如何将json字符串转换为javascript数组

Question

我收到一个json字符串，如下所示：

[{"id":1,"class_code":1,"first_name":"Barry","last_name":"Allen","grade":null,"behavior":1,"beh_comments":null,"random_seating":null,"ascending_seats":null,"descending_seats":null},{"id":2,"class_code":1,"first_name":"Bruce","last_name":"Banner","grade":null,"behavior":2,"beh_comments":null,"random_seating":null,"ascending_seats":null,"descending_seats":null}

我需要将其转换为javascript数组。这段代码：

var arr = Object.keys(jsonRoster).map(function (key) {return jsonRoster[key]});

给了我每个角色("b","a","r","r","y")，但我想访问整个“barry”。

Answer 1

您可以使用JSON.parse方法获取数组，然后根据需要访问名字或姓氏，如果这是您要执行的操作。

var j = '[{"id":1,"class_code":1,"first_name":"Barry","last_name":"Allen","grade":null,"behavior":1,"beh_comments":null,"random_seating":null,"ascending_seats":null,"descending_seats":null},{"id":2,"class_code":1,"first_name":"Bruce","last_name":"Banner","grade":null,"behavior":2,"beh_comments":null,"random_seating":null,"ascending_seats":null,"descending_seats":null}]';

var arr = JSON.parse(j)

然后你可以使用类似的东西：

 arr[0].first_name

如果您正在寻找，请告诉我。