wx.downloadFile({

      url: '地址?account='+this.data.account参数,

      success: res => {

        console.log('res',res)

        const filePath = res.tempFilePath;

        wx.saveFile({

          tempFilePath:filePath,

          success: result => {

            console.log('result', result.savedFilePath)

            const openFilePath = result.savedFilePath;

            wx.openDocument({ //我这里成功之后直接打开

              filePath: openFilePath,

              fileType: "xlsx",

              success: result => {

                console.log("打开文档成功");

              },

              fail: result => {

                console.log(result);

              }

            });

          }

        })

      }

    })