演示JSON(jquery和servlet)演示1：演示2：演示3演示4：

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我是靠谱客的博主端庄万宝路，最近开发中收集的这篇文章主要介绍演示JSON(jquery和servlet)演示1：演示2：演示3演示4：，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

演示1：

servlet代码

@WebServlet(urlPatterns = "/getJSON")
public class JSONServlet extends HttpServlet {

   @Override
   protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
       resp.getWriter().print("{"abc":"123"}"); //默认字符串
   }
}

HTML代码

<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="js/jquery.min.js"></script>
</head>
<body>
<zsls id='dis'></zsls>
<script type="text/javascript">
function getJSON() {
   $.ajax({
       url:"getJSON",
       success:function(res){
           $("#dis").html(res);
           alert(typeof res); //字符串
       }
   });
}
getJSON();
</script>
</body></html>

运行效果

演示2：

Servlet代码

package com.cxy.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(urlPatterns = "/getJSON")
public class JSONServlet extends HttpServlet {

   @Override
   protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
       resp.setContentType("application/json;charset=utf-8");   //指定以json格式返回
       resp.getWriter().print("{"abc":"123"}");
   }
}

HTML代码

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="js/jquery.min.js"></script>
</head>
<body>
<zsls id='dis'></zsls>
<script type="text/javascript">
function getJSON() {
   $.ajax({
       url:"getJSON",
       success:function(res){
           $("#dis").html(res);
           alert(typeof res);     //json对象
           $("#dis").html(res.abc);
       }
   });
}
getJSON();
</script>
</body></html>

运行效果

演示3

servlet代码

package com.cxy.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(urlPatterns = "/getJSON")
public class JSONServlet extends HttpServlet {

   @Override
   protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
           resp.getWriter().print("{"abc":"123"}"); //默认返回普通文本
   }
}

html代码

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="js/jquery.min.js"></script>
</head>
<body>
<zsls id='dis'></zsls>
<script type="text/javascript">
function getJSON() {
   $.ajax({
       url:"getJSON",
       dataType:"json", //指定返回类型为json
       success:function(res){
           $("#dis").html(res);
           alert(typeof res);
           $("#dis").html(res.abc);
       }
   });
}
getJSON();
</script>
</body></html>

运行效果

演示4：

servlet代码

HTML代码

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="js/jquery.min.js"></script>
</head>
<body>
<zsls id='dis'></zsls>
<script type="text/javascript">
function getJSON() {
   $.ajax({
       url:"getJSON",
       success:function(res){
           $("#dis").html(res);
           alert(typeof res);
           $("#dis").html(res.abc);
           res=eval("("+res+")");   //转换为对象
           alert(typeof res);
           $("#dis").html(res.abc);
       }
   });
}
getJSON();
</script>
</body></html>