dispatcherservlet.java

自已写的Log4j的小例子

package mypack;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;

public class DispatcherServlet extends HttpServlet {

  private String target = "/hello.jsp";

  public void init(ServletConfig config)
    throws ServletException {
    super.init(config);
  }

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

    // If it is a get request forward to doPost()
    doPost(request, response);
  }

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

    // Get the username from the request
    String username = request.getParameter("username");
    // Get the password from the request
    String password = request.getParameter("password");

    // Add the  user to the request
    request.setAttribute("USER", username);
    request.setAttribute("PASSWORD", password);

    // Forward the request to the target named
    ServletContext context = getServletContext();

    System.out.println("Redirecting to " + target);
    RequestDispatcher dispatcher =
      context.getRequestDispatcher(target);
    dispatcher.forward(request, response);
  }

  public void destroy() {
  }
}