HTTP狀態405 - HTTP方法此URL不支持POST

Question

我收到錯誤HTTP Status 405 - HTTP method POST is not supported by this URL當我使用下面的代碼（下面）時HTTP Status 405 - HTTP method POST is not supported by this URL ...引起麻煩的行（顯然）是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();
        }
      }
}

編輯：我添加了throws ServletException, IOException建議，但這並沒有改變錯誤。

編輯：EditObject servlet看起來像這樣

 @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);

    }
}

另一個編輯：所以基本上我不能做我正在做的事情。 我需要的是，用戶提交一個帖子請求然后我將他/她引回到使用Get方法而不是Post的servlet。 如何在不收到錯誤的情況下進行此推薦？ 提前致謝。

Answer 1

_{（抱歉我之前發布的錯誤答案，我刪除了它） 。}

---

顯然，URL /EditObject映射到另一個沒有doPost()方法覆蓋的servlet上。 它也會在RequestDispatcher#forward()上調用，因為當前運行HTTP請求的方法是POST。 默認的 HttpServlet#doPost()實現將返回HTTP 405.如果您的實際意圖是在其上發出GET請求以便調用doGet()方法，那么您應該使用HttpServletResponse#sendRedirect()來代替。

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

Answer 2

將doPost（）添加到EditObject類：

 @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);

    }
}