jsonp _____跨域请求实现

请求如下：

$.ajax({
type: "GET",
async:false,
url: "http://127.0.0.1:8080/Cross-site-request/crosssite",
dataType: "jsonp",
data: {"value":"123"},
jsonpCallback:"callback",

success: function(data) {
console.log(data);
},
error: function(XMLHttpRequest, textStatus, errorThrown){
alert(XMLHttpRequest.status);
alert(XMLHttpRequest.readyState);
alert(textStatus);
}

});
}

返回字符串构造如下

callback([{"name":"Alibaba","company":"MY"},{"name":"Tencent","company":"MHT"},{"name":"baidu","company":"LYH"},{"name":"JD","company":"LQD"}])

注意（敲黑板）

jsonpCallback:"callback",   和 返回的callback()   对应