为什么我收到错误 ClassNotFoundException: com.amazonaws.auth.AWSCredentialsProvider？

Question

我安装了AWS toolkitfor java 并将其连接到我在 buildpath 中的项目，我尝试将文件上传到S3.

File fileOfImages = new File("/sdcard/Save Image Tutorial");
AmazonS3 s3client = new AmazonS3Client(new ProfileCredentialsProvider());        
s3client.putObject(new PutObjectRequest("rosh-haayin-images", "images",fileOfImages)); 

但我收到以下错误：

ClassNotFoundException: com.amazonaws.auth.AWSCredentialsProvider

有人可以解释为什么会发生此异常吗？

Answer 1

这意味着您的项目构建路径中缺少 aws-java-sdk-1.10.X.jar。

$ jar tvf /home/xxx/aws-java-sdk/1.10.52/lib/aws-java-sdk-1.10.52.jar |grep AWSCredentialsProvider
  3485 Thu Feb 11 22:22:34 IST 2016 com/amazonaws/auth/AWSCredentialsProviderChain.class
   233 Thu Feb 11 22:22:34 IST 2016 com/amazonaws/auth/AWSCredentialsProvider.class
   806 Thu Feb 11 22:22:34 IST 2016 com/amazonaws/auth/DefaultAWSCredentialsProviderChain.class

验证您的项目是否引用（Java 构建路径）该 jar。