2.16

Ajax入门
一、局部刷新案例

jsp:

1 <%@ page language="java" contentType="text/html; charset=UTF-8"
2 pageEncoding="UTF-8"%>
3
4
5
6
7
8
9
10
11
12
13
30
31
32 ${str}
33

34
35
36

servlet:

1 package servlet;
2
3 import java.io.IOException;
4 import javax.servlet.ServletException;
5 import javax.servlet.annotation.WebServlet;
6 import javax.servlet.http.HttpServlet;
7 import javax.servlet.http.HttpServletRequest;
8 import javax.servlet.http.HttpServletResponse;
9
10 /**
11 * Servlet implementation class test
12 /
13 @WebServlet("/test")
14 public class test extends HttpServlet {
15 private static final long serialVersionUID = 1L;
16
17 /*
18 * @see HttpServlet#HttpServlet()
19 /
20 public test() {
21 super();
22 // TODO Auto-generated constructor stub
23 }
24
25 /*
26 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
27 /
28 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
29 // TODO Auto-generated method stub
30 }
31
32 /*
33 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
34 */
35 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
36 // TODO Auto-generated method stub
37 request.setCharacterEncoding("UTF-8");
38 response.setCharacterEncoding("UTF-8");
39 response.setContentType("text/html");
40 String id=(String) request.getAttribute("id");
41 try {
42 Thread.sleep(3000);
43 } catch (InterruptedException e){
44 // TODO 自动生成的 catch 块
45 e.printStackTrace();
46 }
47 String str="HelloWorld!";
48 response.getWriter().write(str);
49 // request.setAttribute("str", str);
50 // request.getRequestDispatcher("test.jsp").forward(request,response);
51 }
52 }