CODEWITHSUNDEEP
javajspservlets
Thế Hiệp
Thế Hiệp

Reputation: 43

Not using RequestDispatcher foward and Servlet Annotation

I want to access to Servlet class by any link with struct like this: http://localhost:8080/loginjsp/Reading/abc. "abc" can be change,it's up to you. So that I used Servlet Annotation

@WebServlet(urlPatterns = "/Reading/*").

But the trouble is I can't use RequestDispatcher foward. How can i do both of them?

Reading.Java

package com.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class ReadingTestServlet
 */
@WebServlet(
        urlPatterns = "/Reading/*",
        initParams =
        {
            @WebInitParam(name = "saveDir", value = "D:/FileUpload"),
            @WebInitParam(name = "allowedTypes", value = "jpg,jpeg,gif,png")
        }
)
public class ReadingTestServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;


    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        PrintWriter out = response.getWriter();
        RequestDispatcher rd=request.getRequestDispatcher("test.jsp");    
            rd.forward(request,response); 
    }
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // TODO Auto-generated method stub
        doGet(request, response);
    }

}

Upvotes: 1

Views: 473

Answers (1)

jsfviky
jsfviky

Reputation: 183

I've tried it and you are right, there is a problem. The problem is that you are into an infinite loop, because your dispatch makes the servlet be called again. The forward urlPattern will match urlPatterns = "/Reading/*" (you are using a wildcard). Replace the wildcard '*' with 'abc' in your urlPatterns and will work (I am assuming you put the 'test.jsp' in the /Reading directory)

Btw, consider using

getServletConfig().getServletContext().getRequestDispatcher("/absolute/path");

in similar situations.

Upvotes: 1

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