Ajax -- $.get() 方法解析 JSON 数据

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<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title><script type="text/javascript" src="script/jquery-1.7.2.js"></script><script type="text/javascript">function RandomString(length) {           var str = '';           for ( ; str.length < length; str += Math.random().toString(36).substr(2) );           return str.substr(0, length);     }     $(function(){           $("#btn02").click(function(){                //$.get(URL,data,success(response,status,xhr),dataType);                $.get("AjaxJqueryGetServlet",{userName:'Jerry',passWord:'Jerry12345',date:RandomString(32)},function(data,status,xhr){                     alert("后台返回数据: " + data.userName + ", " + data.passWord);                     alert("状态： " + status);                     alert("数据类型:" + xht);                },"json");           });     });</script></head><body>     <center>           <button id="btn01">$.post() 方法解析 JSON 数据</button><br/>           <button id="btn02">$.get() 方法解析 JSON 数据</button>     </center></body></html>

package com.atguigu.ajax.servlet;import java.io.IOException;import java.io.PrintWriter;import java.util.HashMap;import java.util.Map;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.google.gson.Gson;@WebServlet("/AjaxJqueryGetServlet")public class AjaxJqueryGetServlet extends HttpServlet {    private static final long serialVersionUID = 1L;    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {        Map<String,String> map = new HashMap<>();        String userName = request.getParameter("userName");        String passWord = request.getParameter("passWord");        map.put("userName", userName);        map.put("passWord", passWord);        Gson gson = new Gson();        String gsonMap = gson.toJson(map);        PrintWriter out = response.getWriter();        out.write(gsonMap);    }}

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