Java_Language

Java Tutorial2D Graphics in JavaJava Stack-Walking APIClass - Java ReflectionCommon Java PitfallsDocumenting Java CodeGenerating Java CodeInstalling Java (Standard Edition)Java AgentsJava Alternative CollectionsJava AnnotationsJava Apache Commons LangJava AppDynamics and TIBCO BusinessWorks Instrumentation for Easy IntegrationJava AppletsJava ArraysJava AssertingJava Atomic TypesJava AudioJava AutoboxingJava Basic Control StructuresJava BenchmarksJava BigDecimalJava BigIntegerJava Bit ManipulationJava BufferedWriterJava ByteBufferJava Bytecode ModificationJava C++ ComparisonJava Calendar and its SubclassesJava Character encodingJava Choosing CollectionsJava Classes and ObjectsJava ClassloadersJava Collection Factory MethodsJava CollectionsJava Command line Argument ProcessingJava Comparable and ComparatorJava Compiler - javacJava CompletableFutureJava Concurrent CollectionsJava Concurrent Programming (Threads)Java Console I/OJava ConstructorsJava Converting to and from StringsJava Creating Images ProgrammaticallyJava Currency and MoneyJava Date ClassJava Dates and Time (java.time.*)Java Default MethodsJava deploymentJava Dequeue InterfaceJava Disassembling and DecompilingJava Dynamic Method DispatchJava Editions, Versions, Releases and DistributionsJava EncapsulationJava Enum MapJava Enum starting with numberJava EnumsJava EnumSet classJava Exceptions and exception handlingJava Executor, ExecutorService and Thread poolsJava ExpressionsJava File I/OJava FileUpload to AWSJava Floating Point OperationsJava Fluent InterfaceJava FTP (File Transfer Protocol)Java Functional InterfacesJava GenericsJava Getters and SettersJava HashtableJava HttpURLConnectionJava Immutable ClassJava Immutable ObjectsJava InheritanceJava InputStreams and OutputStreamsJava InterfacesJava Iterator and IterableJava JavaBeanJava JAX-WSJava JAXBJava JMXJava JNDIJava JShellJava Just in Time (JIT) compilerJava JVM FlagsJava JVM Tool InterfaceJava Lambda ExpressionsJava LinkedHashMapJava List vs SET



Java FileUpload to AWS

From WikiOD

Upload File to AWS s3 bucket using spring rest API.

Upload file to s3 bucket[edit | edit source]

Here we will create a rest APi which will take file object as a multipart parameter from front end and upload it to S3 bucket using java rest API.

Requirement :- secrete key and Access key for s3 bucket where you wanna upload your file.

code:* DocumentController.java

@RestController
@RequestMapping("/api/v2")
public class DocumentController {

    private static String bucketName = "pharmerz-chat";
    //   private static String keyName        = "Pharmerz"+ UUID.randomUUID();

    @RequestMapping(value = "/upload", method = RequestMethod.POST, consumes = MediaType.MULTIPART_FORM_DATA)
    public URL uploadFileHandler(@RequestParam("name") String name,
                                 @RequestParam("file") MultipartFile file) throws IOException {

/******* Printing all the possible parameter from @RequestParam *************/

        System.out.println("*****************************");

        System.out.println("file.getOriginalFilename() " + file.getOriginalFilename());
        System.out.println("file.getContentType()" + file.getContentType());
        System.out.println("file.getInputStream() " + file.getInputStream());
        System.out.println("file.toString() " + file.toString());
        System.out.println("file.getSize() " + file.getSize());
        System.out.println("name " + name);
        System.out.println("file.getBytes() " + file.getBytes());
        System.out.println("file.hashCode() " + file.hashCode());
        System.out.println("file.getClass() " + file.getClass());
        System.out.println("file.isEmpty() " + file.isEmpty());

        /*************Parameters to b pass to s3 bucket put Object **************/
        InputStream is = file.getInputStream();
        String keyName = file.getOriginalFilename();

// Credentials for Aws  
        AWSCredentials credentials = new BasicAWSCredentials("AKIA*************", "zr**********************");

        /****************** DocumentController.uploadfile(credentials); ***************************/

        AmazonS3 s3client = new AmazonS3Client(credentials);
        try {
            System.out.println("Uploading a new object to S3 from a file\n");
            //File file = new File(awsuploadfile);
            s3client.putObject(new PutObjectRequest(
                    bucketName, keyName, is, new ObjectMetadata()));

            URL url = s3client.generatePresignedUrl(bucketName, keyName, Date.from(Instant.now().plus(5, ChronoUnit.MINUTES)));
            // URL url=s3client.generatePresignedUrl(bucketName,keyName, Date.from(Instant.now().plus(5, ChronoUnit.)));
            System.out.println("************************************");
            System.out.println(url);

            return url;

        } 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 " +
                    "an internal error while trying to " +
                    "communicate with S3, " +
                    "such as not being able to access the network.");
            System.out.println("Error Message: " + ace.getMessage());
        }

        return null;

    }

}

Front end Function

var form = new FormData();
form.append("file", "image.jpeg");

var settings = {
 "async": true,
 "crossDomain": true,
 "url": "http://url/",
 "method": "POST",
 "headers": {
   "cache-control": "no-cache"
 },
 "processData": false,
 "contentType": false,
 "mimeType": "multipart/form-data",
 "data": form
}

$.ajax(settings).done(function (response) {
 console.log(response);
});

Credit:Stack_Overflow_Documentation