ElementUIV12相关使用方法

今日内容

零、复习昨日

零、复习昨日

一、Element UI

Element，一套为开发者、设计师和产品经理准备的基于 Vue 2.0 的桌面端组件库

官网： https://element.eleme.cn/#/zh-CN

Element Plus,基于 Vue 3，面向设计师和开发者的组件库

官网: https://element-plus.gitee.io/zh-CN/

二安装&入门使用

2.1 创建vue项目

命令行创建
界面创建

过程略…

创建完项目,idea打开

2.2 安装ElementUI

npm install element-ui -S

2.3 项目中引入

引入Element

// main.js
import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';

Vue.use(ElementUI);

// ...其他以前的东西...

2.4 测试

新建文件,Element官网复制代码,启动访问即可

三、常用组件

3.1 布局

3.2 容器

3.3 单选

3.4 复选框

3.5 输入框

3.6 下拉框

3.7 日期

3.8 上传

3.9 表单

3.10 表格

3.11 弹框

四、练习

4.1 登录页

项目启动访问登录，修改路由

编写登录页面

<template>
  <div>
    <el-row>
      <el-col :span="8" :offset="8">
        <h1>登录页面</h1>
        <el-form ref="form" :model="form" label-width="80px">
          <el-form-item label="用户名">
            <el-input v-model="form.username"></el-input>
          </el-form-item>
          <el-form-item label="密码">
            <el-input v-model="form.password" type="password"></el-input>
          </el-form-item>
          <el-form-item>
            <el-button type="primary" @click="onSubmit">登录</el-button>
          </el-form-item>
        </el-form>
      </el-col>
    </el-row>
  </div>
</template>

<script>
import axios from 'axios'
export default {
  name: 'Login',
  data() {
    return {
      form: {
        username: '',
        password: ''
      }
    }
  },
  methods: {
    onSubmit() {
      axios.get('/login',{
        params: {
          username: this.form.username,
          password: this.form.password,
        }
      }).then(res => {
        console.log('登录返回',res)
        if (res.code == 2000) {
          this.$message({
            message: '恭喜你，登录成功',
            type: 'success',
            duration:600
          });
        } else {
          this.$message({
            message: '用户名或密码错误,登录失败',
            type: 'error',
            duration:600
          });
        }
      })
    }
  }
}
</script>

<style scoped>

</style>

配置axios，在main。js中定义

// 基础路径
axios.defaults.baseURL = 'http://localhost:8080/day39';

// 添加响应拦截器
axios.interceptors.response.use(function (response) {
  return response.data;// 取出R
}, function (error) {
  return Promise.reject(error);
});

4.2 主页

创建主页面，填充布局容器

<template>
  <div>
    <!--最外层容器-->
    <el-container class="max-container">
      <!--头部-->
      <el-header>用户管理系统后端</el-header>
      <!--内部容器-->
      <el-container>
        <!--侧边-->
        <el-aside width="200px">

          <!--:default-openeds="['1']" 默认打开-->
          <el-menu >
            <el-submenu index="1">
                <template slot="title"><i class="el-icon-message"></i>用户管理</template>
                <el-menu-item index="1-1">选项1</el-menu-item>
                <el-menu-item index="1-2">选项2</el-menu-item>
            </el-submenu>
            <el-submenu index="2">
              <template slot="title"><i class="el-icon-menu"></i>角色管理</template>
              <el-menu-item index="1-1">选项1</el-menu-item>
              <el-menu-item index="1-2">选项2</el-menu-item>
            </el-submenu>
            <el-submenu index="3">
              <template slot="title"><i class="el-icon-setting"></i>系统设置</template>
              <el-menu-item index="1-1">选项1</el-menu-item>
              <el-menu-item index="1-2">选项2</el-menu-item>
            </el-submenu>
          </el-menu>

        </el-aside>
        <!--小容器-->
        <el-container>
          <!--主要界面-->
          <el-main>Main</el-main>
          <!--页脚-->
          <el-footer>© 2024 Java2403ByTaotie Copyright</el-footer>
        </el-container>
      </el-container>
    </el-container>
  </div>
</template>

<script>
export default {
  name: 'Admin'
}
</script>

<style scoped>
.max-container {
  height: 710px;
}

.el-header, .el-footer {
  background-color: #B3C0D1;
  color: #333;
  text-align: center;
  line-height: 60px;
}

.el-aside {
  background-color: #D3DCE6;
  color: #333;
  text-align: center;
  line-height: 200px;
}

.el-main {
  background-color: #E9EEF3;
  color: #333;
  text-align: center;
  line-height: 160px;
}

body > .el-container {
  margin-bottom: 40px;
}

.el-container:nth-child(5) .el-aside,
.el-container:nth-child(6) .el-aside {
  line-height: 260px;
}

