SpringBoot實現(xiàn)上傳文件到AWS S3的代碼

更新時間：2020年10月27日 09:14:47 作者：白42

這篇文章主要介紹了SpringBoot實現(xiàn)上傳文件到AWS S3的代碼，幫助大家更好的理解和使用springboot框架，感興趣的朋友可以了解下

簡單記錄一下在Springboot中上傳文件到AWS S3存儲服務的代碼。

在 application.xml中添加aws相關配置：

custom:
  aws:
    access-key: CHOBITACCESSKEY
    secret-key: CHOBIT/THISIS006SECRET007Key/dotORG
    bucket: zhyea
    endpoint: www.zhyea.com:80

新建一個 AwsS3Componment類來執(zhí)行上傳文件操作：

@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();
    }
}

因為使用的服務有設置endpoint，所以這里需要使用下面這一行完成endpoint的設置：

withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration(endpoint, Regions.CN_NORTH_1.getName()))

如果不設置endpoint就會收到下面這樣的報錯：

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)

異常信息中提示了AccessKey無效——雖然我的AccessKey是有效的。

在endpoint的這行配置中還設置了region信息。如果不需要設置endpoint，就得補上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();

下面是執(zhí)行上傳的代碼：

/**
 * 執(zhí)行文件上傳
 *
 * @param file 要上傳的文件的路徑
 * @param key  存儲文件的路徑
 * @return 文件路徑
 */
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();
}

這里是通過 File實例執(zhí)行的上傳。有時候會需要直接通過文件流執(zhí)行上傳，此時可以使用下面的代碼：

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();
}

注意這里的 setContentLength()最好配置一下。不設置會在處理的時候給出WARN。根據方法文檔也可以看到，如果不設置，在上傳的時候就會先在內存中緩存整個信息流來計算文件長度。

大體上就是這樣了。

End！

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