更新：这是我愚蠢的复制/粘贴键错误。其他一些有趣的方面，我将尝试解释一下。。。
原始问题如下：
我试图编写一个spark程序，将json写入s3，但遇到了以下错误：我们计算的请求签名与您提供的签名不匹配。检查您的密钥和签名方法。
因此，我决定尝试以最简单的方式工作，使用awsjavasdk和这里描述的示例程序
在~/.aws/credentials中正确提供了我的凭证之后，上面引用的示例代码就可以正常工作，没有任何修改。
然后，我决定将~/.aws/凭证移到一边并重新运行，这样就搞错了。然后我尝试通过显式提供凭据来修复。您可以在“完全修改的程序”一节中看到稍微修改的示例程序的完整代码。
但我尝试的本质就在下面。请注意，我是通过

.withCredentials(provider)

在客户端生成器上。我还试着用下面的行运行，这两行都被注解掉并启用了：

//.withClientConfiguration(clientConfiguration)

.

public static void main(String[] args) throws IOException {
        String bucketName = "cbedford-sqlshackdemocli-test-only";
        String stringObjKeyName = "durango.saturday1";
        String fileObjKeyName = "clean.money.txt";
        String fileName = "/tmp/x";

        ClientConfiguration clientConfiguration = new ClientConfiguration();
        // Solution is update the Signer Version.
        clientConfiguration.setSignerOverride("S3SignerType");

        AWSCredentialsProvider provider = new  AWSCredentialsProvider() {
            @Override
            public AWSCredentials getCredentials() {
                return new AWSCredentials () {
                    @Override
                    public String getAWSAccessKeyId() {
                        // String below copied form ~/.aws/credentials 
                        // [default]
                        // aws_access_key_id = somethingsomething
                        return "somethingsomething";        
                    }
                    @Override
                    public String getAWSSecretKey() {
                        // String below copied form ~/.aws/credentials 
                        // [default]
                        // aws_secret_access_key = somethingsomethingelse
                        return "somethingsomethingelse";
                    }
                };
            }
            @Override
            public void refresh() {
            }
        };

        try {
            //This code expects that you have AWS credentials set up per:
            // https://docs.aws.amazon.com/sdk-for-java/v1/developer-guide/setup-credentials.html
            AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
                    .withRegion(Regions.US_EAST_1)
                    .withCredentials(provider)
                    //.withClientConfiguration(clientConfiguration)
                    .build();

无论我尝试了什么，通过inline方法提供与.aws目录中相同的凭据的所有尝试都失败了。如果有人能发现我愚蠢的错误（我知道我一定是在犯错误！）我将不胜感激。
完全修改程序

import com.amazonaws.AmazonServiceException;
import com.amazonaws.ClientConfiguration;
import com.amazonaws.SdkClientException;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.AWSCredentialsProvider;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.model.ObjectMetadata;
import com.amazonaws.services.s3.model.PutObjectRequest;

import java.io.File;
import java.io.IOException;

public class UploadObject {

    public static void main(String[] args) throws IOException {
        String bucketName = "cbedford-sqlshackdemocli-test-only";
        String stringObjKeyName = "durango.saturday1";
        String fileObjKeyName = "clean.money.txt";
        String fileName = "/tmp/x";

        ClientConfiguration clientConfiguration = new ClientConfiguration();
        // Solution is update the Signer Version.
        clientConfiguration.setSignerOverride("S3SignerType");

        AWSCredentialsProvider provider = new  AWSCredentialsProvider() {
            @Override
            public AWSCredentials getCredentials() {
                return new AWSCredentials () {
                    @Override
                    public String getAWSAccessKeyId() {
                        return "somethingsomething";        

                    }
                    @Override
                    public String getAWSSecretKey() {
                        return "somethingsomethingelse";        
                    }
                };
            }
            @Override
            public void refresh() {
            }
        };

        try {
            //This code expects that you have AWS credentials set up per:
            // https://docs.aws.amazon.com/sdk-for-java/v1/developer-guide/setup-credentials.html
            AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
                    .withRegion(Regions.US_EAST_1)
                    .withCredentials(provider)
                    //.withClientConfiguration(clientConfiguration)
                    .build();

            // Upload a text string as a new object.
            s3Client.putObject(bucketName, stringObjKeyName, "Uploaded String Object");

            // Upload a file as a new object with ContentType and title specified.
            PutObjectRequest request = new PutObjectRequest(bucketName, fileObjKeyName, new File(fileName));
            ObjectMetadata metadata = new ObjectMetadata();
            metadata.setContentType("plain/text");
            metadata.addUserMetadata("title", "someTitle");
            request.setMetadata(metadata);
            s3Client.putObject(request);
        } catch (AmazonServiceException e) {
            // The call was transmitted successfully, but Amazon S3 couldn't process
            // it, so it returned an error response.
            e.printStackTrace();
        } catch (SdkClientException e) {
            // Amazon S3 couldn't be contacted for a response, or the client
            // couldn't parse the response from Amazon S3.
            e.printStackTrace();
        }
    }
}