make basic requests to Amazon S3 using the AWS SDK for Java - Java AWS

Java examples for AWS:S3

  1. HOME
  2. Java
  3. AWS
  4. S3

Description

make basic requests to Amazon S3 using the AWS SDK for Java

Demo Code

/*/*w ww .java 2  s.  c  o m*/
 * Copyright 2010-2012 Amazon.com, Inc. or its affiliates. All Rights
 Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file is
 distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 either
 * express or implied. See the License for the specific language
 governing
 * permissions and limitations under the License.
 */
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.PropertiesCredentials;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.Bucket;
import com.amazonaws.services.s3.model.GetObjectRequest;
import com.amazonaws.services.s3.model.S3Object;

/**
 * This sample demonstrates how to make basic requests to Amazon S3 using the
 * AWS SDK for Java.
 * <p>
 * <b>Prerequisites:</b> You must have a valid Amazon Web Services developer
 * account, and be signed up to use Amazon S3. For more information on Amazon
 * S3, see http://aws.amazon.com/s3.
 * <p>
 * <b>Important:</b> Be sure to fill in your AWS access credentials in the
 * AwsCredentials.properties file before you try to run this sample.
 * http://aws.amazon.com/security-credentials
 */
public class GetTestFile {

    public static void main(String[] args) throws IOException {
        /*
         * Important: Be sure to fill in your AWS access credentials in the
         * AwsCredentials.properties file before you try to run this sample.
         * http://aws.amazon.com/security-credentials
         */
        AmazonS3 s3 = new AmazonS3Client(new PropertiesCredentials(

        GetTestFile.class.getResourceAsStream("AwsCredentials.properties")));

        String bucketName = "dtccTest";

        String key = "largerfile.txt";

        System.out.println("------------------------------------------");
        System.out.println("Getting Started with Amazon S3");
        System.out.println("------------------------------------------\n");

        try {

            /*
             * List the buckets in your account
             */
            System.out.println("Listing buckets");
            for (Bucket bucket : s3.listBuckets()) {
                System.out.println(" - " + bucket.getName());
            }
            System.out.println();

            System.out.println("Downloading an object");
            S3Object object = s3.getObject(new GetObjectRequest(bucketName,
                    key));
            System.out.println("Content-Type: "
                    + object.getObjectMetadata().getContentType());
            System.out.println("ContentEncod: "
                    + object.getObjectMetadata().getContentEncoding());
            System.out.println("ContentLengt: "
                    + object.getObjectMetadata().getContentLength());
            System.out.println("ContentDisp: "
                    + object.getObjectMetadata().getContentDisposition());

            displayTextInputStream(object.getObjectContent());

        } catch (AmazonServiceException ase) {
            System.out
                    .println("Caught an AmazonServiceException, whichmeans your request made it "
                            + "to Amazon S3, but was rejected with an errorresponse for some reason.");
            System.out.println("Error Message:    " + ase.getMessage());
            System.out.println("HTTP Status Code: " + ase.getStatusCode());
            System.out.println("AWS Error Code:   " + ase.getErrorCode());
            System.out.println("Error Type:       " + ase.getErrorType());
            System.out.println("Request ID:       " + ase.getRequestId());
        } catch (AmazonClientException ace) {
            System.out
                    .println("Caught an AmazonClientException, whichmeans the client encountered "
                            + "a serious internal problem while trying tocommunicate with S3, "
                            + "such as not being able to access the network.");
            System.out.println("Error Message: " + ace.getMessage());
        }
    }

    /**
     * Displays the contents of the specified input stream as text.
     * 
     * @param input
     *            The input stream to display as text.
     * 
     * @throws IOException
     */
    private static void displayTextInputStream(InputStream input)
            throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                input));
        while (true) {
            String line = reader.readLine();
            if (line == null)
                break;

            System.out.println("    " + line);
        }
        System.out.println();
    }

}

Related Tutorials