AWS S3 Java SDK - 下载文件帮助 [英] AWS S3 Java SDK - Download file help

问题描述

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.是否有更简单的方法来使用 AWS 开发工具包管理下载/类型?文档中包含的示例并不明显.谢谢！

The code below only works for downloading text files from a bucket in S3. This does not work for an image. Is there an easier way to manage downloads/types using the AWS SDK? The example included in the documentation does not make it apparent. Thanks!

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();

推荐答案

你应该使用 InputStream 和 Reader 和 Writer 类代替 Reader 和 Writer 类OutputStream 类:

Instead of Reader and Writer classes you should be using InputStream and OutputStream classes:

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();

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