<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP page</title>
<script>
function addText(){
//创建XMLHttpRequest 请求的对象
var request = new XMLHttpRequest();
// 请求的方式
var method = "GET";
// 请求的连接地址
var url = "AServlet";
// 初始化请求参数
request.open(method, url,true);
// 发送请求
request.send(null);
request.onreadystatechange = function(){
// 如果响应请求
if(request.readyState==4){
// 如果请求成功
if(request.status==200 || request.status==304){
var text = request.responseText;
alert(text);
var data = eval("("+text+")");
/* var data = JSON.parse(text); */
alert(data);
var span = document.getElementsByTagName("span")[0];
span.innerHTML = span.innerHTML+data.user.address.province;
}
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<servlet>
<servlet-name>AServlet</servlet-name>
<servlet-class>ajax.AServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>AServlet</servlet-name>
<url-pattern>/AServlet</url-pattern>
</servlet-mapping>
</web-app>
package ajax;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class AServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println("doGet...");
//设置编码
request.setCharacterEncoding("utf-8");
response.setCharacterEncoding("utf-8");
//设置返回文本的类型
response.setContentType("text/json");
String jsonString = "{\"user\":{\"name\":\"lf\",\"address\":{\"province\":\"广东\",\"city\":\"深圳\"}}}";
response.getWriter().print(jsonString);
}
}
}
};
}
</script>
</head>
<body>
<h1>解析xml</h1>
<span>省份：</span><br>
<a href="#" onclick="addText()">添加文本</a>
</body>
</html>
