使用适用于Java 2.x的AWS开发工具包检查S3对象的元数据 [英] Check metadata of S3 objects with AWS SDK for Java 2.x

问题描述

我找不到用使用适用于Java 1.x的AWS开发工具包，就这么简单:

With the AWS SDK for Java 1.x it was as easy as this:

s3Client.getObjectMetadata("myBucket"，"myfile.doc");

s3Client.getObjectMetadata("myBucket", "myfile.doc");

但是我看不到最新版本的API的类似方法.

But I cannot see the analogous method for the newest version of the API.

推荐答案

解决方案是使用HeadObjectRequest和HeadObjectResponse:

HeadObjectRequest headObjectRequest = HeadObjectRequest.builder()
  .bucket(bucketName)
  .key(key)
  .build();

然后:

HeadObjectResponse headObjectResponse = s3Client.headObject(headObjectRequest);

System.out.println("This is what I need: " + headObjectResponse.contentType());

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