使用的版本:1.2.61

@Test
	public void test() {
		JSONObject rootObject = new JSONObject();

		String sizePath = "size";
		String lengthPath = "length";

		System.out.println(JSONPath.contains(rootObject, sizePath));//返回true
		System.out.println(JSONPath.contains(rootObject, lengthPath));//返回true
		System.out.println(JSONPath.contains(rootObject, "item"));//返回false
	}