Question

我有1个带有doPost方法的Servlet，它将上传图像。但是我需要先创建一个Pattern对象，这样我才能获得这个模式的ID，并使用它来使它成为图像的名称。（对这个问题不感兴趣，但现在你知道我的动机了）

这是我的名为CreatePatternServlet的Servlet，它使用了doGet：

 public void doGet(HttpServletRequest req, 
               HttpServletResponse resp)
              throws ServletException, java.io.IOException {
       /*--------------------creating the pattern-------------------------*/
       //TODO make pattern
       String name = req.getParameter("name");
       String scope = req.getParameter("scope");
       String purpose = req.getParameter("purpose");
       String problem = req.getParameter("problem");
       String solution = req.getParameter("solution");

       System.out.println("step 1: ["+name+","+ scope+","+purpose+","+problem+","+solution+"]");

       //This method returns the id of the pattern, which will be used for the name of the image
       int patternId = Controller.createPattern(name, scope, purpose, problem, solution);

       /*------------------end of creating pattern-----------------------*/

这将是UploadImageServlet中的doPost：

doPost(HttpServletRequest req, HttpServletRespose resp) throws ServletException, IOException{
      isMultipart = ServletFileUpload.isMultipartContent(req);

      java.io.PrintWriter out = resp.getWriter( );
      if( !isMultipart ){
         return;
      }

      DiskFileItemFactory factory = new DiskFileItemFactory();
      // maximum size that will be stored in memory
      factory.setSizeThreshold(maxMemSize);
      // Location to save data that is larger than maxMemSize.
      factory.setRepository(new File(repository));

      // Create a new file upload handler
      ServletFileUpload upload = new ServletFileUpload(factory);
      // maximum file size to be uploaded.
      upload.setSizeMax( maxFileSize );

      try{ 
      // Parse the request to get file items.
      List fileItems = upload.parseRequest(req);

      //calling the function which loads the image in the default directory
     Controller.uploadImage(fileItems, patternId);

      }catch(Exception e){
          System.out.println("oeps");
      }
      /*--------------------ending creation of image, image is created--------------------*/

   }

他们独立工作完全没问题，但我想将它们结合起来。 uploadImage无法与doGet一起运行，因此我需要一些方法将Get请求转发给Post请求。这可能吗？或者我应该找到解决方法吗？

Answer 1

开始阅读并理解这篇文章：How to upload files to server using JSP/Servlet?

一旦你这样做了，你应该能够用doPost中的适当调用替换你在doGet（）中所做的事情，以便一起修补它。

Java - Servlet转发Get方法到Post方法

1 个答案: