public static JSONObject createObj() {
		return new JSONObject();
	}
@Test
	public void sqlExceptionTest() {
		//https://github.com/dromara/hutool/issues/1399
		// SQLException实现了Iterable接口，默认是遍历之，会栈溢出，修正后只返回string
		final JSONObject set = JSONUtil.createObj().set("test", new SQLException("test"));
		assertEquals("{\"test\":\"java.sql.SQLException: test\"}", set.toString());
	}