResourceAsStream("druid.properties");
        try {
            pro.load(is);
            ds = DruidDataSourceFactory.createDataSource(pro);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static DataSource getDs(){
        return ds;
    }

    public static Connection getConn() throws SQLException {
        return  ds.getConnection();
    }

}


update.jsp
 

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<!-- 网页使用的语言 -->
<html lang="zh-CN">
    <head>
        <!-- 指定字符集 -->
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <title>修改用户</title>

        <link href="css/bootstrap.min.css" rel="stylesheet">
        <script src="js/jquery-2.1.0.min.js"></script>
        <script src="js/bootstrap.min.js"></script>
        
    </head>
    <body>
        <div class="container" style="width: 400px;">
        <h3 style="text-align: center;">修改联系人</h3>
        <form action="${pageContext.request.contextPath}/updateUserServlet" method="post">
            <!--  隐藏域 提交id-->
            <input type="hidden" name="id" value="${user.id}">

          <div class="form-group">
            <label for="name">姓名：</label>
            <input type="text" class="form-control" id="name" name="name"  value="${user.name}" readonly="readonly" placeholder="请输入姓名" />
          </div>

          <div class="form-group">
            <label>性别：</label>
              <c:if test="${user.gender == '男'}">
                  <input type="radio" name="gender" value="男" checked />男
                  <input type="radio" name="gender" value="女"  />女
              </c:if>

              <c:if test="${user.gender == '女'}">
                  <input type="radio" name="gender" value="男"  />男
                  <input type="radio" name="gender" value="女" checked  />女
              </c:if>


          </div>

          <div class="form-group">
            <label for="age">年龄：</label>
            <input type="text" class="form-control" value="${user.age}" id="age"  name="age" placeholder="请输入年龄" />
          </div>

          <div class="form-group">
            <label for="address">籍贯：</label>
             <select name="address" id="address" class="form-control" >
                 <c:if test="${user.address == '陕西'}">
                    <option value="陕西" selected>陕西</option>
                    <option value="北京">北京</option>
                    <option value="上海">上海</option>
                 </c:if>

                 <c:if test="${user.address == '北京'}">
                     <option value="陕西" >陕西</option>
                     <option value="北京" selected>北京</option>
                     <option value="上海">上海</option>
                 </c:if>

                 <c:if test="${user.address == '上海'}">
                     <option value="陕西" >陕西</option>
                     <option value="北京">北京</option>
                     <option value="上海" selected>上海</option>
                 </c:if>
            </select>
          </div>

          <div class="form-group">
            <label for="qq">QQ：</label>
            <input type="text" id="qq" class="form-control" value="${user.qq}" name="qq" placeholder="请输入QQ号码"/>
          </div>

          <div class="form-group">
            <label for="email">Email：</label>
            <input type="text" id="email" class="form-control" value="${user.email}" name="email" placeholder="请输入邮箱地址"/>
          </div>

             <div class="form-group" style="text-align: center">
                <input class="btn btn-primary" type="submit" value="提交" />
                <input class="btn btn-default" type="reset" value="重置" />
                <input class="btn btn-default" type="button" value="返回"/>
             </div>
        </form>
        </div>
    </body>
</html>


dao


先创建底层接口和实现方法

UserDao.java 

package dao;

import entity.Person;

import java.util.List;

public interface UserDao {
    /**
     *功能描述 添加用户
     * @author DAJ
     * @date 2019/7/17
     * @param person
     * @return void
     */
    void addPerson(Person person);


    /**
     *功能描述 根据ID查询用户
     * @author DAJ
     * @date 2019/7/17
     * @param id
     * @return entity.Person
     */
    Person queryPersonById(int id);

    /**
     *功能描述 查询全部信息
     * @author DAJ
     * @date 2019/7/17
     * @param null
     * @return
     */
    List<Person> queryonly();

    /**
     *功能描述 修改用户
     * @author DAJ
     * @date 2019/7/17
     * @param person
     * @return void
     */
    void updatePerson(Person person);

    /**
     *功能描述 删除用户
     * @author DAJ
     * @date 2019/7/17
     * @param id
     * @return void
     */
    void delete(int id);
}

