public static Coordinate wgs84ToGcj02(double lng, double lat) {
		return new Coordinate(lng, lat).offset(offset(lng, lat, true));
	}
@Test
	public void wgs84ToGcj02Test() {
		final CoordinateUtil.Coordinate coordinate = CoordinateUtil.wgs84ToGcj02(116.404, 39.915);
		assertEquals(116.41024449916938D, coordinate.getLng(), 0);
		assertEquals(39.91640428150164D, coordinate.getLat(), 0);
	}