IllegalAccessException while parsing JSON using JSONObject-CodePudding

Hello I have a json response as part of a request i need to access the value of one of the attribute. For example, my response looks like:

{
    "data": {
        "Members": [
            {
                "id": "01",
                "name": "new york"
                
            },
            {
                "id": "02",
                "name": "chicago"                
            }
            ,
            {
                "id": "03",
                "name": "la"                
            }
        ]
    }
}

I need to extract the values "new york" , "chicago", "la". How can i do it; i tried to convert to JSON object but unable to access even "data".:

    JSONObject jsonObj = new JSONObject(response.getBody());

    JSONArray ja_data = jsonObj.getJSONArray("data");

The above code is one among various googled answers and this one results in IllegalAccessException. The complete exception:

Exception in thread "main" java.lang.RuntimeException: java.lang.IllegalAccessException: class org.json.JSONObject cannot access a member of class java.lang.String (in module java.base) with modifiers "private"
    at org.json.JSONObject.populateInternalMap(JSONObject.java:349)
    at org.json.JSONObject.<init>(JSONObject.java:278)
    at GetName.getName(GetName.java:64)
    at GetName.main(GetName.java:30)
Caused by: java.lang.IllegalAccessException: class org.json.JSONObject cannot access a member of class java.lang.String (in module java.base) with modifiers "private"
    at java.base/jdk.internal.reflect.Reflection.newIllegalAccessException(Reflection.java:361)
    at java.base/java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:591)
    at java.base/java.lang.reflect.Method.invoke(Method.java:558)
    at org.json.JSONObject.populateInternalMap(JSONObject.java:328)

Is there a way i can handle this. Thanks

CodePudding user response：

I think your issue is not related to the parsing of the JSON as I tested it as below :

// Escaped JSON String, same as presented in question
JSONObject jsonObj = new JSONObject("{\r\n    \"data\": {\r\n        \"Members\": [\r\n            {\r\n                \"id\": \"01\",\r\n                \"name\": \"new york\"\r\n                \r\n            },\r\n            {\r\n                \"id\": \"02\",\r\n                \"name\": \"chicago\"                \r\n            }\r\n            ,\r\n            {\r\n                \"id\": \"03\",\r\n                \"name\": \"la\"                \r\n            }\r\n        ]\r\n    }\r\n}");

// Parsed "data" as Object 
JSONObject data = jsonObj.getJSONObject("data");

// Parsed "Members" as an array
JSONArray arr = data.getJSONArray("Members");

// Selected First Internal Object inside Array of "Members"
JSONObject obje = arr.getJSONObject(0);

// Printed out the "name" which is "new york"
System.out.println(obje.getString("name"));

The above code works according to the JSON given and parsed correctly. I think please investigate your response object's access modifiers.

Alternatively, you can use GSON or Jackson to parse your JSON.

CodePudding user response：

you can retreive the values like below

JSONObject jsonObj = new JSONObject(response.getBody());

JSONObject ja_data = jsonObj.getJSONObject("data");
JSONArray jaarr = ja_data.getJSONArray("Members");
JSONObject obj1 = jaarr.getJSONObject(0);
System.out.println(obj1.getString("name"));

It prints "new york"