Quarzt.net's Cron expression understanding

There are a lot of cron expressions about quarzt.net on the internet, but they are all basic syntax, and a little bit deeper is not.

For a basic syntax introduction, see:

Http://www.cnblogs.com/lzrabbit/archive/2012/04/14/2371420.html

A complex requirement was encountered in the project: during the 2014-01-01 to 2015-12-31 interval, the task is performed every two minutes from 00:10:00 to 08:20:00 every day.

At first I wanted to do it with a cron expression, it was wrong, and I didn't understand Cron.

Later in Csdn consulted a master, resolved, the connection address is as follows:

http://bbs.csdn.net/topics/390922376

In combination with the two-week project, the cron expression is recorded to facilitate the understanding of those who need it.

The hour can have the concept of interval, for example: 00 20 00-15/2 01-31 01-12? 2014-2014
is at 0 to 15 points of 20 points, every 2 hours to execute once.

But seconds and minutes have no concept of interval, because the interval depends on the hour;
For example: 00 20-30/2 00-15 01-31 01-12? 2014-2014
The meaning of this representation is 0 to 15 hours per hour of 20 to 30 minutes between every 2 minute execution.
Instead of 00:20:00 to 15:30:00 every 2 minutes.

0/30 11 00 01-31 01-12? 2014-2014
0/30 0 1-14 01-31 01-12? 2014-2014
0/30 0-40 15 01-31 01-12? 2014-2014
These three expressions mean: Execute 2 times at 0:11
Execute 2 times at 0 ticks from 1 to 14.
Execute once every 30 seconds at 15 points of 0 to 40 minutes

0/30 11-59 00 01-31 01-12? 2014-2014
0/30 * 1-14 01-31 01-12? 2014-2014
0/30 0-40 15 01-31 01-12? 2014-2014
These three expressions mean: 1 times every 30 seconds after 0:11
Executes 1 times every 30 seconds from 1 to 14.
Execute once every 30 seconds at 15 points of 0 to 40 minutes

0 49/2 00 01-31 01-12? 2014-2014
0 0/2 1-14 01-31 01-12? 2014-2014
0 0-21/2 15 01-31 01-12? 2014-2014
These three expressions mean: Start every 2 minutes at 0:49
Executes 1 times every 2 minutes from 1 to 14.
At 15 points of 0 to 21 minutes per 2-minute execution

Quarzt.net's Cron expression understanding