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我正在尝试通过 Blob 提供 zip 文件，存储在 GCS 中。但我收到此错误“严重：找不到 blob：BlobKey：encoded_gs_key:XYZ”

我还尝试了此链接中的给定代码，以确保我对对象具有正确的 ACL，并且我能够成功运行此代码：https ://developers.google.com/appengine/docs/java/googlecloudstorageclient/migrate

  java.io.PrintWriter out = resp.getWriter( );

    out.println("before");

    try{
                GcsFilename fileName = getFileName();
                BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
                out.println("after");
                BlobKey blobKey = blobstoreService.createGsBlobKey(
                    "/gs/"+ fileName.getBucketName() + "/" + fileName.getObjectName());
                out.println("before");
                out.println(blobKey);
                blobstoreService.serve(blobKey, resp);
    }
    catch(Exception e){

         out.println(e.getMessage());

    }
           resp.setContentType("application/zip");
           resp.getWriter().println("Hello, world Blob");


}

private GcsFilename getFileName() {

    String bucketname = "androidbucket";
    String filename = "test.zip";
    return new GcsFilename(bucketname, filename);
  }

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