SpringBoot实现上传文件到AWS S3的代码

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: 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)))

              fFXpth  .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.tofFXpthString();

}

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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