使用Javascript / JQUery解析JSON文件

I have this JSON file:

我有这个JSON文件:

{
"guest": {
    "permissions": {
        "webportal": [
            "access",
            "modify"
        ],
        {…}
        "test/dashboard": [
            "access"
        ]
    },
    "users": [
        "guest"
    ],
    "time_out": "3600000"
},
"administrator": {
    "permissions": {
        "webportal": [
            "monitoring",
            "access",
            "modify"
        ],
       {…}
        "test/settings": [
            "access",
            "modify"
        ]
    },
    "users": [
        "admin"
    ],
    "time_out": "3600000"
  }
}
{
"guest