SpringBoot实现上传文件到AWS S3的代码
简单记录一下在Springboot中上传文件到AWSS3存储服务的代码。
在application.xml中添加aws相关配置：
custom:
aws:
access-key:CHOBITACCESSKEY
secret-key:CHOBIT/THISIS006SECRET007Key/dotORG
bucket:zhyea
endpoint:www.zhyea.com:80
新建一个AwsS3Componment类来执行上传文件操作：
@Component
publicclassAwsS3ComponentimplementsInitializingBean{
@Value("${custom.aws.access-key}")
privateStringaccessKey;
@Value("${custom.aws.secret-key}")
privateStringaccessSecret;
@Value("${custom.aws.bucket}")
privateStringbucket;
@Value("${custom.aws.endpoint}")
privateStringendpoint;
privateAmazonS3client;
@Override
publicvoidafterPropertiesSet(){
ClientConfigurationconfig=newClientConfiguration();
config.setProtocol(Protocol.HTTP);
config.disableSocketProxy();
this.client=AmazonS3ClientBuilder
.standard()
.withClientConfiguration(config)
.withCredentials(newAWSStaticCredentialsProvider(newBasicAWSCredentials(accessKey,accessSecret)))
.withEndpointConfiguration(newAwsClientBuilder.EndpointConfiguration(endpoint,Regions.CN_NORTH_1.getName()))
.enablePathStyleAccess()
.build();
}
}
因为使用的服务有设置endpoint，所以这里需要使用下面这一行完成endpoint的设置：
withEndpointConfiguration(newAwsClientBuilder.EndpointConfiguration(endpoint,Regions.CN_NORTH_1.getName()))
如果不设置endpoint就会收到下面这样的报错：
com.amazonaws.services.s3.model.AmazonS3Exception:TheAWSAccessKeyIdyouprovideddoesnotexistinourrecords.(Service:AmazonS3;StatusCode:403;ErrorCode:InvalidAccessKeyId;RequestID:FRDT8N0RAQFNCVDP;S3ExtendedRequestID:DemEatwroXry2YN/5lyuMKDmhIi/aIz3QZPmLN0DYHeHU3oGUeOClJBcToz1J1qkcBZBfklRNs8=) atcom.amazonaws.http.AmazonHttpClient$RequestExecutor.handleErrorResponse(AmazonHttpClient.java:1660) atcom.amazonaws.http.AmazonHttpClient$RequestExecutor.executeOneRequest(AmazonHttpClient.java:1324) atcom.amazonaws.http.AmazonHttpClient$RequestExecutor.executeHelper(AmazonHttpClient.java:1074) atcom.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:745) atcom.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:719) atcom.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:701)
异常信息中提示了AccessKey无效——虽然我的AccessKey是有效的。
在endpoint的这行配置中还设置了region信息。如果不需要设置endpoint，就得补上region的配置：
this.client=AmazonS3ClientBuilder
.standard()
.withClientConfiguration(config)
.withCredentials(newAWSStaticCredentialsProvider(newBasicAWSCredentials(accessKey,accessSecret)))
.withRegion(Regions.CN_NORTH_1)//Region配置
.enablePathStyleAccess()
.build();
下面是执行上传的代码：
/**
*执行文件上传
*
*@paramfile要上传的文件的路径
*@paramkey 存储文件的路径
*@return文件路径
*/
privateStringupload(Filefile,Stringkey){
client.putObject(newPutObjectRequest(bucket,key,file).withCannedAcl(CannedAccessControlList.PublicRead));
GeneratePresignedUrlRequesturlRequest=newGeneratePresignedUrlRequest(bucket,key);
URLurl=client.generatePresignedUrl(urlRequest);
returnurl.toString();
}
这里是通过File实例执行的上传。有时候会需要直接通过文件流执行上传，此时可以使用下面的代码：
privateStringupload(InputStreaminput,Stringkey)throwsIOException{
DateexpireDate=newDate(System.currentTimeMillis()+TimeUnit.DAYS.toMillis(30));
ObjectMetadatametadata=newObjectMetadata();
metadata.setHttpExpiresDate(expireDate);
metadata.setContentLength(input.available());
client.putObject(newPutObjectRequest(bucket,key,input,metadata).withCannedAcl(CannedAccessControlList.PublicRead));
GeneratePresignedUrlRequesturlRequest=newGeneratePresignedUrlRequest(bucket,key);
URLurl=client.generatePresignedUrl(urlRequest);
returnurl.toString();
}
注意这里的setContentLength()最好配置一下。不设置会在处理的时候给出WARN。根据方法文档也可以看到，如果不设置，在上传的时候就会先在内存中缓存整个信息流来计算文件长度。
大体上就是这样了。
End！
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