jquery 的ajax应用

来源：互联网发布：caffe python用的是a 编辑：程序博客网时间：2024/04/29 14:53

html页面：

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'form_test.jsp' starting page</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript" src="jquery-1.7.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#sedd_ajax").click(function(){
var params = $("input").serialize();//序列化表单的值key=value形式
alert(params);
$.ajax(
{
url:"Ajaxservlet", //发送到后台处理的地址
type:'post', //提交方式
data:params, //传递的参数
dataType:'json', //接受数据格式
success:function(data){
},
error : function(XMLHttpRequest, textStatus, errorThrown) {
alert(XMLHttpRequest.status); //200
alert(XMLHttpRequest.readyState); //4
alert(textStatus);//解析文本状态
alert('读取超时，请检查网络连接');
}
}
);
});
//$.post提交方式
/* $("#test_post").click(function(){
$.post( //该方法接收参数,url 参数
'ajax_test.jsp',
{
username:$("#input1").val(),
userage:$("#input2").val(),
usersex:$("input3").val(),
userjob:$("input4").val()
},
function(data){ //这个是回调函数
var myjson;
eval('myjson='+data+';');
$("#result").html("姓名="+myjson.username+"<br/>工作"+myjson['userjob']);
}
);
}); */
});
</script>
</head>
<body>
<body topmargin="0" marginwidth="0" marginheight="0">
<div id="result" style="background:orange;border:1px solid red;width=300px;height=600px;"></div>
<form id="formtest" action="">
<p><span>姓名</span><input type="text" name="username" id="input1" value=""/></p>
<p><span>年龄</span><input type="text" name="userage" id="input2" value=""/></p>
<p><span>性别</span><input type="text" name="usersex" id="input3" value=""/></p>
<p><span>职业</span><input type="text" name="userjob" id="input4" value=""/></p>
</form>
<button id="sedd_ajax">提交</button>
<button id="test_post">post提交</button>
<button id="test_get">get提交</button>
</body>
</body>
</html>

Java页面：
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println(request.getParameter("username"));
response.setContentType("text/html");
PrintWriter out = response.getWriter();
ArrayList<User> list=new ArrayList<User>();
User user = new User();
user.setId(1);
user.setAge(20);
user.setName("wkl");
//转为json对象
list.add(user);
//将List转化为JSON
JSONArray json=JSONArray.fromObject(list);
System.out.println(json);
out.write(json.toString());
out.flush();
out.close();
}

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