Java Servlet生成JSON格式数据并用jQuery显示的方法

网络编程 2024/12/23 佚名

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本文实例讲述了Java Servlet生成JSON格式数据并用jQuery显示的方法。分享给大家供大家参考，具体如下：

1、Servlet通过json-lib生成JSON格式的数据

import java.io.IOException;
import java.io.PrintWriter;
import java.util.*;
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 json.Person;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
@WebServlet("/JSONServlet")
public class JSONServlet extends HttpServlet {
public JSONServlet() {
super();
}
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("application/x-json");
response.setCharacterEncoding("GBK");
PrintWriter out = response.getWriter();
ArrayList<Person> items=new ArrayList<Person>();
items.add(new Person(2,"jack"));
items.add(new Person(2,"bob"));
items.add(new Person(2,"alex"));
JSONArray jsonArray=new JSONArray();
jsonArray.addAll(items);
out.print(jsonArray.toString());
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request,response);
}
public void init() throws ServletException {
// Put your code here
}
}

2、前端页面代码

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
<script type="text/javascript" src="/UploadFiles/2021-04-02/jquery-1.10.2.min.js">

jQuery也可以用.getJSON实现异步数据获取


<script type="text/javascript">
$(document).ready(
function() {
$("#kick").click(function() {
$.getJSON("JSONServlet",function(returnData){
var arr = eval(returnData);
$("#result").html("");//清空info内容
$.each(arr, function(index, content) {
$("#result").append(
"<div>" + content.legs
+ "</div>" + "<div>"
+ content.name
+ "</div><hr/>");
});
});
});
});
</script>




希望本文所述对大家JSP程序设计有所帮助。

Java,Servlet,生成,JSON格式数据,jQuery显示,Servlet生成JSON

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