Spring+Vue增删改查实例

原创代码的路 2022-08-18

699

原文链接

代码地址

前端地址：https://github.com/Snowstorm0/SpringAndVue-vue

后端地址：https://github.com/Snowstorm0/SpringAndVue-spring

1 数据库

创建MySQL数据库。

表名为user_data，人员信息有number、name。

效果如下：

2 前端

2.1 创建项目

打开cmd，输入ui命令：

vue ui

若没有反应，可能是版本太低，需要卸载后重装：

npm uninstall vue-cli -g   #卸载
npm install @vue/cli -g    #安装

执行ui命令成功后，会出现提示：

🚀 Starting GUI…
🌠 Ready on http://localhost:8000

并会自动打开页面：

创建名为SpringAndVue-vue的项目，预设选择“手动”；功能开启 Babel、Router、Vuex、Linter/Formatter；配置选择“ESLint with error prevention only”；版本建议使用 “vue2.0”。创建新项目。

通过cd进入目录，启动项目：

npm run serve

2.2 安装插件

安装 element-ui 插件。

打开cmd，输入ui命令：

vue ui

在插件项搜索，并点击安装。

vue2.0 选择安装 “vue-cli-plugin-element”；vue3.0 选择安装 “vue-cli-plugin-element-plus”。

Terminal安装axios，每个新项目都需要安装：

# vue-cli2.0命令
npm install axios
# vue-cli3.0命令
npm add axios

2.3 添加模块

2.3.1 主页

在views文件夹下创建文件 HomePage.vue，内容如下：

<template>
    <div>
    用户列表
        <el-table
                :data="tableData"
                border
                style="width: 40%">
            <el-table-column
                    prop="number"
                    label="编号"
                    width="150">
            </el-table-column>
            <el-table-column
                    prop="name"
                    label="姓名"
                    width="150">
            </el-table-column>
            <el-table-column
                    fixed="right"
                    label="操作"
                    width="160">
                <template slot-scope="scope">
                    <el-button @click="handleClick(scope.row)" type="text" size="small">修改</el-button>
                    <el-button @click="deleteClick(scope.row)" type="text" size="small">删除</el-button>
                </template>
            </el-table-column>
        </el-table>


        <el-pagination
                background
                layout="prev, pager, next"
                :total="total"
                page-size="2"
                @current-change="page">
        </el-pagination>

    </div>
</template>

<script>
    import axios from 'axios';
    export default {
        name: "HomePage",
        methods: {
            handleClick(row) {
                this.$router.push({
                    path: '/useredit',
                    query:{
                        number: row.number,
                        name: row.name
                    }
                })
            },
            deleteClick(row){
                // var that=this;
                axios.delete('http://localhost:8081/homepage/delete/'+row.number).then(function (response) {
                    console.log(response)
                })
            },
            //当被点击页数的时候，跳转
            page(currPage){
                var that=this;
                axios.get('http://localhost:8081/homepage/query/'+(currPage-1)*3+'/3').then(function (response) {
                    that.tableData=response.data;
                })
            }
        },
        //被创建的时候，显示第一页
        created() {
            var that=this;
            axios.get('http://localhost:8081/homepage/query/0/3').then(function (response) {
                //给数据
                that.tableData=response.data;
                // console.log(response.data)
            }),
                axios.get('http://localhost:8081/homepage/all').then(function (response) {
                    //获得总长度
                    that.total=response.data.length ;
                })
        },
        data() {
            return {
                total: 10,
                tableData: [{
                    number: '编号',
                    name: '姓名'
                }]
            }
        }
    }
</script>
<style scoped>
</style>

2.3.2 查看用户

在views文件夹下创建文件：UserView.vue，内容如下：

<template>
    <div>
        <table>
            <tr>
                <td>编号</td>
                <td>姓名</td>
            </tr>
            <tr v-for="user in users"  :key="user">
                <td>{{user.number}}</td>
                <td>{{user.name}}</td>
            </tr>
        </table>
    </div>
</template>

<script>
    import axios from 'axios';
    export default {
        name: "UserView",
        data(){
            return {
                users:[
                    {
                        number: 1003,
                        name: '张三',
                    },
                    {
                        number: 1004,
                        name: '李四',
                    }
                ]
            }
        },
        created() {
            var that=this;
            axios.get('http://localhost:8081/homepage/view').then(function (resp) {
                that.users=resp.data;
            })
        }
    }
</script>
<style scoped>
</style>

2.3.3 添加用户

在views文件夹下创建文件：UserAdd.vue，内容如下：

<template>
    <div>
        <el-form :model="ruleForm" status-icon :rules="rules" ref="ruleForm" label-width="100px" class="demo-ruleForm">
            <el-form-item label="用户编号" prop="number">
                <el-input  v-model="ruleForm.number" ></el-input>
            </el-form-item>
            <el-form-item label="用户名" prop="name">
                <el-input v-model="ruleForm.name"></el-input>
            </el-form-item>
            <el-form-item>
                <el-button type="primary" @click="submitForm('ruleForm')">提交</el-button>
                <el-button @click="resetForm('ruleForm')">重置</el-button>
            </el-form-item>
        </el-form>
    </div>
</template>

