Java Servlet生成JSON格式数据并用jQuery显示的方法
本文实例讲述了JavaServlet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
importjava.io.IOException;
importjava.io.PrintWriter;
importjava.util.*;
importjavax.servlet.ServletException;
importjavax.servlet.annotation.WebServlet;
importjavax.servlet.http.HttpServlet;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
importjson.Person;
importnet.sf.json.JSONArray;
importnet.sf.json.JSONObject;
@WebServlet("/JSONServlet")
publicclassJSONServletextendsHttpServlet{
publicJSONServlet(){
super();
}
publicvoiddestroy(){
super.destroy();//Justputs"destroy"stringinlog
//Putyourcodehere
}
publicvoiddoGet(HttpServletRequestrequest,HttpServletResponseresponse)
throwsServletException,IOException{
response.setContentType("application/x-json");
response.setCharacterEncoding("GBK");
PrintWriterout=response.getWriter();
ArrayList<Person>items=newArrayList<Person>();
items.add(newPerson(2,"jack"));
items.add(newPerson(2,"bob"));
items.add(newPerson(2,"alex"));
JSONArrayjsonArray=newJSONArray();
jsonArray.addAll(items);
out.print(jsonArray.toString());
}
publicvoiddoPost(HttpServletRequestrequest,HttpServletResponseresponse)
throwsServletException,IOException{
doGet(request,response);
}
publicvoidinit()throwsServletException{
//Putyourcodehere
}
}
2、前端页面代码
<%@pagelanguage="java"contentType="text/html;charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDHTML4.01Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=ISO-8859-1">
<title>Inserttitlehere</title>
<scripttype="text/javascript"src="js/jquery-1.10.2.min.js"></script>
<scripttype="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){
vararr=eval(returnData);
$.each(arr,function(index,content){
$("#result").append(
"<div>"+content.legs
+"</div>"+"<div>"
+content.name
+"</div><hr/>");
});
}
});
});
});
</script>
</head>
<body>
<inputtype="button"id="kick"value="kick">
<divid="result"></div>
</body>
</html>
jQuery也可以用.getJSON实现异步数据获取
<scripttype="text/javascript">
$(document).ready(
function(){
$("#kick").click(function(){
$.getJSON("JSONServlet",function(returnData){
vararr=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。