Detailed explanation of how el-upload implements uploading Excel files

<template>
  <p class="panel admin-panel">
    <p class="panel-head" id="add"><strong><span class="el-icon-edit"></span><span class="title">上传数据</span></strong></p>
    <p class="body-content">
      <el-form :model="ruleForm" ref="ruleForm" label-width="100px" class="form uploadform">
        <el-form-item label="部门" prop="name">
          <el-select v-model="form.type" placeholder="请选择" style="width: 135px">
            <el-option
                v-for="item in options"
                :key="item.value"
                :label="item.label"
                :value="item.value">
            </el-option>
          </el-select>
        </el-form-item>

        <el-form-item>

          <el-upload
              class="upload-demo"
              ref="upload"
              action="http://10.1.20.218:8088/gnh-webadmin-platfrom/api/v1/sendSalaryBillGeinihua"
              :on-preview="handlePreview"
              :before-upload="beforeAvatarUpload"
              :on-remove="handleRemove"
              :file-list="fileList"
              :auto-upload = &#39;false&#39;
              :on-success = &#39;handleSuccess&#39;
              :data="form"
              name="salaryBill">
            <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
            <el-button style="margin-left: 10px;" size="small" type="success" @click="submitUpload">上传到服务器</el-button>
            <p slot="tip" class="el-upload__tip">只能上传xls/xlsx文件</p>
          </el-upload>

        </el-form-item>
      </el-form>
    </p>
  </p>
</template>
<script>
  export default {
    data() {
      return {
        options: [{
          value: &#39;1&#39;,
          label: &#39;帅哥部&#39;
        }, {
          value: &#39;2&#39;,
          label: &#39;美女部&#39;
        }],
        fileName:&#39;&#39;,
        fileList:[],
        ruleForm: {
//          name: &#39;&#39;,
          isShow: &#39;0&#39;
        },
        form:{
          type:&#39;1&#39;
        },

      };
    },
    methods: {
      submitUpload() {
        this.$refs.upload.submit();
      },

      beforeAvatarUpload(file) {

        let Xls = file.name.split(&#39;.&#39;);

        if(Xls[1] === &#39;xls&#39;||Xls[1] === &#39;xlsx&#39;){
          return file
        }else {
          this.$message.error(&#39;上传文件只能是 xls/xlsx 格式!&#39;)
          return false
        }

      },
      handleRemove(file, fileList) {
      },
      handlePreview(file) {
      },
      handleSuccess(res,file,fileList){

        if(res.code===20000){
          this.$message({
            message: &#39;上传成功！&#39;,
            type: &#39;success&#39;
          });
        }else {
          this.$message({
            message: res.msg,
            type: &#39;error&#39;
          });
        }

      }
    }
  }
</script>
<style scope>
  input[type="file"] {
    display: none;
  }
  .el-upload-list{
    width: 200px;
  }
  .el-select {
    width: 135px;
  }

</style>