如何将某个 S3 文件标记为公开

如何通过 Web 服务 API 将某个 S3 文件标记为公开。

使用方法setCannedAcl(CannedAccessControlList.PublicRead)更改访问控制权限。阅读 java 文档以获取详细信息here http://docs.amazonwebservices.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/s3/model/PutObjectRequest.html#setCannedAcl%28com.amazonaws.services.s3.model.CannedAccessControlList%29

示例代码：

BasicAWSCredentials basicAWSCredentials = new BasicAWSCredentials(ACCESS_KEY,SECRET_KEY);   
AmazonS3 s3 = new AmazonS3Client(basicAWSCredentials);

PutObjectRequest putObj = new PutObjectRequest(bucketName, objectKey, fileToUpload);

// making the object Public
putObj.setCannedAcl(CannedAccessControlList.PublicRead);

s3.putObject(putObj);