SpringBoot实现上传文件到AWS S3的代码
作者：白42
这篇文章主要介绍了SpringBoot实现上传文件到AWS S3的代码，帮助大家更好的理解和使用springboot框架，感兴趣的朋友可以了解下
简单记录一下在Springboot中上传文件到AWS S3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
public class AwsS3Component implements InitializingBean {
@Value("${custom.aws.access-key}")
private String accessKey;
@Value("${custom.aws.secret-key}")
private String accessSecret;
@Value("${custom.aws.bucket}")
private String bucket;
@Value("${custom.aws.endpoint}")
private String endpoint;
private AmazonS3 client;
@Override
public void afterPropertiesSet() {
ClientConfiguration config = new ClientConfiguration();
config.setProtocol(Protocol.HTTP);
config.disableSocketProxy();
this.client = AmazonS3ClientBuilder
.standard()
.withClientConfiguration(config)
.withCredentials(new AWSStaticCredentialsProvider(new BasicAWSCredentials(accessKey, accessSecret)))
.withEndpointConfiguration(new AwsClientBuilder.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(new AwsClientBuilder.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: The AWS Access Key Id you provided does not exist in our records. (Service: Amazon S3; Status Code: 403; Error Code: InvalidAccessKeyId; Request ID: FRDT8N0RAQFNCVDP; S3 Extended Request ID: DemEatwroXry2YN/5lyuMKDmhIi/aIz3QZPmLN0DYHeHU3oGUeOClJBcToz1J1qkcBZBfklRNs8=) at com.amazonaws.http.AmazonHttpClient$RequestExecutor.handleErrorResponse(AmazonHttpClient.java:1660) at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeOneRequest(AmazonHttpClient.java:1324) at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeHelper(AmazonHttpClient.java:1074) at com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:745) at com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:719) at com.amazonaws.http.AmazonHttpClient$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(new AWSStaticCredentialsProvider(new BasicAWSCredentials(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
*
* @param file 要上传的文件的路径
* @param key 存储文件的路径
* @return 文件路径
*/
private String upload(File file, String key) {
client.putObject(new PutObjectRequest(bucket, key, file).withCannedAcl(CannedAccessControlList.PublicRead));
GeneratePresignedUrlRequest urlRequest = new GeneratePresignedUrlRequest(bucket, key);
URL url = client.generatePresignedUrl(urlRequest);
return url.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：
private String upload(InputStream input, String key) throws IOException {
Date expireDate = new Date(System.currentTimeMillis() + TimeUnit.DAYS.toMillis(30));
ObjectMetadata metadata = new ObjectMetadata();
metadata.setHttpExpiresDate(expireDate);
metadata.setContentLength(input.available());
client.putObject(new PutObjectRequest(bucket, key, input, metadata).withCannedAcl(CannedAccessControlList.PublicRead));
GeneratePresignedUrlRequest urlRequest = new GeneratePresignedUrlRequest(bucket, key);
URL url = client.generatePresignedUrl(urlRequest);
return url.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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