这是上传文件代码的相关java代码,我需要为文件名添加时间戳,然后将其上传到特定目录

 public class Upload extends HttpServlet {

   private static final long serialVersionUID = 1L;
   public void init() throws ServletException {

     System.out.println(this.getClass().getName());
   }

   protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException {
     //boolean MultipartRequest;
     //String PrintWriter;

     response.setContentType("text/html");

     PrintWriter out = response.getWriter();
     MultipartRequest multipartRequest = new MultipartRequest(request,"/home/hadoop/Desktop");

     out.println("succcesfully uploaded");

   }
   public void destroy() {
     System.out.println(this.getClass().getName());
   }

 }