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jsonp 跨域访问

2017-04-25 15:51 232 查看

JQuery+ajax+jsonp 跨域访问

json-lib-2.4-jdk15.jar

maven

---------------------pom.xml

<json-lib.version>2.4</json-lib.version>

<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>${json-lib.version}</version>

</dependency>

------------指定jdk否则会报错------

<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>${json-lib.version}</version>
<classifier>jdk15</classifier>

</dependency>

------------------html---------------

<!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=UTF-8">

<title>Insert title here</title>

<script type="text/javascript" src="resource/js/jquery-1.7.2.js"></script>

</head>

<script type="text/javascript">

$(function(){

/*

//简写形式，效果相同

$.getJSON("http://app.example.com/base/json.do?sid=1494&busiId=101&jsonpCallback=?",

function(data){

$("#showcontent").text("Result:"+data.result)

});

*/

$.ajax({

type : "get",

async:false,

url : "http://app.example.com/base/json.do?sid=1494&busiId=101",

dataType : "jsonp",//数据类型为jsonp

jsonp: "jsonpCallback",//服务端用于接收callback调用的function名的参数

success : function(data){

$("#showcontent").text("Result:"+data.result)

},

error:function(){

alert('fail');

}

});

});

</script>

<body>

<div id="showcontent">Result:</div>

</body>

</html>

------------------------------controller 类----------------------

@RequestMapping("/json")
public void exchangeJson(HttpServletRequest request,HttpServletResponse response) {

//sid=1494&busiId=101",
try {
response.setContentType("text/plain");
response.setHeader("Pragma", "No-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0);
Map<String,String> map = new HashMap<String,String>();
map.put("result", "content");
map.put("c_time", String.valueOf(System.currentTimeMillis()));
PrintWriter out = response.getWriter();
JSONObject resultJSON = JSONObject.fromObject(map); //根据需要拼装json
String jsonpCallback = request.getParameter("jsonpCallback");//客户端请求参数
out.println(jsonpCallback+"("+resultJSON.toString(1,1)+")");//返回jsonp格式数据
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}

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标签： js jsonp

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