后端返回数据流格式，前端无法捕获到错误信息

 Source/UBCS-WEB/src/components/Master/MasterTransfer.vue

@@ -120,6 +120,22 @@
  mounted() {
  },
  methods: {
    handlerFile(res){
      let reader = new FileReader();
      reader.readAsText(res.data);
      reader.onload =  (result) =>{
        try {
          let resData = JSON.parse(result.target.result);  // 解析对象成功
          if (resData.code != 200) {
            this.$message.error(resData.msg);
          }
        } catch (err) {
          // console.log("err",err)// 解析成对象失败，说明是正常的文件流
          func.downloadFileByBlobHandler(res);
          this.$message.success('下载成功，请查看！');
        }
      };
    },
    escHandler() {
      this.$emit('update:visible', false);
      this.value = [];
@@ -157,10 +173,8 @@
              'conditionMap[oid]': this.ids, ...this.exportArrTwo,
              limit: -1
            }).then(res => {
              if (res) {
                func.downloadFileByBlobHandler(res);
                this.escHandler()
              }
                this.handlerFile(res);
                this.escHandler();
            })
          } else {

@@ -169,10 +183,9 @@
              'conditionMap[oid]': this.ids, ...this.exportArr
            }).then(res => {
              // console.log('res',res)
              if (res) {
                func.downloadFileByBlobHandler(res);
                this.escHandler()
              }
                this.handlerFile(res);
                this.escHandler();

            })

          }
@@ -186,15 +199,13 @@
          exportCode({codeClassifyOid: this.codeClassifyOid, ...this.exportArrTwo, limit: -1}).then(res => {
            if (res) {
              func.downloadFileByBlobHandler(res);
              this.escHandler()
              this.escHandler();
            }
          })
        } else {
          exportCode({codeClassifyOid: this.codeClassifyOid, ...this.exportArr, limit: -1}).then(res => {
            if (res) {
              func.downloadFileByBlobHandler(res);
              this.escHandler()
            }
              this.handlerFile(res);
              this.escHandler();
          })
        }
      } else if (this.radio === 2) {
@@ -230,10 +241,9 @@
            endPage: end
          }).then((res) => {
            // console.log('res',res)
            if (res) {
              func.downloadFileByBlobHandler(res);
              this.escHandler()
            }
              this.handlerFile(res);
              this.escHandler();

          });
        } else {
          this.tableHeadData.map(item => item.prop)
@@ -246,11 +256,9 @@
            page: start,
            endPage: end
          }).then(res => {
            // console.log('res',res)
            if (res) {
              func.downloadFileByBlobHandler(res);
              this.escHandler()
            }
            console.log('res',res)
              this.handlerFile(res);
              this.escHandler();
          })
        }
      }

 Source/UBCS-WEB/src/components/MasterCrud/VciMasterCrud.vue

@@ -578,19 +578,25 @@
      exportGroupCodeExcel({
        codeClassifyOid: this.codeClassifyOid,
      }).then(res => {
        console.log(res)
        if (res) {
        let reader = new FileReader();
        reader.readAsText(res.data)
        reader.onload =  (result) =>{
          try {
            let resData = JSON.parse(result.target.result);  // 解析对象成功
            if (!resData.success) {
              console.log("resData",resData)
              this.$message.error(resData.msg);
              this.isLoading = false;
            }
          } catch (err) {
            // console.log("err",err)// 解析成对象失败，说明是正常的文件流
          func.downloadFileByBlobHandler(res);
          this.$message.success('下载成功，请查看！');
          this.isLoading = false;
        }
      }).catch(error => {
        console.log(error)
        if (error) {
          this.$message.error('请查看下载的错误文件！');
        }
        this.isLoading = false;
      })
        };

      });
    },
    //标准申请
    codeApplyHandler() {

 Source/UBCS-WEB/src/util/func.js

@@ -133,6 +133,7 @@
   * @returns {Boolean}
   */
  static downloadFileByBlobHandler(res) {
    if(res.headers['content-disposition']){
    const fileNames = res.headers['content-disposition'].split(";");
    let characterSet = fileNames[2].split("filename*=")[1];
    let fileName = decodeURI(fileNames[1].split("filename=")[1],characterSet);  // 下载的文件名
@@ -148,6 +149,7 @@
    document.body.removeChild(link); //删除下载
    window.URL.revokeObjectURL(url); //释放掉blob对象
  }
  }

  /**
   * 获取流文件进行文件下