第2阶段13-vue+axios实现CRM系统删除用户功能

大坏蛋_
147 阅读1分钟

一、前端HTML

1.1、给表格的按钮添加删除时执行的函数

图片.png

图片.png

1.2、在执行删除的函数中通过axios请求servlet删除用户

图片.png

1.3、刷新用户列表

图片.png

1.4、源代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>用户管理</title>
    <!-- 导入bootstrap依赖 -->
    <link rel="stylesheet" href="assets/bootstrap-3.3.7-dist/css/bootstrap.min.css">
    <script src="assets/jquery-3.5.1/jquery-3.5.1.min.js"></script>
    <script src="assets/bootstrap-3.3.7-dist/js/bootstrap.min.js"></script>
    <!-- 导入vue依赖 -->
    <script src="assets/vue.min-v2.5.16.js"></script>
    <script src="assets/axios.min.js"></script>
    <style>
        a:link{font-size: 20px; color: rgb(109,109,109);}
        a:visited{font-size: 20px; color: rgb(109,109,109);}
        a:hover{font-size: 20px; color: white; text-decoration: none;}
    </style>
</head>
<body>
<div class="container" id="app">
    <!-- bootstrap行-->
    <div class="row">
        <!-- 显示导航-->
        <div class="col-md-3" style="background-color: rgb(0,21,41); height: 800px;">
            <!-- bootstrap行 -->
            <div class="row">
                <div class="col-md-12" style="background-color: rgb(0,40,77); text-align: center; height: 70px; line-height: 70px; font-size: 20px; color: white; font-weight: bold">
                    <img src="assets/img/logo.png" style="width: 30px; height: 30px; margin-right: 8px"/>
                    蜗牛CRM管理系统
                </div>
            </div>
            <div class="row">
                <div class="col-md-12" style="text-align: center; padding: 20px 0px 20px 0px">
                    <a href="index.html">进入首页</a>
                </div>
            </div>
            <div class="row">
                <div class="col-md-12" style="text-align: center; padding: 20px 0px 20px 0px">
                    <a href="user_list.html">用户管理</a>
                </div>
            </div>
            <div class="row">
                <div class="col-md-12" style="text-align: center; padding: 20px 0px 20px 0px">
                    <a href="user_add.html">添加用户</a>
                </div>
            </div>
            <div class="row">
                <div class="col-md-12" style="text-align: center; padding: 20px 0px 20px 0px">
                    <a href="#">客户管理</a>
                </div>
            </div>
            <div class="row">
                <div class="col-md-12" style="text-align: center; padding: 20px 0px 20px 0px">
                    <a href="#">添加客户</a>
                </div>
            </div>
            <div class="row">
                <div class="col-md-12" style="text-align: center; padding: 20px 0px 20px 0px">
                    <a href="#">修改密码</a>
                </div>
            </div>
            <div class="row">
                <div class="col-md-12" style="text-align: center; padding: 20px 0px 20px 0px">
                    <a href="login.html">退出登录</a>
                </div>
            </div>
        </div>
        <!-- 显示内容 -->
        <div class="col-md-9" style="border: 1px solid gray; height: 800px">
            <div class="row">
                <!-- 显示提示位置 -->
                <div class="col-md-12" style="height: 70px; color: rgb(109,109,109); font-size: 18px; line-height: 70px; font-weight: bold; padding-left: 20px">
                    >&nbsp;&nbsp;用户管理
                </div>
            </div>
            <!-- 显示内容 -->
            <div class="row" style="background-color: rgb(240,242,245); height: 730px; padding: 20px">
                <div class="col-md-12" style="background-color: white; height: 730px; border: none; border-radius: 5px;">
                    <!-- 使用bootstrap表格斑马线样式-->
                    <table class="table table-striped" style="margin-top: 20px">
                        <!-- 表格描述 -->
                        <caption>用户管理-用户列表</caption>
                        <!--表头-->
                        <thead>
                            <tr>
                                <th>ID</th>
                                <th>用户名</th>
                                <th>昵称</th>
                                <th>性别</th>
                                <th>生日</th>
                                <th>手机号</th>
                                <th>操作</th>
                            </tr>
                        </thead>
                        <!-- 表格内容-->
                        <tbody>
                            <tr v-for="u in users">
                                <td>{{u.id}}</td>
                                <td>{{u.userName}}</td>
                                <td>{{u.nickName}}</td>
                                <td>{{u.sex}}</td>
                                <td>{{u.birth}}</td>
                                <td>{{u.phone}}</td>
                                <td>
                                    <button class="btn btn-link">修改</button>
                                    <button class="btn btn-link" @click="doDelete(u.id)">删除</button>
                                </td>
                            </tr>
                        </tbody>

                    </table>
                </div>
            </div>
        </div>
    </div>
</div>
<script>
    new Vue({
        el: '#app',
        data: {
            users: null
        },
        created: function () { //页面加载完成之后执行
            this.reqeustUserList(); //调用请求用户列表的函数
        },
        methods: {
            /* 删除用户，根据id*/
            doDelete(id){
                // console.log("要删除的用户id："+id);
                // 请求servlet删除用户
                axios.get("delete_user?id="+id).then(response => {
                    if(response.data == '删除成功'){
                        //刷新用户列表
                        this.reqeustUserList(); //调用请求用户列表的函数
                    } else {
                        alert("删除失败！！！");
                    }
                });
            },
            reqeustUserList(){ //请求用户列表
                //发送请求获取用户列表
                axios.get("user_list").then(response => {
                    this.users = response.data;
                });
            }
        }
    });
</script>
</body>
</html>

二、后端Servlet

2.1、DAO中添加根据id删除用户的方法

public int deleteById(int id) {
    String sql = "delete from t_user where id="+id;
    return this.excuteUpdate(sql);
}

2.2、创建UserDeleteServlet

package controller;

import dao.UserDAO;
import dao.impl.UserDAOImpl;

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.io.PrintWriter;

/**
 * 删除用户，根据id
 */
@WebServlet("/delete_user")
public class UserDeleteServlet extends HttpServlet {

    @Override
    protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //转码
        req.setCharacterEncoding("utf-8");
        resp.setCharacterEncoding("utf-8");
        resp.setContentType("application/json;charset=utf8");

        //获取打印输出流，向网页输出内容
        PrintWriter writer = resp.getWriter();

        //获取前台页面传来的值
        int id = Integer.parseInt(req.getParameter("id"));

        //通过dao删除用户
        UserDAO dao = new UserDAOImpl();
        int count = dao.deleteById(id);

        //向网页输出内容
        if(count > 0){
            writer.print("删除成功");
        } else {
            writer.print("删除失败");
        }

        //释放资源
        writer.close();
    }
}
avatar
文章
阅读
粉丝