.el-container:nth-child(7) .el-aside {
  line-height: 320px;
}
</style>

登录成功后，路由跳转到这个页面

4.3 退出按钮

头部添加按钮，以及事件，路由回到登录页

4.4 存储、销毁登录状态

先在Vuex中设置好存储登录的user值,以及设置准备修改user数据的函数

登录时存入

退出时销毁

设置路由守护拦截

// 完整的router/index.js代码

import Vue from 'vue'
import VueRouter from 'vue-router'
import LoginView from "@/views/LoginView.vue";
import AdminView from "@/views/AdminView.vue";
import store from '@/store'

Vue.use(VueRouter)

const routes = [
  {
    path: '/',
    name:'Login',
    component: LoginView
  },
  {
    path: '/admin',
    name:'Admin',
    component: AdminView
  },
]

const router = new VueRouter({
  mode: 'history',
  base: process.env.BASE_URL,
  routes
})
router.beforeEach((to, from, next) => {
  if (to.name !== 'Login') {
    console.log("这是路由守卫取出Vuex中数据User",store.state.user.username)
    if(store.state.user.username){
      next()
    } else {
      next({ name: 'Login' })
    }
  }else {
    next()
  }
})
export default router

// Vuex要持久化

安装插件
```
	npm install vuex-persistedstate
```

配置

在/src/store/index.js中实现配置

import Vue from 'vue'
import Vuex from 'vuex'
// 1引入持久化插件
import vuexPersistedstate from "vuex-persistedstate";

Vue.use(Vuex)
export default new Vuex.Store({
    // ...
    ,
    plugins:[vuexPersistedstate()] // 2加入插件
})

4.5 用户界面路由展示

设置路由入口,

设置路由规则,用户界面是设置AdminView中的,属于嵌套路由,所以要设置路由子路径

设置路由展示,在主界面的Main中

4.6 用户页面布局

<template>
<div>
  <el-card class="box-card" :body-style="{ padding: '15px',height:'30px' }">
    <el-form :inline="true" :model="formInline" class="demo-form-inline">
      <el-form-item label="用户名">
        <el-input v-model="formInline.username" placeholder="用户名"></el-input>
      </el-form-item>
      <el-form-item label="手机号">
        <el-input v-model="formInline.phone" placeholder="手机号"></el-input>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" @click="onSubmit">查询</el-button>
      </el-form-item>
    </el-form>
  </el-card>
  <el-card class="box-card">
    <el-table
        :data="tableData"
        style="width: 100%">
      <el-table-column
          prop="date"
          label="日期"
          width="180">
      </el-table-column>
      <el-table-column
          prop="name"
          label="姓名"
          width="180">
      </el-table-column>
      <el-table-column
          prop="address"
          label="地址">
      </el-table-column>
    </el-table>
  </el-card>
  <el-card class="box-card" :body-style="{ padding: '15px',height:'30px'}">
    <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="currentPage4"
        :page-sizes="[100, 200, 300, 400]"
        :page-size="100"
        layout="total, sizes, prev, pager, next, jumper"
        :total="400">
    </el-pagination>
  </el-card>
</div>
</template>

<script>
export default {
  name:"User",
  data(){
    return {
      formInline: {
        username: '',
        phone: ''
      },
      tableData: [{
        date: '2016-05-02',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1518 弄'
      }, {
        date: '2016-05-04',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1517 弄'
      }, {
        date: '2016-05-01',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1519 弄'
      }, {
        date: '2016-05-03',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1516 弄'
      }, {
        date: '2016-05-03',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1516 弄'
      }, {
        date: '2016-05-03',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1516 弄'
      }, {
        date: '2016-05-03',
        name: '王小虎',
        address: '上海市普陀区金沙江路 1516 弄'
      },]
    }
  }
}
</script>

<style scoped>
.box-card {
  width: 100%;
  margin-top: 10px;
}
</style>

注意: 此时只是布局,真正完整效果后续改动…

4.7 查询全部用户

UserView页面加载时查询全部,设置钩子函数,查询全部,设置表格数据

<template>
<div>
  <!--搜索卡片-->
  <el-card class="box-card" :body-style="{ padding: '15px',height:'30px' }">
    <el-form :inline="true" :model="formInline" class="demo-form-inline">
      <el-form-item label="用户名">
        <el-input v-model="formInline.username" placeholder="用户名"></el-input>
      </el-form-item>
      <el-form-item label="手机号">
        <el-input v-model="formInline.phone" placeholder="手机号"></el-input>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" @click="onSubmit">查询</el-button>
      </el-form-item>
    </el-form>
  </el-card>

