vue+element-ui 实现数据的增删改查以及分页（举例新增学生）

1.首先获取所有的学生信息并显示在表格上，进行分页。

后台要求传的参数：

后台接口封装：

element-ui创建数据。必须有HTML表格

<el-table :data="studentData" border style=" 100%">
  <el-table-column prop="id" label="学号"></el-table-column>
  <el-table-column prop="name" label="姓名"></el-table-column>
  <el-table-column prop="age" label="年龄"></el-table-column>
  <el-table-column prop="sex" label="性别"></el-table-column>
  <el-table-column prop="major" label="专业"></el-table-column>
  <el-table-column prop="depart" label="院系"></el-table-column>
  <el-table-column prop="term" label="学期"></el-table-column>
  <el-table-column prop="year" label="年级"></el-table-column>
  <el-table-column prop="role" label="角色"></el-table-column>
  <el-table-column label="操作">
    <template scope="scope">
      <el-button type="primary" size="small" @click="studentEdit(scope.$index, scope.row)">编辑</el-button>
      <el-button type="danger" size="small" @click="studentDelete(scope.row)">删除</el-button>     //scope.row代表当前对应行
    </template>
  </el-table-column>
</el-table>
<div   style="height:70px;">
  <el-pagination
    @size-change="sizeChange"
    @current-change="currentChange"
    :page-sizes="[10,20,30,40]"
    :page-size="page.pageSize"
    layout="total, sizes, prev, pager, next"
    :total="page.totalRecords">
  </el-pagination>
</div>
//新增学生信息模态框

<el-dialog title="新增学生信息" :visible="addstudentForm" size="tiny" :modal-append-to-body='false' @close='closeDialog'>
  <el-form   ref="addsForm" :model="addsForm" label-width="80px">
    <el-form-item label="学号" prop="id">
      <el-input  v-model="addsForm.id" max-length="10"></el-input>
    </el-form-item>
    <el-form-item label="姓名" prop="name">
      <el-input v-model="addsForm.name"></el-input>
    </el-form-item>
    <el-form-item label="年龄" prop="age">
      <el-input v-model="addsForm.age"></el-input>
    </el-form-item>
    <el-form-item label="性别" prop="sex">
      <el-input v-model="addsForm.sex"></el-input>
    </el-form-item>
    <el-form-item label="专业" prop="major">
      <el-input v-model="addsForm.major"></el-input>
    </el-form-item>
    <el-form-item label="院系" prop="depart">
      <el-input v-model="addsForm.depart"></el-input>
    </el-form-item>
    <el-form-item label="学期">
      <el-select v-model="addsForm.term" value-key="id">
        <el-option v-for="item in termArry"  :key="item.id" :label="item.name" :value="item.id"></el-option>
      </el-select>
    </el-form-item>
    <el-form-item label="年级" prop="year">
      <el-input v-model="addsForm.year"></el-input>
    </el-form-item>
    <el-form-item label="角色" prop="role">
      <el-input v-model="addsForm.role" disabled="disabled"></el-input>
    </el-form-item>
    <el-form-item>
      <el-button type="primary" @click="studentAdd()">确定</el-button>
      <el-button @click="addstudentForm = false;canceladdT('formt')">取消</el-button>
    </el-form-item>
  </el-form>
</el-dialog>

//编辑学生信息模态框

<el-dialog title="编辑学生信息" :visible="editstudentForm" size="tiny" :modal-append-to-body='false' @close='closeDialog'>
  <el-form ref="editsForm" :model="editsForm" label-width="80px">
    <el-form-item label="学号">
      <el-input  v-model="editsForm.id" max-length="10" disabled="disabled"></el-input>
    </el-form-item>
    <el-form-item label="姓名">
      <el-input v-model="editsForm.name"></el-input>
    </el-form-item>
    <el-form-item label="年龄">
      <el-input v-model="editsForm.age"></el-input>
    </el-form-item>
    <el-form-item label="性别">
      <el-input v-model="editsForm.sex"></el-input>
    </el-form-item>
    <el-form-item label="专业">
      <el-input v-model="editsForm.major"></el-input>
    </el-form-item>
    <el-form-item label="院系">
      <el-input v-model="editsForm.depart"></el-input>
    </el-form-item>
    <el-form-item label="学期">
      <el-select v-model="editsForm.term" value-key="id">
        <el-option v-for="item in termArry"  :key="item.id" :label="item.name" :value="item.id"></el-option>
      </el-select>
    </el-form-item>
    <el-form-item label="年级">
      <el-input v-model="editsForm.year"></el-input>
    </el-form-item>
    <el-form-item label="角色">
      <el-input v-model="editsForm.role" disabled="disabled"></el-input>
    </el-form-item>
    <el-form-item label="密码">
      <el-input v-model="editsForm.passwd" disabled="disabled"></el-input>
    </el-form-item>
    <el-form-item>
      <el-button type="primary" @click="studentcEdit()">确定</el-button>
      <el-button @click="editstudentForm = false">取消</el-button>
    </el-form-item>
  </el-form>
</el-dialog>

