1.引入工具库

npm install -S file-saver xlsx

npm install -D script-loader

2.Element 上传控件

<el-upload class="upload-demo" style="display: inline-block;" action="" :on-change="leading"
                    :show-file-list="false" accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,application/vnd.ms-excel"
                    :auto-upload="false">
                    <el-button type="primary" icon="el-icon-upload" circle size="mini"></el-button>
                  </el-upload>

limitUpload = 1 限制只能上传1个文件
accept 为默认打开的可上传的文件格式
:show-file-list="false" 不展示列表
action="" 因为导入，不用写上传路径，只用功能就可以

3. methods

      leading(file, fileList) { // 导入
        this.importfxx(file.raw)
      },
      importfxx(obj) { //导入方法
        // 通过DOM取文件数据
        let _this = this
        let rABS = false; //是否将文件读取为二进制字符串
        let f = obj
        let reader = new FileReader();
        //if (!FileReader.prototype.readAsBinaryString) {
        FileReader.prototype.readAsBinaryString = function(f) {
          let binary = "";
          let rABS = false; //是否将文件读取为二进制字符串
          let pt = this;
          let wb; //读取完成的数据
          let outdata;
          let reader = new FileReader();
          reader.onload = function(e) {
            let bytes = new Uint8Array(reader.result);
            let length = bytes.byteLength;
            for (let i = 0; i < length; i++) {
              binary += String.fromCharCode(bytes[i]);
            }
            let XLSX = require('xlsx');
            if (rABS) {
              wb = XLSX.read(btoa(fixdata(binary)), { //手动转化
                type: 'base64'
              });
            } else {
              wb = XLSX.read(binary, {
                type: 'binary'
              });
            }
            outdata = XLSX.utils.sheet_to_json(wb.Sheets[wb.SheetNames[0]]); //outdata就是你想要的东西
   console.log(outdata )


//因为此时outdata 格式为
//[  "单位": "a",
//    "测点名称": "b",
 //    "描述": "c",
//     "测点类型": "d",
 //    "保留小数位": "e",
  //    "默认值": "f",
   //   "排序": "j"
//]
//以下方法可以改变为
// [
 //  "dataUnit": "a",
//    "dataName": "b",
 //    "dataDesc": "c",
 //    "dataType": "d",
 //    "dataDecimals": "e",
  //    "defaultValue": "f",
   //   "dictSort": "j"
//]  
     //改变对象key方法
              // let result = outdata.map(o=>{return{
              //dataUnit:o['单位'],
              //dataName:o["测点名称"],
              // dataDesc:o["描述"],
              //dataType:o["测点类型"],
              //dataDecimals:o["保留小数位"],
              // defaultValue:o["默认值"],
              //dictSort:o["排序"],
              //  }});
             //console.log(result )
          }
          reader.readAsArrayBuffer(f);
        }

        if (rABS) {
          reader.readAsArrayBuffer(f);
        } else {
          reader.readAsBinaryString(f);
        }
      },