导出excel表格功能

/**
 * 导出excel 事件
 */
handleDownloadProjectData() {
  let _this = this;
  let tHeaderBase = ['项目编码', '项目名称', '组织架构','法人公司','曾用名','项目负责人',
    '管理模式','合作方','我方权益比','项目纬度','项目经度','项目地址'];
  let filterVal = ['code', 'name','oName','cName', 'alias','responsible',
    'mName','partner','share','latitude','longitude','address'];
  let sheetData1 = {};
  let exportData = {};
  sheetData1.titles = tHeaderBase;
  sheetData1.sheetName = "项目抬头数据";
  if(_this.multipleSelection.length!==0)
    sheetData1.data = _this.formatJson(filterVal, _this.multipleSelection);
  else
    sheetData1.data = _this.formatJson(filterVal,_this.tableData);

  exportData.sheetDatas = [];
  exportData.exportFileName = "项目抬头明细";
  exportData.sheetDatas.push(sheetData1);
  document.getElementById("exportData").value = JSON.stringify(exportData);
  let form = document.getElementById("exportForm");
  form.action = "http://52.80.16.80:10185/api/service/exportExcel";
  form.submit();
},
formatJson(filterVal, jsonData) {
  return jsonData.map(v => filterVal.map(j => v[j]))
},