1，aws sdk jar版本不一致问题

一开始我在pom.xml中只配置了如下aws-java-sdk-s3

com.amazonaws

aws-java-sdk-s3

1.11.506

然后eclipse工程中如下截图，可以看到这3个jar版本不一致

然后我直接执行下面的代码put 字符串和上传文件

1 packagecom.hp.nova.common.tasksync.awss3;2

3 importjava.io.File;4 importjava.io.IOException;5

6 importcom.amazonaws.AmazonServiceException;7 importcom.amazonaws.SdkClientException;8 importcom.amazonaws.auth.AWSCredentials;9 importcom.amazonaws.auth.AWSStaticCredentialsProvider;10 importcom.amazonaws.auth.BasicAWSCredentials;11 importcom.amazonaws.auth.profile.ProfileCredentialsProvider;12 importcom.amazonaws.services.s3.AmazonS3;13 importcom.amazonaws.services.s3.AmazonS3ClientBuilder;14 importcom.amazonaws.services.s3.model.ObjectMetadata;15 importcom.amazonaws.services.s3.model.PutObjectRequest;16

17 public classUploadObject {18

19 public static void main(String[] args) throwsIOException {20 String clientRegion = "cn-northwest-1";21 String bucketName = "nova-test";22 String stringObjKeyName = "novatestkey";23 String fileObjKeyName = "test.txt";24 String fileName = "C:/nova_work_document/test.txt";25

26 try{27 AWSCredentials awsCredentials = new BasicAWSCredentials("Access key ID", "Secret access key");28 AmazonS3 s3Client =AmazonS3ClientBuilder.standard()29 .withRegion(clientRegion)30 .withCredentials(newAWSStaticCredentialsProvider(awsCredentials))31 .build();32

33 //Upload a text string as a new object.

34 s3Client.putObject(bucketName, stringObjKeyName, "Uploaded String Object");35

36 //Upload a file as a new object with ContentType and title specified.

37 PutObjectRequest request = new PutObjectRequest(bucketName, fileObjKeyName, newFile(fileName));38 ObjectMetadata metadata = newObjectMetadata();39 metadata.setContentType("plain/text");40 metadata.addUserMetadata("x-amz-meta-title", "someTitle");41 request.setMetadata(metadata);42 s3Client.putObject(request);43 }44 catch(AmazonServiceException e) {45 //The call was transmitted successfully, but Amazon S3 couldn't process46 //it, so it returned an error response.

47 e.printStackTrace();48 }49 catch(SdkClientException e) {50 //Amazon S3 couldn't be contacted for a response, or the client51 //couldn't parse the response from Amazon S3.

52 e.printStackTrace();53 }54 }55 }

就会报错如下

Exception in thread "main" java.lang.NoSuchFieldError: SIGNING_REGION

at com.amazonaws.services.s3.AmazonS3Client.createRequest(AmazonS3Client.java:4654)

at com.amazonaws.services.s3.AmazonS3Client.createRequest(AmazonS3Client.java:4630)

at com.amazonaws.services.s3.AmazonS3Client.putObject(AmazonS3Client.java:1706)

at com.amazonaws.services.s3.AmazonS3Client.putObject(AmazonS3Client.java:3819)

at com.hp.nova.common.tasksync.awss3.UploadObject111.main(UploadObject111.java:34)

解决方法：

在pom.xml中把如下都配置上

com.amazonaws

aws-java-sdk-s3

1.11.506

com.amazonaws

aws-java-sdk-kms

1.11.506

com.amazonaws

aws-java-sdk-core

1.11.506

com.amazonaws

jmespath-java

1.11.506

jar包的情况如下图

然后执行就可以成功了