javascript：ajax发送json

ajax发送json，没啥问题，就记录下来，给今后的自己做蓝版

$("#btn").bind("click", function() {
var img = $('#iid')[0].src;
var position = $("#_n2").val();
var questionId = $("#_n1").val();
var paraMap = {
"img": img,
"position": position,
"questionId": questionId
};
//上传banner
$.ajax({
type: "POST",
url: "http://xk-cms.test.xuguoliang.top/api/banner",
timeout: 3000,
headers: {
'Content-type': 'application/json;charset=UTF-8'
},
data: JSON.stringify(paraMap),

success: function(sres) {
console.log(sres);
},
fail: function(fres) {
console.log(fres);
}

});