ajax请求不到数据可能是传值类型的错误

$.ajax({
type: "post",
contentType: "application/json;charset=utf-8",
url: url + "/api/user/smscode",
data: JSON.stringify(data1),
success: function(data) {
var data = JSON.parse(data)
if(data.errno === 0) {
alert("发送成功");
var sum = 5
var int = setInterval(function() {
if(sum === 1) {
window.clearTimeout(int);
$("#yanzma").html("获取验证码");
} else {
sum--
$("#yanzma").html(sum);
}
}, 1000)

} else {

alert(data.msg)
}
// window.location.href = "/toMainPage";
},
error: function(XMLHttpResponse, textStatus, errorThrown) {
alert(XMLHttpResponse);
}
});