package cn.itcast.servlet.request;

import java.io.BufferedReader;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Map;
import java.util.Set;

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

/**
?* Servlet implementation class RequestDemo6
?*/
@WebServlet("/requestDemo9")
public class RequestDemo9 extends HttpServlet {
?? ?private static final long serialVersionUID = 1L;
????? ?
??? /**
???? * @see HttpServlet#HttpServlet()
???? */
??? public RequestDemo9() {
??????? super();
??????? // TODO Auto-generated constructor stub
??? }

?? ?/**
?? ? * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
?? ? */
?? ?protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
?? ??? ?System.out.println("demo9被訪問了");
?? ??? ?//轉發(fā)到demo9資源
//?? ??? ?RequestDispatcher requestDispatcher = request.getRequestDispatcher("/requestDemo10");
//?? ??? ?requestDispatcher.forward(request, response);
?? ??? ?
?? ??? ?//在轉發(fā)之前存儲數據到request域中
?? ??? ?request.setAttribute("msg", "hello");
?? ??? ?
?? ??? ?
?? ??? ?request.getRequestDispatcher("/requestDemo10").forward(request, response);
?? ??? ?
?? ??? ?
?? ?}

?? ?/**
?? ? * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
?? ? */
?? ?protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
?? ??? ?this.doGet(request, response);
?? ?}

}

package cn.itcast.servlet.request;

import java.io.BufferedReader;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Map;
import java.util.Set;

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

/**
?* Servlet implementation class RequestDemo6
?*/
@WebServlet("/requestDemo10")
public class RequestDemo10 extends HttpServlet {
?? ?private static final long serialVersionUID = 1L;
????? ?
??? /**
???? * @see HttpServlet#HttpServlet()
???? */
??? public RequestDemo10() {
??????? super();
??????? // TODO Auto-generated constructor stub
??? }

?? ?/**
?? ? * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
?? ? */
?? ?protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
?? ??? ?//獲取數據
?? ??? ?Object msg = request.getAttribute("msg");
?? ??? ?System.out.println(msg);
?? ??? ?
?? ??? ?System.out.println("demo10被訪問了");
?? ??? ?
?? ?}

?? ?/**
?? ? * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
?? ? */
?? ?protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
?? ??? ?this.doGet(request, response);
?? ?}

}