1 $.ajax({
 2         type: ‘POST‘,
 3         url: ‘/login‘,
 4         dataType: ‘json‘,若出现跨域请求请使用‘jsonp‘
 5         data: {
 6             ‘userName‘: userName,
 7             ‘password‘: password
 8         },
 9         success: function (e) {
10             if (e.code == 200) {
11                 //这里登录成功后进行页面跳转
12                 window.location.href = ‘/index‘;
13                 alert(e.message);
14             } else {
15                 alert(e.message);
16             }
17         },
18         error: function () {
19             alert("Error!");
20         }
21     });

 1 $.ajax({
 2         method: ‘POST‘,这里不同了
 3         url: ‘/login‘,
 4         data: {
 5             ‘userName‘: userName,
 6             ‘password‘: password
 7         },
 8         success: function (e) {
 9             if (e.code == 200) {
10                 window.location.href = ‘/index‘;
11                 alert(e.message);
12             } else {
13                 alert(e.message);
14             }
15         },
16         error: function () {
17             alert("Error!");
18         }
19     });