@Test
public void testCHextConvert(){

    byte[] output = CHexConvert.hexStr2Bytes("3132333435363738393031323334353637383931");
    byte[] expect = {49, 50, 51, 52, 53, 54, 55, 56, 57, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 49};
    assertEquals(expect.length, output.length);
    for(int i=0; i<expect.length; i++)
        assertEquals(expect[i], output[i]);
}