public static String toString(Object obj) {
		if (null == obj) {
			return StrUtil.NULL;
		}
		if (obj instanceof Map) {
			return obj.toString();
		}

		return Convert.toStr(obj);
	}
@Test
	public void toStringTest() {
		ArrayList<String> strings = CollUtil.newArrayList("1", "2");
		String result = ObjectUtil.toString(strings);
		assertEquals("[1, 2]", result);
	}