AWS S3 Java SDK-下载文件帮助

Question

以下代码仅适用于从S3中的存储桶下载文本文件。这不适用于图像。有使用AWS开发工具包管理下载/类型的简便方法吗？文档中包含的示例并不明显。谢谢！

AWSCredentials myCredentials = new BasicAWSCredentials(
       String.valueOf(Constants.act), String.valueOf(Constants.sk)); 
AmazonS3Client s3Client = new AmazonS3Client(myCredentials);        
S3Object object = s3Client.getObject(new GetObjectRequest("bucket", "file"));

BufferedReader reader = new BufferedReader(new InputStreamReader(
       object.getObjectContent()));
File file = new File("localFilename");      
Writer writer = new OutputStreamWriter(new FileOutputStream(file));

while (true) {          
     String line = reader.readLine();           
     if (line == null)
          break;

     writer.write(line + "\n");
}

writer.close();

Answer 1

而不是Reader和Writer类，你应该使用InputStream和OutputStream类：

InputStream reader = new BufferedInputStream(
   object.getObjectContent());
File file = new File("localFilename");      
OutputStream writer = new BufferedOutputStream(new FileOutputStream(file));

int read = -1;

while ( ( read = reader.read() ) != -1 ) {
    writer.write(read);
}

writer.flush();
writer.close();
reader.close();