Create a scheduled task in Spring3 using annotations (@Scheduled)

The use of annotations is enhanced in Spring3, where the scheduled tasks are enhanced, and it is now only two steps to create a scheduled task:

1. Create a Java class, add a method with no parameter and no return value, and decorate it with @scheduled annotations on the method;
2. Add three <task:****/> nodes in the spring configuration file;

Finally, the Java class created in the first step is to be a spring-manageable bean that can be written directly in XML or @component.

To schedule a task class:

/*** Com.zywang.spring.task.SpringTaskDemo.java *@authorZywang 2011-3-9*/ PackageCom.zywang.spring.task;Importorg.springframework.scheduling.annotation.Scheduled;Importorg.springframework.stereotype.Component;/*** Spring3 @Scheduled Demo *@authorZywang 2011-3-9spring configuration file:*/@Component Public classSpringtaskdemo {@Scheduled (Fixeddelay= 5000)    voidDosomethingwithdelay () {System.out.println ("I ' m doing with delay now!"); } @Scheduled (Fixedrate= 5000)    voiddosomethingwithrate () {System.out.println ("I ' m doing with rate now!"); } @Scheduled (Cron= "0/5 * * * * *")    voidDosomethingwith () {System.out.println ("I ' m doing with cron now!"); }}

Spring configuration file:

<?XML version= "1.0" encoding= "UTF-8"?><Beansxmlns= "Http://www.springframework.org/schema/beans"Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"Xmlns:task= "Http://www.springframework.org/schema/task"xsi:schemalocation= "Http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd Http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd ">    <!--enables the Spring Task @Scheduled programming Model -    <Task:executorID= "Executor"pool-size= "5" />    <Task:schedulerID= "Scheduler"pool-size= "Ten" />    <Task:annotation-drivenExecutor= "Executor"Scheduler= "Scheduler" /></Beans>

A few things to note:

1, spring @scheduled annotations need to write on the implementation,

2, the task method of the timer can not have a return value (if there is a return value, spring initialization will tell you that there is an error, you need to set a Proxytargetclass value of true, go to Baidu Google bar)

3, the implementation of the class to have component annotations @component

The rest is corn expression, specific use and parameters please Baidu Google,

"Seconds" "Minute" "Time" "Day" "Month" "Week" "Year"

Here are just a few examples.

Cron expression meaning
"0 0 12 * *?" Triggered 12 o'clock noon every day
"0 15 10?" * * "trigger 10:15 every day"
"0 15 10 * *?" Triggered 10:15 daily
"0 15 10 * *?" * "10:15 per day" trigger
"0 15 10 * *?" 2005 "2005-year daily 10:15 Trigger
"0 * 14 * *?" Daily from 2 o'clock in the afternoon to 2:59 per minute trigger
"0 0/5 14 * *?" Every 5 minutes from 2 o'clock in the afternoon to 2:55
"0 0/5 14,18 * *?" Daily from 2 o'clock in the afternoon to 2:55 and from 6 to 6:55 every 5 minutes for two time periods
"0 0-5 14 * *?" Daily 14:00 to 14:05 triggers per minute
"0 10,44 14?" 3 WED "March of 14:10 and 14:44 triggers per Wednesday
"0 15 10?" * MON-FRI "10:15 triggers per Monday, Tuesday, Wednesday, Thursday, Friday

Configurable property entries for the scheduled class:

String	cronA 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.
long	fixedDelayExecute The annotated method with a fixed period between the end of the last invocation and the start of the next.
String	fixedDelayStringExecute The annotated method with a fixed period between the end of the last invocation and the start of the next.
long	fixedRateExecute The annotated method with a fixed period between invocations.
String	fixedRateStringExecute The annotated method with a fixed period between invocations.
long	initialDelayNumber of milliseconds to delay before the first execution of a fixedRate() or fixedDelay() task.
String	initialDelayStringNumber of milliseconds to delay before the first execution of a fixedRate() or fixedDelay() task.
String	zoneA time zone for which the cron expression would be resolved.

The above is based on the Spring 3.0.5 version and the reference document is Spring-framework-reference-3.0.5.pdf

Create a scheduled task in Spring3 using annotations (@Scheduled)