jquery - jquery ajax读取特定的json值

Question

我有一个 JSON 文件，我必须从 json 中读取全名

[{
        "id": 2,
        "username": "admin",
        "firstname": "Stella",
        "lastname": "Cristy",
        "fullname": "Stella Cristy",
        "email": "email0.s@gmail.com",
        "department": "",
        "firstaccess": 12121212,
        "lastaccess": 14101499879,
        "description": "",
        "descriptionformat": 1,
        "country": "IN",
        "profileimageurlsmall": "http:\/\/ddd\/lms\/dd.php\/5\/user\/icon\/f2",
        "profileimageurl": "http:\/\ddd\/lms\/pluginddddfile.php\/5\/user\/icon\/f1",
        "groups": [],
        "roles": [{
            "roleid": 5,
            "name": "",
            "shortname": "student",
            "sortorder": 0
        }],
        "preferences": [{
            "name": "assign_filter",
            "value": "notsubmitted"
        }],
        "enrolledcourses": [{
            "id": 14,
            "fullname": "DIGITAL LOGIC LABORATORY",
            "shortname": "CSEB111(P)"
        }, {
            "id": 4,
            "fullname": "COMPUTATIONAL MATHEMATICS -I",
            "shortname": "CSEB101 "
        }]
    }]

从上面的 json 我想获取全名，我尝试过但没有获取全名。

我的jquery代码是

 $.ajax({
                     url: "url",
                     dataType: "json",
                     type: "POST",
                     success: function(data) {
                 var json = $.parseJSON(data);
                 console.log(json.fullname);
                     }
            });

错误是TypeError: json is null 如何从上面的json中获取全名

Answer 1

这是一个数组，因此要获取第一个数组成员的全名，您必须执行以下操作:

json[0].fullname