There are quite a few questions raised to convert json to HashMap.
I hope it helps everybody.
The following code will convert the direct values or Array of values, into a HashMap.
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1 Answer
// Function called recursively
private static Map getMap(JSONObject object, String json) throws Exception {
Map<String, Object> map = new HashMap<String, Object>();
Object jsonObject = null;
Iterator<String> keys = object.keys();
while (keys.hasNext()) {
String key = keys.next();
Object value = object.get(key);
if (value instanceof JSONObject) {
map.put(key, getMap((JSONObject) value, json));
continue;
}
// If value is in the form of array
if (value instanceof JSONArray) {
JSONArray array = ((JSONArray) value);
List list = new ArrayList();
for (int i = 0 ; i < array.length() ; i++) {
jsonObject = array.get(i);
if (jsonObject instanceof JSONObject) {
list.add(getMap((JSONObject) jsonObject, json));
} else {
list.add(jsonObject);
}
}
map.put(key, list);
continue;
}
map.put(key, value);
}
return map;
}
// Calling Method
public static Map<String, Object> convertJsonToMap(String json) {
Map<String, Object> map = new HashMap<String, Object>();
JSONObject jsonObject = null;
try {
if (null != json) {
jsonObject = new JSONObject(json);
map = getMap(jsonObject, json);
}
} catch (Exception e) {
throw new SystemException("Unable to read JSOn Object");
// TODO : Handle Exception
}
return map;
}