前端基础知识

2.es6基础

3. vue

vue的生命周期

axios

切换nodejs

1. 下载npm
2. 下载需要的nodejs （nvm install 10.23.0 ） ，然后 use 选择下载的nodejs （ nvm use 10.23.0 ）
3. 查看npm下的所有nodejs ： nvm ls

初始化项目

修改成本地的

修改访问接口 修改为：

代码编写

举例说明：

1. 勾选复选框
   
2. 点击批量删除
   
   发生的请求：

<template>

<div class="app-container">


     <!--查询表单-->
     <div class="search-div">
      <el-form label-width="70px" size="small">
        <el-row>
          <el-col :span="24">
            <el-form-item label="部门名称">
              <el-input style="width: 100%" v-model="searchObj.name" placeholder="部门名称"></el-input>
            </el-form-item>
          </el-col>
        </el-row>
        <el-row style="display:flex">
          <el-button type="primary" icon="el-icon-search" size="mini" :loading="loading" @click="fetchData()">搜索</el-button>
          <el-button icon="el-icon-refresh" size="mini" @click="resetData">重置</el-button>

          <el-button type="success" icon="el-icon-plus" size="mini" :disabled="$hasBP('bnt.sysRole.add')  === false" @click="add">添 加</el-button>
        <el-button class="btn-add" size="mini" @click="batchRemove()" >批量删除</el-button>
        </el-row>
      </el-form>
    </div>


        <!-- 表格 -->
    <el-table
      v-loading="listLoading"
      :data="list"
      stripe
      border
      style="width: 100%;margin-top: 10px;"
      @selection-change="handleSelectionChange">  // 将复选框所在的值进行传递

      <el-table-column type="selection"/>  // 复选框 

      <el-table-column
        label="序号"
        width="70"
        align="center">
        <template slot-scope="scope">
          {{ (page - 1) * limit + scope.$index + 1 }}
        </template>
      </el-table-column>

      <el-table-column prop="name" label="部门名称" />
      <el-table-column prop="leader" label="负责人"/>
      <el-table-column prop="phone" label="电话" />
      <el-table-column prop="createTime" label="创建时间"/>

      <el-table-column label="操作" width="200" align="center">
        <template slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini" @click="edit(scope.row.id)" title="修改"/>
          <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeDataById(scope.row.id)" title="删除"/>
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页组件 -->
    <el-pagination
      :current-page="page"
      :total="total"
      :page-size="limit"
      :page-sizes="[5, 10, 20, 30, 40, 50, 100]"
      style="padding: 30px 0; text-align: center;"
      layout="sizes, prev, pager, next, jumper, ->, total, slot"
      @current-change="fetchData"
      @size-change="changeSize"
    />

    <!-- dialogVisible 这个值true 或 false 决定是否弹框   -->
    <el-dialog title="添加/修改" :visible.sync="dialogVisible" width="40%" >

      <el-form ref="dataForm" :model="sysdept" label-width="150px" size="small" style="padding-right: 40px;">

        <el-form-item label="部门名称">
          <el-input v-model="sysdept.name"/>
        </el-form-item>

        <el-form-item label="上级部门名称" prop="roleName ">
          <el-select v-model="sysdept.roleName" clearable>
            <el-option v-for="item in iconList" :key="item.name" :label="item.name" :value="item.name">
              <span style="padding-left: 6px;">{{ item.name }}</span>
            </el-option>
          </el-select>
        </el-form-item>

        <el-form-item label="负责人">
          <el-input v-model="sysdept.leader"/>
        </el-form-item>
        <el-form-item label="电话">
          <el-input v-model="sysdept.phone"/>
        </el-form-item>

      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false" size="small" icon="el-icon-refresh-right">取 消</el-button>
        <el-button type="primary" icon="el-icon-check" @click="saveOrUpdate()" size="small">确 定</el-button>
      </span>
    </el-dialog>

</div>


</template>


<script>
//引入定义接口js文件
import api from '@/api/system/sysDept'

export default {
    //vue代码结构
    //初始值
    data() {
        return {
            list:[],//角色列表
            page:1,//当前页
            limit:10,//每页显示记录数
            total:0,//总记录数

            searchObj:{},//条件对象

            selections:[],//多个复选框值

            sysdept:{},//封装表单角色数据

            dialogVisible:false, //是否弹框

            iconList: []
        }
    },
    created() { //渲染之前执行
        this.fetchData()
    },
    methods:{ 
        //选择复选框，把复选框所在行内容传递
        handleSelectionChange(selection) {
            this.selections = selection
            console.log(this.selections)
        },

        batchRemove(){
          var length =   this.selections.length 
          if(length == 0){
            this.$message.warning('请选择你要删除的数据')
            return
          }
          this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {
                var idList = [] ;
                this.selections.forEach( item => {
                   var id =  item.id
                   idList.push(id)
                });
                api.batchRemove(idList).then(response => {
                    this.$message.success(response.message || '操作成功')
                    this.fetchData() 
                })
            })

        },



            // 当页码发生改变的时候
            changeSize(size) {
            console.log(size)
            this.limit = size
            this.fetchData(1)
            },

        fetchData(current=1) {   // 没有传递值，默认等于1 ，
            this.page = current
            api.getPageList(this.page,this.limit,this.searchObj)
                .then(response => {   //得到接口返回的数据 response响应体  
                    this.list = response.data.records
                    this.total = response.data.total
                    // this.fetchData() 
                })
        },
    resetData(){
        this.searchObj.name = null ;
        this.fetchData()
    },
    add(){
        this.dialogVisible = true ;
        api.queryNmae().then(response => {
            this.iconList = response.data ;
        })

    },
    saveOrUpdate(){
        //根据id判断
        if (!this.sysdept.id) {//添加
                this.save()
            } else {//修改
                this.update()
            }
    },
    save(){
        api.saveRole(this.sysdept)
                .then(response => {
                    this.sysdept = {}
                    //提示
                    this.$message.success(response.message || '操作成功')
                    //关闭弹框
                    this.dialogVisible = false
                    //刷新页面
                    this.fetchData() 
                })
    },
    update(){
        api.updateById(this.sysdept)
                .then(response => {
                    this.sysdept = {}
                    //提示
                    this.$message.success(response.message || '操作成功')
                    //关闭弹框
                    this.dialogVisible = false
                    //刷新页面
                    this.fetchData()
                })
    },
    edit(id){
        this.dialogVisible = true
        api.queryid(id).then(response =>{
           this.sysdept = response.data
        })
    },
    removeDataById(id){
        api.removid(id).then(response =>{
            this.$message.success(response.message || '操作成功')
            this.fetchData()
        })
    }

}
}

</script>

token放入请求头

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