UserDaoImlpl.java 

package dao.impl;


import dao.UserDao;
import entity.Person;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import utils.JDBCUtils;

import java.util.List;

/**
 * @author DAJ
 * @version 1.0
 * @ClassName UserDaoImpl
 * @date 2019/7/17 15:19
 */
public class UserDaoImpl implements UserDao {
    private static JdbcTemplate jt=null;
    static {
        jt = new JdbcTemplate(JDBCUtils.getDs());

    }

    @Override
    public void addPerson(Person person) {
        String sql="insert into web values (null,?,?,?,?,?,?)";
        jt.update(sql, person.getName(), person.getgender(), person.getAge(), person.getaddress(), person.getQq(), person.getEmail());
    }

    @Override
    public Person queryPersonById(int id) {
        String sql="select * from web where id=?";
        List<Person> query = jt.query(sql, new BeanPropertyRowMapper<Person>(Person.class), id);
        return query.get(0);

    }

    @Override
    public List<Person> queryonly() {
        String sql = "select * from web";
        List<Person> query = jt.query(sql, new BeanPropertyRowMapper<Person>(Person.class));
        return query;
    }

    @Override
    public void updatePerson(Person person) {
        String sql = "update web set name=?,gender=?,age=?,address=?,qq=?,email=? where id=?";
        jt.update(sql,person.getName(), person.getgender(), person.getAge(), person.getaddress(), person.getQq(), person.getEmail(),person.getId());
    }

    @Override
    public void delete(int id) {
        String sql="delete from web where id=?";
        jt.update(sql, id);
    }
}


Person.jsp

创建数据库类 

package entity;

/**
 * @author DAJ
 * @version 1.0
 * @ClassName Person
 * @date 2019/7/17 13:59
 */
public class Person {
    private int id;
    private String name;
    private String gender;
    private int age;
    private String address;
    private int qq;
    private String email;

    public Person(int id, String name, String gender, int age, String address, int qq, String email) {
        this.id = id;
        this.name = name;
        this.gender = gender;
        this.age = age;
        this.address = address;
        this.qq = qq;
        this.email = email;
    }

    public Person() {

    }

    public Person( String name, String gender, int age, String address, int qq, String email) {
        this.name = name;
        this.gender = gender;
        this.age = age;
        this.address = address;
        this.qq = qq;
        this.email = email;
    }


    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getgender() {
        return gender;
    }

    public void setgender(String gender) {
        this.gender = gender;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getaddress() {
        return address;
    }

    public void setaddress(String address) {
        this.address = address;
    }

    public int getQq() {
        return qq;
    }

    public void setQq(int qq) {
        this.qq = qq;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    @Override
    public String toString() {
        return "Person{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", gender='" + gender + '\'' +
                ", age=" + age +
                ", address='" + address + '\'' +
                ", qq=" + qq +
                ", email='" + email + '\'' +
                '}';
    }
}


service


IPersonService.java 

    package service;
    
    import entity.Person;
    
    import java.util.List;
    
    public interface IPersonService {
        /**
         *功能描述 实现添加信息功能
         * @author DAJ
         * @date 2019/7/17
         * @param person
         * @return void
         */
        void addPerson(Person person);
    
        /**
         *功能描述 修改信息
         * @author DAJ
         * @date 2019/7/17
         * @param person
         * @return void
         */
        void updatePerson(Person person);
    
        /**
         *功能描述 显示全部信息
         * @author DAJ
         * @date 2019/7/17
         * @param
         * @return java.util.List
         */
        List<Person> selectAll();
    
        /**
         *功能描述 通过ID来删除
         * @author DAJ
         * @date 2019/7/17
         * @param id
         * @return void
         */
        void delete(int id);
    
        /**
         *功能描述 查询信息
         * @author DAJ
         * @date 2019/7/17
         * @param id
         * @return entity.Person
         */
        Person selectAll(int id);
    
    }

PersonServiceImpl

package service.impl;

import dao.UserDao;
import dao.impl.UserDaoImpl;
import entity.Person;
import service.IPersonService;

import java.util.List;

