jQuery+json实现的简易Ajax调用实例_jquery

Userservlet.java代码：

package com.iss.servlet;
import org.json.JSONException;
import org.json.JSONObject;
import com.iss.pojo.User;
import com.iss.util.JSONUtil;
public class UserServlet extends HttpServlet {
 public void doGet(HttpServletRequest request, HttpServletResponse response)
 throws ServletException, IOException {
 doPost(request, response);
 }
 public void doPost(HttpServletRequest request, HttpServletResponse response)
 throws ServletException, IOException {
 response.setContentType("text/html;charset=utf-8");
 //list 添加对象
 List userList = new ArrayList();
 User user1 = new User("张三", "男", "18");
 User user2 = new User("李四", "男", "19");
 User user3 = new User("王五", "男", "20");
 userList.add(user1);
 userList.add(user2);
 userList.add(user3);
 PrintWriter out = response.getWriter();
 String str = null;
 try {
 //帐号密码如果匹配则把list 返回给界面
 if (request.getParameter("userName").equals("jquery")
 && request.getParameter("password").equals("ajax")) {
 str = JSONObject.quote(JSONUtil.toJSONString(userList));
 }
 out.print(str);
 } catch (JSONException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 System.out.println("str "+str);
 out.flush();
 out.close();
 }
}

Html代码：