如何从用Java编写的AWS Lambda Function中读取S3文件？

使用Java S3 SDK。如果您将一个名为

x.db

mybucket

import com.amazonaws.services.s3.*;import com.amazonaws.services.s3.model.*;...AmazonS3 client = new AmazonS3Client();S3Object xFile = client.getObject("mybucket", "x.db");InputStream contents = xFile.getObjectContent();

此外，您应该确保已为lambda函数分配的角色可以访问S3存储桶。应用如下策略：

"Version": "2012-10-17","Statement": [{  "Effect": "Allow",  "Action": [    "s3:*"  ],  "Resource": [    "arn:aws:s3:::mybucket",    "arn:aws:s3:::mybucket/*"  ]}]