获取角色列表

{
    "dat": [
        {
            "id": 1,
            "name": "Admin",
            "note": "Administrator role"
        },
        {
            "id": 2,
            "name": "Standard",
            "note": "Ordinary user role"
        },
        {
            "id": 3,
            "name": "Guest",
            "note": "Readonly user role"
        },
        {
            "id": 7,
            "name": "test2",
            "note": ""
        }
    ],
    "err": ""
}