  <!--表格数据卡片-->
  <el-card class="box-card">
    <el-table :data="userList" style="width: 100%">
      <el-table-column type="selection" width="55"></el-table-column>
      <el-table-column prop="id" label="编号" width="75"></el-table-column>
      <el-table-column prop="username" label="用户名" width="100"></el-table-column>
      <el-table-column prop="password" label="密码" width="100"></el-table-column>
      <el-table-column prop="phone" label="手机号" width="140"></el-table-column>
      <el-table-column prop="createTime" label="注册时间" width="180"></el-table-column>
      <el-table-column prop="money" label="余额" width="140"></el-table-column>
      <el-table-column prop="sex" label="性别" width="100"></el-table-column>
      <el-table-column label="操作">
        <template slot-scope="scope">
          <el-button
              size="mini"
              @click="handleEdit(scope.$index, scope.row)">编辑</el-button>
          <el-button
              size="mini"
              type="danger"
              @click="handleDelete(scope.$index, scope.row)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>
  </el-card>
  <!--分页卡片-->
  <el-card class="box-card" :body-style="{ padding: '15px',height:'30px'}">
    <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="currentPage4"
        :page-sizes="[100, 200, 300, 400]"
        :page-size="100"
        layout="total, sizes, prev, pager, next, jumper"
        :total="400">
    </el-pagination>
  </el-card>
</div>
</template>

<script>
import axios from 'axios'
export default {
  name:"User",
  data(){
    return {
      formInline: {
        username: '',
        phone: ''
      },
      userList: [{
        id: '',
        username: '',
        password: '',
        phone: '',
        createTime: '',
        money: null,
        sex: '',
      }]
    }
  },
  methods: {
    findAll(){
      axios.get('/findAll')
          .then(res => {
            if (res.code == 2000) {
              this.userList = res.data
            }
          })
    }
  }
  ,
  mounted() {
    this.findAll()
  }
}
</script>

<style scoped>
.box-card {
  width: 100%;
  margin-top: 10px;
}
</style>

ps: 日期演示问题,后端可以将日期注解换成@JsonFormat(pattern = “yyyy-MM-dd”)即可

4.8 分页展现

修改UserView页面的js代码

<script>
import axios from 'axios'
export default {
  name:"User",
  data(){
    return {
      formInline: {
        username: '',
        phone: ''
      },
      userList: [{
        id: '',
        username: '',
        password: '',
        phone: '',
        createTime: '',
        money: null,
        sex: '',
      }],
      currentPage:1,// 当前页面
      total:0, // 总条数
      pageNum:1,// 当前页面
      pageSize:5// 每页大小
    }
  },
  methods: {
    findAll(pageNum,pageSize){
      axios.get('/findAll',{
        params:{
          pageNum:pageNum,
          pageSize:pageSize
        }
      }).then(res => {
        if (res.code == 2000) {
          console.log(res.data)// 返回的是后端返回的PageInfo
          this.userList = res.data.list
          this.total = res.data.total
          this.pageNum = res.data.pageNum
        }
      }).catch(error => {
        console.log('请求查询全部报错: ',error)
      })
    },
    onSubmit(){},
    handleSizeChange(val) { // 处理页面大小改变时触发
      this.pageSize = val;
      this.findAll(this.pageNum,val)
    },
    handleCurrentChange(val) {// 当前页码改变时触发
      this.pageNum = val;
      this.findAll(val,this.pageSize)
    }
  },
  mounted() {
    this.findAll(1,5) // 初始时查询,第1页,每页5条
  }
}
</script>

4.9 模糊查询

页面上面设置搜索和重置按钮

js中设置事件,搜索

后端SpringBoot要设置动态sql

.data.total
this.pageNum = res.data.pageNum
}
}).catch(error => {
console.log('请求查询全部报错: ',error)
})
},
onSubmit(){},
handleSizeChange(val) { // 处理页面大小改变时触发
this.pageSize = val;
this.findAll(this.pageNum,val)
},
handleCurrentChange(val) {// 当前页码改变时触发
this.pageNum = val;
this.findAll(val,this.pageSize)
}
},
mounted() {
this.findAll(1,5) // 初始时查询,第1页,每页5条
}
}


## 4.9 模糊查询

页面上面设置搜索和重置按钮

[外链图片转存中...(img-2XjszJ6V-1721010967411)]

js中设置事件,搜索

[外链图片转存中...(img-gBYMYmQv-1721010967411)]



后端SpringBoot要设置动态sql

[外链图片转存中...(img-YlU7dO6p-1721010967412)]