无法通过 Tomcat 服务器连接到 Amazon S3答案

【问题标题】：Not able to connect to Amazon S3 via Tomcat server无法通过 Tomcat 服务器连接到 Amazon S3
【发布时间】：2018-08-16 21:16:50
【问题描述】：

我编写了一个代码来列出亚马逊 s3 存储桶中的文件，但它给了我这个例外：

com.amazonaws.SdkClientException: Unable to execute HTTP request: Connect to 11.36.134.067:8080 [/11.36.134.067] failed: Connection refused: connect
    com.amazonaws.http.AmazonHttpClient$RequestExecutor.handleRetryableException(AmazonHttpClient.java:1114)
    com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeHelper(AmazonHttpClient.java:1064)
    com.amazonaws.http.AmazonHttpClient$RequestExecutor.doExecute(AmazonHttpClient.java:743)
    com.amazonaws.http.AmazonHttpClient$RequestExecutor.executeWithTimer(AmazonHttpClient.java:717)
    com.amazonaws.http.AmazonHttpClient$RequestExecutor.execute(AmazonHttpClient.java:699)
    com.amazonaws.http.AmazonHttpClient$RequestExecutor.access$500(AmazonHttpClient.java:667)
    com.amazonaws.http.AmazonHttpClient$RequestExecutionBuilderImpl.execute(AmazonHttpClient.java:649)
    com.amazonaws.http.AmazonHttpClient.execute(AmazonHttpClient.java:513)
    com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4330)
    com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4277)
    com.amazonaws.services.s3.AmazonS3Client.invoke(AmazonS3Client.java:4271)
    com.amazonaws.services.s3.AmazonS3Client.listObjects(AmazonS3Client.java:835)
    com.focus.re.calibr.service.FileUploadService.list(FileUploadService.java:114)
    com.focus.re.calibr.controller.FileUploadController.list(FileUploadController.java:33)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    java.lang.reflect.Method.invoke(Method.java:498)

使用 main 方法列出文件的代码：

public class App {

    String bucketName = "buketname";
    String accesskey = "accesskey";

    public static void main(String args[]) throws Exception {
        new App();

    }


    App() throws Exception {

        BasicAWSCredentials basicAWSCredentials = new BasicAWSCredentials(accesskey,
                "secretekey");

        AWSCredentialsProvider awsCredentialsProvider = new AWSStaticCredentialsProvider(basicAWSCredentials);

        AwsClientBuilder.EndpointConfiguration endpointConfiguration =
                new AwsClientBuilder.EndpointConfiguration("11.36.134.067:8080", "");

        ClientConfiguration clientCfg = new ClientConfiguration();
        SSLContextBuilder builder = new SSLContextBuilder();

        builder.loadTrustMaterial(null, new

                TrustStrategy() {
                    public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                        return true;
                    }
                });

        SSLConnectionSocketFactory sslConnectionSocketFactory =
                new SSLConnectionSocketFactory(builder.build(), new NoopHostnameVerifier());
        clientCfg.getApacheHttpClientConfig().

                withSslSocketFactory(sslConnectionSocketFactory);

        AmazonS3 amazonS3 = AmazonS3ClientBuilder.standard()
                .withCredentials(awsCredentialsProvider)
                .withClientConfiguration(clientCfg)
                .withEndpointConfiguration(endpointConfiguration)
                .build();

        listAllFiles(amazonS3);


    } 

public void listAllFiles(AmazonS3 amazonS3) {

        ListObjectsRequest listObjectsRequest = new ListObjectsRequest().withBucketName(bucketName);

        ObjectListing objectListing = amazonS3. listObjects (listObjectsRequest);

        objectListing.getObjectSummaries().forEach(
                s3ObjectSummary -> {
                    System.out.println(s3ObjectSummary.getKey() + "  " + s3ObjectSummary.getSize());

                });
    }

}

如果我通过执行 main 方法运行代码，此代码将正常工作，但如果我通过调用 Spring RESTful Web 服务从 tomcat 服务器运行代码，则会发生异常。

目前我使用的是最新的 Tomcat 服务器 8.5.28，有什么办法可以解决这个问题吗？

【问题讨论】：

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标题已更改..
我认为 EndpointConfiguration 适用于 AWS 服务端点，并且我认为 IP 地址“11.36.134.067”不是 AWS IP 地址之一。将 EndpointConfiguration 设置为正确的 AWS 服务端点，例如 s3.amazonaws.com，我认为它将连接到 s3 服务。

标签： java amazon-s3 aws-java-sdk

【解决方案1】：

EndpointConfiguration 用于 Amazon 的 端点，而不是您的。来自documentation:

每个 AWS 客户端都可以配置为使用区域通过调用 setEndpoint 方法。

例如，将 Amazon EC2 客户端配置为使用欧盟（爱尔兰）地区，使用以下代码。
AmazonEC2 ec2 = new AmazonEC2(myCredentials);
ec2.setEndpoint("https://ec2.eu-west-1.amazonaws.com");

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