HTTP Status 405 - HTTP method POST is not supported by this URL

问题

I am getting the error HTTP Status 405 - HTTP method POST is not supported by this URL when I use the following code(below) ... the line causing the trouble (apparently) is getServletContext().getRequestDispatcher("/EditObject?id="+objId).forward(request, response);

package web.objects;

import java.io.IOException;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import dao.ObjDetailsDao;

@SuppressWarnings("serial")
public class EditObjectText extends HttpServlet {

 public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {


  int objId = Integer.parseInt(request.getParameter("objId"));
  String text = (String)request.getParameter("description");

  ObjDetailsDao oddao = new ObjDetailsDao();
   try {
oddao.modifyText(text, objId);
 /////////////
    getServletContext().getRequestDispatcher("/EditObject?id="+objId).forward(request, response);
 ////////////
   } catch (SQLException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   } catch (ServletException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
        }
      }
}

EDIT: I added the throws ServletException, IOException as suggested, but this did not change the error.

EDIT: the EditObject servlet looks like this

 @SuppressWarnings("serial")
public class EditObject extends HttpServlet{

    public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {

        int objId = Integer.parseInt(request.getParameter("id"));
        dispPage(objId, request, response);
    }

    private void dispPage(int objId, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{        

// ... lots of code in here
            getServletContext().getRequestDispatcher("/jsp/objectPageEdit.jsp").forward(request, response);

    }
}

ANOTHER EDIT: So basically I can't do what I am doing. What I need is this, the user submits a post request and then I refer him/her back to a servlet which uses the Get method instead of Post. How can I do this referral without getting the error? Thanks in advance.

回答1:

_{(sorry about the wrong answer I posted before, I deleted it).}

Apparently the URL /EditObject is mapped on another servlet which doesn't have doPost() method overriden. It would be called on RequestDispatcher#forward() as well because the method of currently running HTTP request is POST. The default HttpServlet#doPost() implementation will return HTTP 405. If your actual intent is to fire a GET request on it so that the doGet() method will be invoked, then you should rather use HttpServletResponse#sendRedirect() instead.

response.sendRedirect("/EditObject?id="+objId);

回答2:

Add a doPost() to your EditObject class:

 @SuppressWarnings("serial")
public class EditObject extends HttpServlet{

    public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
      process(request, response);
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
      process(request, response);
    }


    public void process(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {    
        int objId = Integer.parseInt(request.getParameter("id"));
        dispPage(objId, request, response);
    }

    private void dispPage(int objId, HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{        

// ... lots of code in here
            getServletContext().getRequestDispatcher("/jsp/objectPageEdit.jsp").forward(request, response);

    }
}

来源：https://stackoverflow.com/questions/3577414/http-status-405-http-method-post-is-not-supported-by-this-url

标签

java

servlets

http-status-code-405