一、实例需求 ⚽

实现一个简单的CRUD，包含前后端交互。

二、代码实现 🏌

数据库 👀

CREATE TABLE `user` (`id` bigint(20) NOT NULL AUTO_INCREMENT,`name` varchar(20) DEFAULT NULL COMMENT '姓名',`age` int(11) DEFAULT NULL COMMENT '年龄',`sex` varchar(1) DEFAULT NULL COMMENT '性别',`address` varchar(255) DEFAULT NULL COMMENT '地址',`phone` varchar(20) DEFAULT NULL COMMENT '电话',`create_time` varchar(20) DEFAULT NULL COMMENT '创建时间',`avatar` varchar(255) DEFAULT NULL COMMENT '头像',PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1690322826313793539 DEFAULT CHARSET=utf8;

后端实现 📫

方式一（使用springboot + mybatis-plus）

package com.example.demo.service;import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.example.demo.entity.User;
import com.example.demo.mapper.UserMapper;
import org.springframework.boot.autoconfigure.data.web.SpringDataWebProperties;
import org.springframework.stereotype.Service;
import javax.annotation.Resource;
import java.awt.print.Pageable;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;@Service
public class UserService {@Resourceprivate UserMapper userMapper;public void save(User user) {String now = new SimpleDateFormat("yyyy-MM-dd").format(new Date());user.setCreateTime(now);userMapper.insert(user);}public void delete(Long id) {userMapper.deleteById(id);}public User findById(Long id) {if(id !=null){QueryWrapper<User> queryWrapper = Wrappers.query();queryWrapper.eq("id", id);return userMapper.selectOne(queryWrapper);}else{return  null;}}public List<User> findAll() {QueryWrapper<User> queryWrapper = Wrappers.query();return userMapper.selectList(queryWrapper);}public IPage<User> findPage(Integer pageNum, Integer pageSize, String name) {LambdaQueryWrapper<User> queryWrapper = Wrappers.lambdaQuery();queryWrapper.like(User::getName, "%" + name + "%");return userMapper.selectPage(new Page<>(pageNum, pageSize), queryWrapper);}
}

参考资源下载。

方式二（使用JPA）

参考源码下载。

前端实现 🌱

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>用户信息</title><link rel="stylesheet" href="element.css">
</head>
<body>
<div id="app" style="width: 80%; margin: 0 auto"><h2>员工信息表</h2><el-row ><el-col :span="2" style="margin-bottom: 10px"><el-button type="primary" @click="add">新增</el-button></el-col><el-col :span="2" style="margin-bottom: 10px"><el-button type="primary" @click="search" >查询</el-button></el-col><el-col :span="6" style="margin-bottom: 10px"><el-input v-model="name" placeholder="请输入员工姓名" style="width: 70%"></el-input></el-col></el-row><el-table:data="page.records"stripeborderstyle="width: 100%"><el-table-columnprop="name"label="用户名"></el-table-column><!-- 新增头像图片列 --><el-table-columnprop="avatar"label="头像"><template slot-scope="scope"><el-image :src="scope.row.avatar" style="width: 60px; height: 60px;"></el-image></template></el-table-column><el-table-columnprop="age"label="年龄"width="180"></el-table-column><el-table-columnprop="sex"label="性别"></el-table-column><el-table-columnprop="address"label="地址"></el-table-column><el-table-columnprop="phone"label="电话"></el-table-column><el-table-columnfixed="right"label="操作"width="100"><template slot-scope="scope"><el-button type="primary" icon="el-icon-edit" size="small" circle @click="edit(scope.row)"></el-button><el-button type="danger" icon="el-icon-delete" size="small" circle @click="del(scope.row.id)"></el-button></template></el-table-column></el-table><el-row type="flex" justify="center" style="margin-top: 10px"><el-paginationlayout="prev, pager, next":page-size="pageSize":current-page="pageNum"@prev-click="loadTable"@current-change="loadTable"@next-click="loadTable":total="page.totalElements"></el-pagination></el-row><el-dialogtitle="用户信息":visible.sync="dialogVisible"width="30%"><el-form ref="form" :model="form" label-width="80px"><el-form-item label="用户名"><el-input v-model="form.name"></el-input></el-form-item><el-form-item label="头像"></el-form-item><el-form-item label="年龄"><el-input v-model="form.age"></el-input></el-form-item><el-form-item label="性别"><el-radio v-model="form.sex" label="男">男</el-radio><el-radio v-model="form.sex" label="女">女</el-radio></el-form-item><el-form-item label="地址"><el-input v-model="form.address"></el-input></el-form-item><el-form-item label="电话"><el-input v-model="form.phone"></el-input></el-form-item></el-form><span slot="footer" class="dialog-footer"><el-button @click="dialogVisible = false">取 消</el-button><el-button type="primary" @click="save">确 定</el-button></span></el-dialog></div>
<script src="jquery.min.js"></script>
<script src="vue.js"></script>
<script src="element.js"></script>
<script>new Vue({el: '#app',// 在el属性中指定了Vue实例要挂载的元素id为"app"，即前面提到的div容器。data: { // data属性是一个对象，存储了Vue实例的数据。page用于存储从服务器获取到的用户信息数据，初始值为空对象。name是用于搜索用户名称的字段，默认为空字符串。page: {},name: '',pageNum: 1,// pageNum表示当前页码，默认为1。pageSize: 4, // pageSize表示每页显示的数据条数，默认为4。dialogVisible: false,// dialogVisible控制弹窗的显示与隐藏，默认为false（隐藏）form: {avatar : ''},// form是用于编辑用户信息的表单数据对象，默认为空对象。message: {duration: 500 // 持续时间为0.5秒}},created() { // created方法是Vue实例的生命周期钩子，在实例创建后立即执行。在这个钩子中调用了loadTable方法，将pageNum作为参数传入，加载表格数据。this.loadTable(this.pageNum);},methods: {loadTable(num) {this.pageNum = num;$.get("/user/page?pageNum=" + this.pageNum + "&pageSize=" + this.pageSize + "&name=" + this.name).then(res => {this.page = res.data;});},add() {this.dialogVisible = true;this.form = {};},edit(row) {this.form = row;this.dialogVisible = true;},save() {let data = JSON.stringify(this.form);if (this.form.id) {// 编辑$.ajax({url: '/user',type: 'put',contentType: 'application/json',data: data}).then(res => {this.dialogVisible = false;this.loadTable(1);this.$message.success('修改成功！');})} else {// 新增$.ajax({url: '/user',type: 'post',contentType: 'application/json',data: data}).then(res => {this.dialogVisible = false;this.loadTable(1);this.$message.success('新增成功！');})}},del(id) {$.ajax({url: '/user/' + id,type: 'delete',contentType: 'application/json'}).then(res => {this.loadTable(1);this.$message.success('删除成功！');})},search() {this.loadTable(1);}}})
</script>
</body>
</html>