如何將圖像傳輸到Amazon S3

Question

我正在構建圖像服務器。有一個接受圖像的servlet，目的是將圖像存儲在Amazon S3中。

Part filePart = request.getPart("file"); 
InputStream inputStream = filePart.getInputStream(); 

如何流內容到Amazon S3，而無需下載文件到二級存儲？

亞馬遜S3 API是

System.out.println("Uploading a new object to S3 from a file\n"); 
    File file = new File(uploadFileName); 
    s3client.putObject(new PutObjectRequest(
         bucketName, keyName, file)); 

但是這需要一些文件路徑本地存儲。如何將圖像從servlet直接傳輸到S3而不將其存儲在磁盤上？

Answer 1

是的，還有另一個API是將inputStream直接放到S3中。

public PutObjectRequest(java.lang.String bucketName, 
      java.lang.String key, 
      java.io.InputStream input, 
      ObjectMetadata metadata) 

http://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/s3/model/PutObjectRequest.html#PutObjectRequest(java.lang.String,%20java.lang.String,%20java.io.InputStream,%20com.amazonaws.services.s3.model.ObjectMetadata)