Getting value using @Requestparam in servlet is alway the same.why

[rtskoo]

I use @RequestParam to get value in servlet,but the value I got is alway the same one while different values were post from client ,what is the problem?

import java.io.IOException;

import java.util.List;

import java.util.PropertyResourceBundle;

import javax.inject.Inject;

import javax.persistence.EntityManager;

import javax.persistence.PersistenceContext;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.jboss.solder.servlet.http.RequestParam;

import com.gxpost.efr.model.User;

/**

* Servlet implementation class Login

*/

@WebServlet("/Login.do")

public class Login extends HttpServlet {

    private static final long serialVersionUID = 1L;

    /**

     * @see HttpServlet#HttpServlet()

     */

    @Inject

    @RequestParam("login_name")

     String name1;

    public Login() {

        super();

        // TODO Auto-generated constructor stub

    }

    /**

     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse

     *      response)

     */

    protected void doGet(HttpServletRequest request,

            HttpServletResponse response) throws ServletException, IOException {

        // TODO Auto-generated method stub

    }

    /**

     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse

     *      response)

     */

    protected void doPost(HttpServletRequest request,

            HttpServletResponse response) throws ServletException, IOException {

          String name2=request.getParameter("login_name");

          System.out.println("name1: "+name1+"  name2: "+name2); // Name1 who gets the value of input 'login_name' in client has no change  for different input from client ,but name2 is OK

    }

}