<script>
    import axios from 'axios';
    export default {
        name: "UserAdd",
        data() {
            var validateNumber = (rule, value, callback) => {
                if (value === '') {
                    callback(new Error('请输入用户编号'));
                } else {
                    if (this.ruleForm.number !== '') {
                        //如果不为空
                    }
                    callback();
                }
            };
            var validateName = (rule, value, callback) => {
                if (value === '') {
                    callback(new Error('请输入用户名'));
                } else {
                    if (this.ruleForm.name !== '') {
                        //如果不为空
                    }
                    callback();
                }
            };
            return {
                ruleForm: {
                    number: '',
                    name: ''
                },
                rules: {
                    number: [
                        { validator: validateNumber, trigger: 'blur' }
                    ],
                    name: [
                        { validator: validateName, trigger: 'blur' }
                    ]
                }
            };
        },
        methods: {
            submitForm(formName) {
                var that=this;
                this.$refs[formName].validate((valid) => {
                    if (valid) {
                        //提交成功后要做的事情
                        // alert('submit!');
                        console.log(that.ruleForm)
                        axios.post('http://localhost:8081/homepage/add',that.ruleForm).then(function (response) {
                            console.log(response);
                        })
                    } else {
                        console.log('error submit!!');
                        return false;
                    }
                });
            },
            resetForm(formName) {
                this.$refs[formName].resetFields();
            }
        }
    }
</script>

<style scoped>

</style>

2.3.4 修改App

修改App.vue为：

<template>
  <div id="app">
    <el-container style="height: 500px; border: 1px solid #eee">
      <el-aside width="200px" style="background-color: rgb(238, 241, 246)">
        <el-menu :default-openeds="['1']" router>
          <el-submenu index="1">
            <template slot="title"><i class="el-icon-message"></i>用户管理</template>
            <el-menu-item-group>

              <el-menu-item index="/">首页</el-menu-item>
              <el-menu-item index="/userView">全部用户</el-menu-item>
              <el-menu-item index="/userAdd">添加用户</el-menu-item>
            </el-menu-item-group>

          </el-submenu>

        </el-menu>
      </el-aside>

      <el-container>
        <el-header style="text-align: right; font-size: 12px">
          <span>Snowstorm</span>
        </el-header>
        <br><br>
        <router-view></router-view>

      </el-container>
    </el-container>


  </div>
</template>

<style>
  .el-header {
    background-color: #B3C0D1;
    color: #333;
    line-height: 60px;
  }

  .el-aside {
    color: #333;
  }
</style>


<script>
  export default {
    data() {
      const item = {

      };
      return {
        tableData: Array(20).fill(item)
      }
    }
  };
</script>

2.3.5 修改index

在 router/index.js 中 const routes 函数修改为：

const routes = [
  {
    path: '/',
    name: '首页',
    component: HomePage
  },
  {
    path: '/userview',
    name: '全部用户',
    component: () => import(/* webpackChunkName: "user" */ '../views/UserView.vue')
   },
   {
    path: '/useradd',
    name: '添加用户',
    component: () => import(/* webpackChunkName: "user" */ '../views/UserAdd.vue')
   },
   {
    path: '/useredit',
    name: '编辑用户',
    component: () => import(/* webpackChunkName: "user" */ '../views/UserAdd.vue')
   }
]

3 后端

3.1 Controller

内容为：

@RestController
@RequestMapping("/homepage")
public class MyController {

    @Resource
    MyService myService;

    // 查看全部数据
    @GetMapping("/view")
    public List<UserDTO> userView(){
        return myService.userView();
    }

    // 增
    @PostMapping("/add")
    public int userAdd(@RequestBody UserDTO user){
        myService.userAdd(user);
        return 0;
    }

    // 删
    @DeleteMapping("/delete/{number}")
    public int deleteBook(@PathVariable("number") Integer number){
        return myService.userDelete(number);
    }
    // 改
    @PutMapping("/edit")
    public int userEdit(@RequestBody UserDTO user){
        return myService.userEdit(user);
    }
    // 查
    @GetMapping("/query/{start}/{length}")
    public List<UserDTO> userQuery(@PathVariable("start") Integer start,@PathVariable("length") Integer length){
        System.out.println("users:" + myService.userQuery(start, length) + "\n");
        return myService.userQuery(start, length);
    }
}

3.2 Service

内容为：

@Service
@EnableScheduling
public class MyServiceImpl implements MyService {
    @Resource
    MyMapper myMapper;
    // 返回全部用户类
    public List<UserDTO> userView(){
        System.out.println("users:" + myMapper.userView() + "\n");
        return myMapper.userView();
    }
    public Integer userAdd(UserDTO user){
        System.out.println("users:" + user + "\n");
        return myMapper.userAdd(user);
    }
    public Integer userDelete(int number){
        System.out.println("number:" + number + "\n");
        return myMapper.userDelete(number);
    }
    public Integer userEdit(UserDTO user){
        System.out.println("user:" + user + "\n");
        return myMapper.userEdit(user);
    }
    public List<UserDTO> userQuery(int start, int length){
        System.out.println("start:" + start + "high:" + length + "\n");
        return myMapper.userQuery(start, length);
    }
}

3.3 dao

内容为：

@Mapper
public interface MyMapper {
    List<UserDTO> userView();
    Integer userAdd(UserDTO user);
    Integer userDelete(int number);
    Integer userEdit(UserDTO user);
    List<UserDTO> userQuery(int start, int length);
}

3.4 model

文件名UserDTO，内容为：

@Data
public class UserDTO {
    private Integer number;
    private String name;
    public Integer getNumber() {
        return number;
    }
    public void setNumber(Integer number) {
        this.number = number;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

3.5 跨域配置

文件名Config，内容为：

@Configuration
public class Config implements WebMvcConfigurer {
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowedMethods("GET","HEAD","POST","DELETE","OPTIONS","PUT")
                .allowCredentials(true)
                .maxAge(3600)
                .allowedHeaders("*");
    }
}