Store Image to Google Cloud Store using Google App engine java

Here is sample code for uploading image files to cloud storage bucket in google cloud platform


Step 1 Create a google cloud project in cloud (https://console.cloud.google.com/)  enable cloud storage

Step 2: Create a new web application project
I am using Eclipse with Java for App engine Project

Step 3: create a POST web service method

the below code for upload image to the existing bucket in google cloud and the uploaded image url will be returned

Code

 @Path("/addres")

 @POST    
 @Consumes(MediaType.MULTIPART_FORM_DATA)  
 public String addRestaurant(
@FormDataParam("imgname") String imagename,           @FormDataParam("file") InputStream uploadedInputStream,        @FormDataParam("file") FormDataContentDisposition restImages    ) throws IOException  {
  try {
// Create your service object Storage storage = StorageOptions.getDefaultInstance().getService();
String bucketName = "abc-188706.appspot.com"; // Change this to something unique  // // Upload a Text blob to the  bucket
// BlobId blobId = BlobId.of(bucketName, "my_blob_name");
// BlobInfo blobInfo = BlobInfo.newBuilder(blobId).setContentType("text/plain").build();
// Blob blob = storage.create(blobInfo, "a simple blob".getBytes(UTF_8));
// Upload a Image blob to the  bucket
BlobId blobId = BlobId.of(bucketName, "IMG"+imagename); BlobInfo blobInfo = BlobInfo.newBuilder(blobId).setContentType("image/jpeg").build();     try (WriteChannel writer = storage.writer(blobInfo)) {               byte[] buffer = new byte[1024];             int limit;             while ((limit = uploadedInputStream.read(buffer)) >= 0) {               try {    
             writer.write(ByteBuffer.wrap(buffer, 0, limit));               } catch (Exception ex) {                 ex.printStackTrace();               }             }         }         System.out.println("DONE:");
        BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
    BlobKey blobKey = blobstoreService.createGsBlobKey("/gs/" + bucketName + "/" + blobId.toString());        
 System.out.println(" DONE: "+blobKey.getKeyString()+" bobo id="+blobKey.getKeyString());

 
    BlobstoreService blobStore = BlobstoreServiceFactory.getBlobstoreService();
BlobKey blobKey1 = blobStore.createGsBlobKey("/gs/" + bucketName + "/" + blobId.getName()); // blobKey can be persisted  
ImagesService imagesService = ImagesServiceFactory.getImagesService();  
String url = imagesService.getServingUrl(ServingUrlOptions.Builder.withBlobKey(blobKey1));        
System.out.println(" imageUrl:"+url);     return url;     }catch(Exception e) {
System.err.println("errr:"+e);
e.printStackTrace();
}
return null;
}

Please Note 

The application need to be deployed in google cloud platform.the above code will not work in local instance

Also add the necessary jar files