(辦公)vue下載excel,後臺用post方法

　　後臺方法的參數必須是@RequestBody修飾的。

      前臺關鍵代碼:

axios ( {
          method : 'post',
          url : api.exportPlayTime , // 請求地址
          data : {
            choose : type,
            begindate : startDate,
            enddate : endDate
          },
          responseType : 'arraybuffer',
          observe: 'response',
        } )
          .then ( ( res ) => {

            const fileName = ""+filename+".xlsx"
            let blob = new Blob([res.data], {type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"});
            if ( 'download' in document.createElement ( 'a' ) ) { // 非IE下載
              const elink = document.createElement ( 'a' )
              elink.download = fileName
              elink.style.display = 'none'
              elink.href = URL.createObjectURL ( blob )
              document.body.appendChild ( elink )
              elink.click ()
              URL.revokeObjectURL ( elink.href ) // 釋放URL 對象
              document.body.removeChild ( elink )
            } else { // IE10+下載
              navigator.msSaveBlob ( blob, fileName )
            }

          })

download(data) {
        if (!data) {
          return
        }
        let url = window.URL.createObjectURL(new Blob([data]))
        let link = document.createElement('a')
        link.style.display = 'none'
        link.href = url
        link.setAttribute('download', 'excel.xlsx')

        document.body.appendChild(link)
        link.click()
      },