json对象:需要创建一个通用方法来检索值

{
    "CollegeResponse": {
        "departmentDetails": {
            "id": 42,
            "departmentName": "computer science",
            "labDetails": {
                "id": 21,
                "description": "machine learning",
                "assistant": {
                    "empid": 201101,
                    "isPermanent": false
                }
            },
            "affilated": false
        }
    }
}


responseInString = response.getEntity(String.class);
JSONObject json = new JSONObject(responseInString);
String id = json.getJSONObject("CollegeResponse").getJSONObject("departmentDetails").getString("id");
{
    "CollegeResponse": {
        "departmentD