使用jsonp实现ajax跨域访问
工作中的一个巧合，提到了ajax跨域访问的问题，刚刚心血来潮，弄了个简单的例子，为便于记忆，将前端和后端代码简单贴下：
前端:
<%@ page language="java" contentType="text/html; charset=UTF-8"%>
<html>
<head>
<title>ajax jsonp test</title>
<script src="jquery/jquery-1.3.2.min.js" type="text/javascript">
</script>
<script type="text/javascript">
$(document).ready(function(){
$("#button").click(function(){
$.ajax({
data:"?callback=?",
url: 'http://192.168.1.170/resp.jsp',
dataType:'jsonp',
success:function(json){
$("#show").html(json);
}
});
});
});
</script>
</head>
<body>
<form id="form1" name="form1" method="post">
<INPUT TYPE="button" value="提交" id="button"/>
</form>
<div id="show">
</div>
</body>
</html>后端:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String callback = request.getParameter("callback");
String resp = "\"helloworld!\"";
out.print(callback+"("+resp+")");
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