java操作AWS S3一些坑记录

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

<!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-s3 -->
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-s3</artifactId>
<version>1.11.506</version>
</dependency>

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

 package com.hp.nova.common.tasksync.awss3;

 import java.io.File;
 import java.io.IOException;

 import com.amazonaws.AmazonServiceException;
 import com.amazonaws.SdkClientException;
 import com.amazonaws.auth.AWSCredentials;
 import com.amazonaws.auth.AWSStaticCredentialsProvider;
 import com.amazonaws.auth.BasicAWSCredentials;
 import com.amazonaws.auth.profile.ProfileCredentialsProvider;
 import com.amazonaws.services.s3.AmazonS3;
 import com.amazonaws.services.s3.AmazonS3ClientBuilder;
 import com.amazonaws.services.s3.model.ObjectMetadata;
 import com.amazonaws.services.s3.model.PutObjectRequest;

 public class UploadObject {

     public static void main(String[] args) throws IOException {
         String clientRegion = "cn-northwest-1";
         String bucketName = "nova-test";
         String stringObjKeyName = "novatestkey";
         String fileObjKeyName = "test.txt";
         String fileName = "C:/nova_work_document/test.txt";

         try {
             AWSCredentials awsCredentials = new BasicAWSCredentials("Access key ID", "Secret access key");
             AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
                     .withRegion(clientRegion)
                     .withCredentials(new AWSStaticCredentialsProvider(awsCredentials))
                     .build();

             // Upload a text string as a new object.
             s3Client.putObject(bucketName, stringObjKeyName, "Uploaded String Object");

             // Upload a file as a new object with ContentType and title specified.
             PutObjectRequest request = new PutObjectRequest(bucketName, fileObjKeyName, new File(fileName));
             ObjectMetadata metadata = new ObjectMetadata();
             metadata.setContentType("plain/text");
             metadata.addUserMetadata("x-amz-meta-title", "someTitle");
             request.setMetadata(metadata);
             s3Client.putObject(request);
         }
         catch(AmazonServiceException e) {
             // The call was transmitted successfully, but Amazon S3 couldn't process
             // it, so it returned an error response.
             e.printStackTrace();
         }
         catch(SdkClientException e) {
             // Amazon S3 couldn't be contacted for a response, or the client
             // couldn't parse the response from Amazon S3.
             e.printStackTrace();
         }
     }
 }

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

<!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-s3 -->
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-s3</artifactId>
<version>1.11.506</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-kms -->
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-kms</artifactId>
<version>1.11.506</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk-core -->
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>aws-java-sdk-core</artifactId>
<version>1.11.506</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.amazonaws/jmespath-java -->
<dependency>
<groupId>com.amazonaws</groupId>
<artifactId>jmespath-java</artifactId>
<version>1.11.506</version>
</dependency>

jar包的情况如下图

然后执行就可以成功了