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S3 Sample 간단 실습.

사전작업 : 기존 3주차 실습 에서 생성했던 accessKey, id 를 ~/.aws/credentials 에 입력하여 생성.

# Move this credentials file to (~/.aws/credentials)
# after you fill in your access and secret keys in the default profile
# WARNING: To avoid accidental leakage of your credentials,
#          DO NOT keep this file in your source directory.
[default]
aws_access_key_id = 
aws_secret_access_key = 


S3Sample.java
public class S3Sample {

    public static void main(String[] args) throws IOException {

        /*
         * The ProfileCredentialsProvider will return your [default]
         * credential profile by reading from the credentials file located at
         * (~/.aws/credentials).
         */
        AWSCredentials credentials = null;
        try {
            credentials = new ProfileCredentialsProvider().getCredentials();
        } catch (Exception e) {
            throw new AmazonClientException(
                    "Cannot load the credentials from the credential profiles file. " +
                    "Please make sure that your credentials file is at the correct " +
                    "location (~/.aws/credentials), and is in valid format.",
                    e);
        }

        AmazonS3 s3 = new AmazonS3Client(credentials);
        Region region = Region.getRegion(Regions.AP_NORTHEAST_2);
        s3.setRegion(region);

        String bucketName = "slipp-study-bucket-" + UUID.randomUUID();
        String key = "MyObjectKey";

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

        try {
            System.out.println("Creating bucket " + bucketName + "\n");
            s3.createBucket(bucketName);

            String bucketLocation = s3.getBucketLocation(new GetBucketLocationRequest(bucketName));
            System.out.println("bucket location = " + bucketLocation);
            /*
             * 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("Uploading a new object to S3 from a file\n");
            s3.putObject(new PutObjectRequest(bucketName, key, createSampleFile()));

            System.out.println("Downloading an object");
            S3Object object = s3.getObject(new GetObjectRequest(bucketName, key));
            System.out.println("Content-Type: "  + object.getObjectMetadata().getContentType());
            displayTextInputStream(object.getObjectContent());

            System.out.println("Listing objects");
            ObjectListing objectListing = s3.listObjects(new ListObjectsRequest()
                    .withBucketName(bucketName)
                    .withPrefix("My"));
            for (S3ObjectSummary objectSummary : objectListing.getObjectSummaries()) {
                System.out.println(" - " + objectSummary.getKey() + "  " +
                                   "(size = " + objectSummary.getSize() + ")");
            }
            System.out.println();

            System.out.println("Deleting an object\n");
            s3.deleteObject(bucketName, key);

            System.out.println("Deleting bucket " + bucketName + "\n");
            s3.deleteBucket(bucketName);
        } catch (AmazonServiceException ase) {
            System.out.println("Caught an AmazonServiceException, which means your request made it "
                    + "to Amazon S3, but was rejected with an error response 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, which means the client encountered "
                    + "a serious internal problem while trying to communicate with S3, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message: " + ace.getMessage());
        }
    }

    /**
     * Creates a temporary file with text data to demonstrate uploading a file
     * to Amazon S3
     *
     * @return A newly created temporary file with text data.
     *
     * @throws IOException
     */
    private static File createSampleFile() throws IOException {
        File file = File.createTempFile("aws-java-sdk-", ".txt");
        file.deleteOnExit();

        Writer writer = new OutputStreamWriter(new FileOutputStream(file));
        writer.write("abcdefghijklmnopqrstuvwxyz\n");
        writer.write("01234567890112345678901234\n");
        writer.write("!@#$%^&*()-=[]{};':',.<>/?\n");
        writer.write("01234567890112345678901234\n");
        writer.write("abcdefghijklmnopqrstuvwxyz\n");
        writer.close();

        return file;
    }

    /**
     * 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();
    }

}

build.gradle
apply plugin: 'java'

ext {
    javaVersion = '1.8'
}

repositories {
    mavenCentral()
}

sourceSets {
    main {
        java {
            srcDir 'src/main/java'
        }
    }
}

dependencies {
    compile 'com.amazonaws:aws-java-sdk-s3:1.11.98'
}

 

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