java的问题

Question

你问的是请求分派？
看servlet例子import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class HTMLFormHandlerDispatcher1 extends HttpServlet {
public void service(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
RequestDispatcher rd = getServletContext().getRequestDispatcher
("/servlet/DispatcherForward");
rd.forward(req, res);
}
}
/////////////////////////////////////
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class DispatcherForward extends HttpServlet { 
public void service(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
res.setContentType("text/html");
PrintWriter out = res.getWriter();
out.println("Start of FORWARDED request");
out.println("Hi " + req.getParameter("firstname"));
out.println("I see you are a " + req.getParameter("title"));
out.println("End of request");
}
}