android json转map

可以通过以下代码将一个 JSON 字符串转换为 Map 对象：

public static Map<String, Object> jsonToMap(String jsonString) throws JSONException {
    Map<String, Object> map = new HashMap<>();
    JSONObject jsonObject = new JSONObject(jsonString);
    Iterator<String> keysIterator = jsonObject.keys();
    while (keysIterator.hasNext()) {
        String key = keysIterator.next();
        Object value = jsonObject.get(key);
        if (value instanceof JSONArray) {
            value = jsonArrayToList((JSONArray) value);
        } else if (value instanceof JSONObject) {
            value = jsonToMap(value.toString());
        }
        map.put(key, value);
    }
    return map;
}

private static List<Object> jsonArrayToList(JSONArray array) throws JSONException {
    List<Object> list = new ArrayList<>();
    for (int i = 0; i < array.length(); i++) {
        Object value = array.get(i);
        if (value instanceof JSONArray) {
            value = jsonArrayToList((JSONArray) value);
        } else if (value instanceof JSONObject) {
            value = jsonToMap(value.toString());
        }
        list.add(value);
    }
    return list;
}

使用示例：

String jsonString = "{\"name\":\"Tom\",\"age\":20,\"friends\":[{\"name\":\"Jerry\",\"age\":18},{\"name\":\"Mickey\",\"age\":22}]}";
Map<String, Object> map = jsonToMap(jsonString);
System.out.println(map.get("name")); // Tom
System.out.println(map.get("age")); // 20
List<Object> friends = (List<Object>) map.get("friends");
System.out.println(friends.get(0)); // {name=Jerry, age=18}
System.out.println(friends.get(1)); // {name=Mickey, age=22}