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关于程序员:SpringVue增删改查实例

jiezi

原文链接

代码地址

前端地址：https://github.com/Snowstorm0…

后端地址：https://github.com/Snowstorm0…

1 数据库

创立 MySQL 数据库。

表名为 user_data，人员信息有 number、name。

成果如下：

2 前端

2.1 创立我的项目

关上 cmd，输出 ui 命令：

vue ui

若没有反馈，可能是版本太低，须要卸载后重装：

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

执行 ui 命令胜利后，会呈现提醒：

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

并会主动关上页面：

创立名为 SpringAndVue-vue 的我的项目，预设抉择“手动”；性能开启 Babel、Router、Vuex、Linter/Formatter；配置抉择“ESLint with error prevention only”；版本倡议应用“vue2.0”。创立新我的项目。

通过 cd 进入目录，启动我的项目：

npm run serve

2.2 装置插件

装置 element-ui 插件。

关上 cmd，输出 ui 命令：

vue ui

在插件项搜寻，并点击装置。

vue2.0 抉择装置“vue-cli-plugin-element”；vue3.0 抉择装置“vue-cli-plugin-element-plus”。

Terminal 装置 axios，每个新我的项目都须要装置：

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

2.3 增加模块

2.3.1 主页

在 views 文件夹下创立文件 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"> 批改 </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;})
            }
        },
        // 被创立的时候，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) {
                    // 取得总长度
                    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 文件夹下创立文件：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 增加用户

在 views 文件夹下创立文件：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('请输出用户编号'));
                } else {if (this.ruleForm.number !== '') {// 如果不为空}
                    callback();}
            };
            var validateName = (rule, value, callback) => {if (value === '') {callback(new Error('请输出用户名'));
                } 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.$refs[formName].validate((valid) => {if (valid) {
                        // 提交胜利后要做的事件
                        // alert('submit!');
                        console.log(that.ruleForm)
                        axios.post('http://localhost:8081/homepage/add',that.ruleForm).then(function (response) {console.log(response);
                        })
                    } else {console.log('error submit!!');
                        return false;
                    }
                });
            },
            resetForm(formName) {this.$refs[formName].resetFields();}
        }
    }
</script>

<style scoped>

</style>

2.3.4 批改 App

批改 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> 用户治理 </template>
            <el-menu-item-group>

              <el-menu-item index="/"> 首页 </el-menu-item>
              <el-menu-item index="/userView"> 全副用户 </el-menu-item>
              <el-menu-item index="/userAdd"> 增加用户 </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 批改 index

在 router/index.js 中 const routes 函数批改为：

const routes = [
  {
    path: '/',
    name: '首页',
    component: HomePage
  },
  {
    path: '/userview',
    name: '全副用户',
    component: () => import(/* webpackChunkName: "user" */ '../views/UserView.vue')
   },
   {
    path: '/useradd',
    name: '增加用户',
    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;

    // 查看全副数据
    @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;
    // 返回全副用户类
    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("*");
    }
}

4 运行成果

4.1 主页

4.2 全副用户

4.3 增加用户

 
 

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