Spring @SCHEDULED (CRON = "0 0 * * *?") Implementing timed Tasks

Spring config file xmlns join

xmlns:task= "Http://www.springframework.org/schema/task"

Join in Xsi:schemalocation

     Http://www.springframework.org/schema/task     http://www.springframework.org/schema/task/spring-task-3.0.xsd "

Configuration of Spring Scan annotations

<context:component-scan base-package= "com.imwoniu.*"/>

Task Scan Annotations

<task:executor id= "Executor" pool-size= "5"/>  <task:scheduler id= "Scheduler" pool-size= "  />" <task:annotation-driven executor= "Executor" scheduler= "Scheduler"/>

Code implementation:

Note @scheduled can be added as a trigger source to a method, for example, the following method will be executed at a fixed delay time of 5 seconds, which is the completion time of one of the above calling tasks, and after the previous task completes, 5s executes again:

@Scheduled (Fixeddelay = periodically) public void dosomething () {     //something that should execute}

If you need to perform at a fixed rate, as long as you change the name of the property specified in the annotation to Fixedrate, the following method invokes the execution at a fixed rate of 5s, which is the baseline of the above task start time, and is called again after the previous task begins execution 5s:

@Scheduled (fixedrate = periodically) public void dosomething () {     //something that should execute}

If a simple recurring schedule cannot be met, the CRON expression provides the possibility

Package Com.imwoniu.task;import Org.springframework.scheduling.annotation.scheduled;import　　org.springframework.stereotype.Component; @Componentpublic class Taskdemo {        @Scheduled (cron = "0 0 2 * *?") Execute        void Dosomethingwith () {            logger.info ("Scheduled task start ...") every day two o'clock in the morning;            Long begin = System.currenttimemillis ();                    Perform database operation Oh ...                    Long end = System.currenttimemillis ();            Logger.info ("Timed task end, total time: [" + (End-begin)/1000 + "] seconds");}    }

　　

sequentially seconds (0~59)

Minutes (0~59)

Hours (0~23)

Days (months) (0~31, but you need to consider the number of days of your month)

Month (0~11)

Days (weeks) (1~7 1=sun or Sun,mon,tue,wed,thu,fri,sat)

7. Year (1970-2099)

Spring @SCHEDULED (CRON = "0 0 * * *?") Implementing timed Tasks