/**
 * @author DAJ
 * @version 1.0
 * @ClassName PersonServiceImpl
 * @date 2019/7/17 16:19
 */
public class PersonServiceImpl implements IPersonService {

    private  UserDao dao = new UserDaoImpl();

    @Override
    public void addPerson(Person person) {
        dao.addPerson(person);
    }

    @Override
    public void updatePerson(Person person) {
        dao.updatePerson(person);
    }

    @Override//全部信息
    public List<Person> selectAll() {
        return dao.queryonly();
    }

    @Override
    public void delete(int id) {
        dao.delete(id);
    }

    @Override
    public Person selectAll(int id) {
        return dao.queryPersonById(id);
    }
}


servlet


用注解来时间相关对应的操作


addUserServlet.java
 

package servlet;

import entity.Person;
import service.IPersonService;
import service.impl.PersonServiceImpl;

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 java.io.IOException;

@WebServlet( "/addUserServlet")
public class addUserServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        String name = request.getParameter("name");
        String gender = request.getParameter("gender");
        int age = Integer.parseInt(request.getParameter("age"));
        String address = request.getParameter("address");
        int qq=Integer.parseInt(request.getParameter("qq"));
        String email = request.getParameter("email");

        IPersonService is=new PersonServiceImpl();
        Person person = new Person(name,gender,age,address,qq,email);
        is.addPerson(person);
        response.sendRedirect("findUserByPageServlet");
    }
}


delSelectedServlet.java
 

package servlet;

import service.IPersonService;
import service.impl.PersonServiceImpl;

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 java.io.IOException;

@WebServlet( "/delSelectedServlet")
public class delSelectedServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        IPersonService is=new PersonServiceImpl();
        String[] ids = request.getParameterValues("uid");

        for (String id : ids) {
            is.delete(Integer.parseInt(id));
        }
        response.sendRedirect("findUserByPageServlet");
    }
}


delUserServlet.java
 

package servlet;

import service.IPersonService;
import service.impl.PersonServiceImpl;

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 java.io.IOException;

@WebServlet( "/delUserServlet")
public class delUserServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        int id = Integer.parseInt(request.getParameter("id"));

        IPersonService is = new PersonServiceImpl();
        is.delete(id);
        response.sendRedirect("findUserByPageServlet");
    }
}


findUserByPageServlet.java
 

package servlet;

import entity.Person;
import service.IPersonService;
import service.impl.PersonServiceImpl;

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 java.io.IOException;
import java.util.List;

@WebServlet( "/findUserByPageServlet")
public class findUserByPageServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        IPersonService is = new PersonServiceImpl();

        List<Person> list=is.selectAll();
        request.setAttribute("list",list);
        request.getRequestDispatcher("list.jsp").forward(request,response);

    }
}


findUserServlet.java
 

package servlet;

import entity.Person;
import service.IPersonService;
import service.impl.PersonServiceImpl;

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 java.io.IOException;

@WebServlet( "/findUserServlet")
public class findUserServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        IPersonService is = new PersonServiceImpl();
        int id = Integer.parseInt(request.getParameter("id"));

        Person person = is.selectAll(id);
        request.setAttribute("user", person);
        request.getRequestDispatcher("update.jsp").forward(request,response);
    }
}


updateUserServlet.java
 

package servlet;

import entity.Person;
import service.IPersonService;
import service.impl.PersonServiceImpl;

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 java.io.IOException;

@WebServlet("/updateUserServlet")
public class updateUserServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        IPersonService is=new PersonServiceImpl();

        request.setCharacterEncoding("utf-8");
        int id = Integer.parseInt(request.getParameter("id"));
        String name = request.getParameter("name");
        String gender = request.getParameter("gender");
        int age = Integer.parseInt(request.getParameter("age"));
        String address = request.getParameter("address");
        int qq = Integer.parseInt(request.getParameter("qq"));
        String email = request.getParameter("email");

        Person person = new Person(id, name, gender, age, address, qq, email);

        is.updatePerson(person);
        response.sendRedirect("findUserByPageServlet");

    }
}


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