Spring scheduled implements timed tasks

1 introducing namespaces in the. XML configuration file

xmlns:task="http://www.springframework.org/schema/task"http://www.springframework.orghttp://www.springframework.org/schema/task/spring-task-3.0.xsd"

2 Setting up auto-discovery

<task

3 Add the @scheduled annotation to the method that requires timing execution, an example is as follows:

@Service Public  class areacacheservice implements Initializingbean {Ehcache Areacache;@Override     Public void Afterpropertiesset()throwsException {refresh (); }@Scheduled(Fixeddelay = +, InitialDelay = +) Public void Refresh() {SimpleDateFormat SDF =NewSimpleDateFormat ("YyyyMMdd HH:mm:ss"); System.out.println (Sdf.format (NewDate ()) +": Refresh Cache ..."); }}

The above example allows the method to continue executing after each execution, with the following results:

20160820 17:54:47:refresh Cache ...
20160820 17:54:48:refresh Cache ...
20160820 17:54:49:refresh Cache ...
20160820 17:54:50:refresh Cache ...
20160820 17:54:51:refresh Cache ...
20160820 17:54:52:refresh Cache ...

Attention:

Exactly one of the ' cron ', ' Fixeddelay (String) ', or ' fixedrate (string) ' attributes is required
(Cron, Fixddelay, fixedrate Three properties must be set one)

Attribute meaning:

Properties	explain
Cron	A cron-like expression, extending the usual un*x definition to include triggers on the second as well as minute, Hour, day of month, month and day of week.
Fixeddelay	Execute The annotated method with a fixed period in milliseconds between the end of the last invocation and the start of the next.
Fixeddelaystring	Execute The annotated method with a fixed period in milliseconds between the end of the last invocation and the start of T He next.
Fixedrate	Execute The annotated method with a fixed period in milliseconds between invocations.
Fixedratestring	Execute The annotated method with a fixed period in milliseconds between invocations.
InitialDelay	Number of milliseconds to delay before the first execution of a fixedrate () or Fixeddelay () task.
Initialdelaystring	Number of milliseconds to delay before the first execution of a fixedrate () or Fixeddelay () task.
Zone	A time zone for which the cron expression would be resolved.

You can also configure a scheduled task with a configuration file:

<task:scheduled-tasks>           <task:scheduled ref="taskJob" method="job1" cron="0 * * * * ?"/>   </task:scheduled-tasks>  

The taskJob corresponding JavaBean is the job1 method to be executed on a timed basis.

Spring scheduled implements timed tasks