file downloading in restful web services

Question

My requirement is, I should send a 10MB zip file to the client with a restful service. I found the code in forums that sending a StreamingOutput object is the better way, but how can I create a StreamingOutput object in the following code:

@Path("PDF-file.pdf/") @GET @Produces({"application/pdf"}) public StreamingOutput getPDF() throws Exception {   return new StreamingOutput() {      public void write(OutputStream output) throws IOException, WebApplicationException            {         try {             //------         } catch (Exception e) {             throw new WebApplicationException(e);         }      }   }; } 

Answer 1

Its the better way and easy way for file dowload.

private static final String FILE_PATH = "d:\\Test2.zip"; @GET @Path("/get") @Produces(MediaType.APPLICATION_OCTET_STREAM) public Response getFile() {     File file = new File(FILE_PATH);     ResponseBuilder response = Response.ok((Object) file);     response.header("Content-Disposition", "attachment; filename=newfile.zip");     return response.build();  } 

For your code as you asked:

@GET @Path("/helloWorldZip")  @Produces(MediaType.APPLICATION_OCTET_STREAM) public StreamingOutput helloWorldZip() throws Exception {     return new StreamingOutput(){     @Override         public void write(OutputStream arg0) throws IOException, WebApplicationException {             // TODO Auto-generated method stub             BufferedOutputStream bus = new BufferedOutputStream(arg0);             try {                 //ByteArrayInputStream reader = (ByteArrayInputStream) Thread.currentThread().getContextClassLoader().getResourceAsStream();                      //byte[] input = new byte[2048];                   java.net.URL uri = Thread.currentThread().getContextClassLoader().getResource("");                 File file = new File("D:\\Test1.zip");                 FileInputStream fizip = new FileInputStream(file);                 byte[] buffer2 = IOUtils.toByteArray(fizip);                 bus.write(buffer2);             } catch (Exception e) {             // TODO Auto-generated catch block             e.printStackTrace();             }         }     }; }