Java Timer 2-spring Implementation

• Spring Timers (XML-based)
• Spring timers (based on annotations)
• Quartz Timer

1. Using the spring timer based on XML configuration, first write the timed task class MyTask

 Public class MyTask {    publicvoid  execute () {    System.out.println (" Spring timed tasks based on XML configuration! ");   }  }  

Then add the xmlns:task= "Http://www.springframework.org/schema/task" namespace to the spring configuration file

<Task:annotation-driven/>  <BeanID= "MyTask"class= "Com.pptv.vipbackend.controller.Mytask"/>  <Task:scheduled-tasks>  <task:scheduledref= "MyTask"Cron= "*/5 * * * *?"Method= "Print"/><!--executes every 5 seconds -  </Task:scheduled-tasks> 

Of course, timed task classes are added to spring's management

<base-package= "Com.simonsfan.study.controller.Mytask">  

Execution can see the effect 2, the use of annotations based on the spring timer based on annotations will be relatively simple, directly write task class MyTask:

@EnableScheduling  @Component  publicclass  mytask {    = "*/5 * * * * *?" Publicvoid  execute () {      System.out.println ("Spring timed task based on annotation configuration! )     ");    }  }  

Of course, task classes are also included in spring management

<base-package= "Com.simonsfan.study.controller.Mytask">  <task:annotation-driven/>

Launch can see the same effect 3, quartz timer, its performance and flexibility are better than the JDK TimerTask class Pom file added

<Dependency>  <groupId>Org.quartz-scheduler</groupId>  <Artifactid>Quartz</Artifactid>  <version>2.2.2</version>  </Dependency> 

Timed Task Class MyTask:

@Component    Public class MyTask {    publicvoid  execute () {      System.out.println (" Implement timed tasks based on Spring+quartz! ");;    }  }  

In the spring configuration file, add:

<BeanID= "Jobbean"class= "Com.pptv.vipbackend.controller.Mytask"/>    <BeanID= "Myjobdetail"class= "Org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">  < Propertyname= "TargetObject">  <refBean= "Jobbean"/>  </ Property>  < Propertyname= "Targetmethod">  <value>Execute</value><!--method names in a task class -  </ Property>  <!--set concurrency to False -  < Propertyname= "Concurrent"value= "false" />  </Bean>  <BeanID= "Simpletrigger"class= "Org.springframework.scheduling.quartz.SimpleTriggerFactoryBean">  < Propertyname= "Jobdetail"ref= "Myjobdetail" />  < Propertyname= "Startdelay"value= "+" />  < Propertyname= "Repeatinterval"value= "$" />  </Bean>    <!--General Management Class if you lazy-init= ' false ' then the container starts executing the scheduler -  <BeanID= "Startquertz"class= "Org.springframework.scheduling.quartz.SchedulerFactoryBean"Lazy-init= "false"Autowire= "No">  < Propertyname= "Triggers">  <List>  <!--Job Scheduler, List can join other scheduler -  <refBean= "Simpletrigger" />  </List>  </ Property>  </Bean>  

In this way, the time expression in the scheduled task of scheduled tasks can be implemented based on Spring + Quartz:

Order:	Seconds	Minutes	Hours	Date	Month	Week	Year (optional)
Value:	0-59	0-59	0-23	1-30 (31)	1-12	1-7
Allow special characters:	, - * /	, - * /	, - * /	, - * / ? L W C	, - * /	,-*/L # C	1970-2099,-*/

Field meaning

*: Represents all possible values  -: Specified range  ,: List enumeration  For example in minutes, "5,15" means 5 minutes and 20 minutes trigger  /: Specify increments  for example in minutes, "3/15" means starting from 3 minutes, not every 15 minutes  ?: Indicates no specific value, use? Be aware of conflicts  L: Last, for example, 7 or sat in the month, 31 or 30,6l for the end of the month, Fril represents the last Friday of the month.  W: Can only be used in the month, representing the day of the week that is closest to the specified day  #: only in the weeks  The first few weeks of the month, for example, 6#3 represents the 3rd Friday of this month, 0 * * * *? trigger once every    1 minutes  0 0 * * * Every 1 hours per day 0  0 10 * * * 10 triggers once a day 0  * 14 * * ? Every 1 minutes from 2 o'clock in the afternoon to 2:59 every day   0 30 9 1 *? 1th per month 9:30 A.M.  0 15 10 15 * Monthly 15th 10:15 Trigger */5 * * * * *  every 5 seconds to execute  0 */1 * * *? Execute once every 1 minutes  0 0 5-15 * * 5-15 dots per day trigger  0 0/3 * * *? trigger every three minutes  

Java Timer 2-spring Implementation