先序遍历
public static void main(String[] args) {
JSONObject object = JSONObject.parseObject(jsonString);
Node node = convertNode(object);
System.out.println(node.toString());
System.out.println("---------------------------");
System.out.println(getAllLeftArray(node));
System.out.println("---------------------------");
System.out.println(getAllRightArray(node));
}
