<%@ 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>