Need help with implementing MVC using Spring

[surendra bollineni]

hi,
    implement using rest spring MVC download upload file .

[Tim Cooke]

Hello Surendra, welcome to the Ranch!

That's a very broad question for which an answer would be to do all the work for you, which isn't going to happen.

Can you show us what you've done so far? Is there something specific you're having trouble with right now?

[surendra bollineni]

hi,
 

@Controller
public class UploadDownloadController {
	
	private static final String UPLOAD_DIRECTORY ="D:/upload";
	
	@RequestMapping(value="/uploadform")  
	public ModelAndView uploadForm(){  
	       return new ModelAndView("uploadform");    
	}  
	     
	@RequestMapping(value="/savefile",method=RequestMethod.POST)  
	public ModelAndView saveimage( @RequestParam CommonsMultipartFile file,  
	           HttpSession session) throws Exception{  
	  
	    ServletContext context = session.getServletContext();  
	    String path = context.getRealPath(UPLOAD_DIRECTORY);  
	    String filename = file.getOriginalFilename(); 
	    System.out.println(filename);
	    System.out.println(path+" "+filename); 
	    try {
	    	  
	          FileOutputStream out = new FileOutputStream(new File(filename));
	          System.out.println(out);
	          FileInputStream input=new FileInputStream(filename);
	          int read = 0;
	          byte[] bytes = new byte[1024];

	          out = new FileOutputStream(new File(filename));
	          while ((read = input.read(bytes)) != -1) {
	               out.write(bytes, 0, read);
	         }
	          out.flush();
	          out.close();
	    } catch (IOException e) {
	    	e.printStackTrace();
	    }
	    String output = "File successfully uploaded to : " + filename;
	    System.out.println(output);

	    return new ModelAndView("uploadform","filesuccess","File successfully saved!");

	}
	@RequestMapping(value = "/hello", method = RequestMethod.GET)
	public String printWelcome(ModelMap model) {
		model.addAttribute("message", "Sample code!");
		return "download";
	}
	@RequestMapping(value = "/download", method = RequestMethod.GET)
	public @ResponseBody void downloadFiles(HttpServletRequest request,
				HttpServletResponse response) {
	 
		ServletContext context = request.getServletContext();
			
		File downloadFile = new File("D:/Users/bollinenis/Downloads/junit4jars.zip");
		FileInputStream inputStream = null;
		OutputStream outStream = null;
			
		try {
			inputStream = new FileInputStream(downloadFile);
	 
			response.setContentLength((int) downloadFile.length());
			response.setContentType(context.getMimeType("D:/Users/bollinenis/Downloads/junit4jars.zip"));			
	 
			// response header
			String headerKey = "Content-Disposition";
			String headerValue = String.format("attachment; filename=\"%s\"",downloadFile.getName());
			response.setHeader(headerKey, headerValue);
	 
			// Write response
			outStream = response.getOutputStream();
			IOUtils.copy(inputStream, outStream);
	 
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				if (null != inputStream)
					inputStream.close();
				if (null != inputStream)
					outStream.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
	 	}
	}
}

when run server it showing null doc it is my problem they could not stroe in location give solution

[Ankit Garg]

Try to follow this tutorial and see if it works...