0 0/5 * * * ? 每5分钟执行1次 .... 2015-05-14 11:20:00 2015-05-14 11:25:00 2015-05-14 11:30:00 2015-05-14 11:35:00 2015-05-14 11:40:00 2015-05-14 11:45:00 2015-05-14 11:50:00 2015-05-14 11:55:00 2015-05-14 12:00:00 .....
0 0/5 * * * ?
每5分钟执行1次
....
2015-05-14 11:20:00
2015-05-14 11:25:00
2015-05-14 11:30:00
2015-05-14 11:35:00
2015-05-14 11:40:00
2015-05-14 11:45:00
2015-05-14 11:50:00
2015-05-14 11:55:00
2015-05-14 12:00:00
.....