檔案下載的實現，這個點在做的時候呼叫到了技術中臺的介面

// 影像上傳下載介面調技術中臺的
export function getDownUrl(objectId){
    return requestExport({
      url:`/tc-storage-service/obj/storage/download?objectId=${objectId}`,
      method:'get'
    })
  }

js程式碼實現

// 下載影像上傳的檔案
    downLoad(id, name) {
      const fileName = name;
      if (id) {
        getDownUrl(id)
          .then((res) 
 
=> {
            const link = document.createElement("a");
            const blob = new Blob([res]);
            var reader = new FileReader();
            reader.readAsText(blob, "utf-8");
            reader.onload = () => {
              if (window.navigator && window.navigator.msSaveOrOpenBlob) {
                navigator.msSaveBlob(blob);
              } 
 
else {
                link.style.display = "none";
                link.href = URL.createObjectURL(blob);
                link.setAttribute("download", fileName);
                document.body.appendChild(link);
                link.click();
                document.body.removeChild(link);
              }
            };
          })
          .
 
catch((error) => {
            console.log(error);
          });
      } else {
        this.$message({
          type: "error",
          message: "請傳檔案路徑!",
        });
      }
    },