export default{
data(){
return{
　　studentData:[],  //所有学生信息数组置空

addstudentForm:false, //新增学生信息模态框

page: {
  pageSize: 10, //每页条数,  默认10条
  totalRecords: 0, //总条数
  totalPages: 0, //总页数
  pageNum:0
},

addsForm:{
  id:'',
  name:'',
  age:"",
  sex:'',
  major:'',
  depart:'',
  term:'',
  year:'',
  role:'0'
},

editsForm:{
  id:'',
  name:'',
  age:"",
  sex:'',
  major:'',
  depart:'',
  term:'',
  year:'',
  role:'0',
  passwd:''
},

}
}

mounted(){
　　this.init() //页面内初始加载就调用这个函数
}
methods:{
init(){
this.studentData = [],

let {pageNum,pageSize} = this.page; //es6写法
 // pageNum:页数从0开始
//pageSize:每页显示10条

this.$http.get(Main.getStudent(pageNum,pageSize)).then(res =>{
  let {errCode,errMsg}=res.data;
  this.page.totalRecords=res.data.totalRecords; //总条数
  if(errCode==0){
    const studentArray=res.data.dataList;
    this.studentData=studentArray;
  }else{
      alert(errMsg);
  }
}, response => {
})

}

// 每页显示多少条数据
sizeChange(val) {
  this.page.pageSize = val;
  this.init();
},
//翻页
currentChange(val) {
  this.page.pageNum=val-1;
  console.log(this.page.pageNum);
  this.init();
},

// 点击模态框关闭按钮关闭模态框
closeDialog(){
  this.addstudentForm = false;
  this.editstudentForm = false;
},

//新增数据条数
//新增学生信息后台提交参数

// 点击新增按钮
addStudent(){
    this.addstudentForm = true;   //原来隐藏的新增信息模态框显示
},

// 点击新增学生信息模态框的确定按钮（确定新增信息） 将所增信息提交给后台
studentAdd(){
    let studentList=this.addsForm;  
    let {id,name,age,sex,major,depart,term,year} = studentList;
//判断数据是否为空
    if(id==''||name==''||age==''||sex==''||major==''||depart==''||term==''||year==''){
      this.$message.error('新增内容每一项都不准为空')
    }else{
//每一条都不为空时才向后台发送http请求
      this.$http.post(Main.addStudent(),this.addsForm).then(res => {
        let {errCode,errMsg} = res.data;
        if(!errCode==1){
          this.$set(this.addsForm,{});
          this.init();   //重新渲染数据列表
          this.addstudentForm = false;
        }else{
          this.$message.error(errMsg);  //弹出后台返回错误
        }

      }, response => {
      });
    }
},

//编辑修改数据和新增数据不一样的地方在于，编辑要获得原有数据在原有数据上面修改
//编辑修改信息需要向后台提交的参数

// 点击编辑按钮
studentEdit(index,row){
    this.editstudentForm = true; //编辑信息模态框显示
    this.editsForm = Object.assign({}, row);  获得所有数据显示在编辑信息模态框里面
},

// 点击编辑信息弹框的确定按钮
studentcEdit(){
  let studenteList=this.editsForm;
  console.log(studenteList);
  let {name,age,sex,major,depart,term,year} = studenteList;
  if(name==''||age==''||sex==''||major==''||depart==''||term==''||year==''){
    this.$message.error("修改内容除了不可编辑的每一项都不准为空")
  }else{
    this.$http.put(Main.changeStudenet(),this.editsForm).then(res => {
      let {errCode,errMsg} = res.data;
      if(!errCode==1){
        this.init();
        this.editstudentForm  = false;
      }else{
        this.$message.error(errMsg);
      }
    }, response => {

    });
  }
},

//删除当前对应行数据
//后台传 id和role进行删除

studentDelete(user){
  this.$confirm('此操作将永久删除学生 ' + user.name + ', 是否继续?', '提示', { type: 'warning' })
    .then(() => { // 向服务端请求删除
      this.$http.delete(Main.deleteStudent(user.id,0)).then((response) => {
        this.$message.success('成功删除了学生' + user.name + '!');this.init()})
        .catch((response) => {
          this.$message.error('删除失败!');
        });
    }) .catch(() => {
    this.$message.info('已取消操作!');
  });
},

}

}，
//页面图效果

分页

编辑

删除：

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