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="js/jquery-1.10.2.min.js"></script>
<script type="text/javascript">
$(document).ready(
function() {
$("#kick").click(
function() {
$.ajax({
type : "post",//post方法
url : "jsonservlet",
data : {
"legs" : "2",
"name" : "aa"
},
//ajax成功的回调函数
success : function(returndata) {
var arr = eval(returndata);
$.each(arr, function(index, content) {
$("#result").append(
"<div>" + content.legs
+ "</div>" + "<div>"
+ content.name
+ "</div><hr/>");
});
}
});
});
});
</script>
</head>
<body>
<input type="button" id="kick" value="kick">
<div id="result"></div>
</body>
</html>
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。
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