<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xmlns:p="http://www.springframework.org/schema/p" xmlns:task="http://www.springframework.org/schema/task" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop"  xsi:schemaLocation="http://www.springframework.org/schema/beans  http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd  http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd  http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd  http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd  http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.0.xsd"> <task:annotation-driven /> <!-- 定时器开关--> <bean id="myTask" class="com.spring.task.MyTask"></bean> <task:scheduled-tasks> <!-- 这里表示的是每隔五秒执行一次 --> <task:scheduled ref="myTask" method="show" cron="*/5 * * * * ?" /> <task:scheduled ref="myTask" method="print" cron="*/10 * * * * ?"/> </task:scheduled-tasks> <!-- 自动扫描的包名 --><context:component-scan base-package="com.spring.task" /> </beans>

package com.spring.task; /** * 定义任务 */
public class MyTask { public void show() { System.out.println("show method 1"); } public void print() { System.out.println("print method 1"); }
}

package com.spring.task;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component; /*** 基于注解的定时器 */
@Component
public class MyTask2 { /*** 定时计算。每天凌晨 01:00 执行一次*/@Scheduled(cron = "0 0 1 * * *")public void show() {System.out.println("show method 2"); } /*** 启动时执行一次，之后每隔2秒执行一次 */@Scheduled(fixedRate = 1000*2)  public void print() { System.out.println("print method 2");}
}

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId>
</dependency>

@SpringBootApplication
@EnableScheduling
public class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}

@Component
public class MyTask3 {private int count=0;@Scheduled(cron="*/6 * * * * ?")private void process() {System.out.println("this is scheduler task runing "+(count++));}
}

@Target({ElementType.METHOD, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Repeatable(Schedules.class)
public @interface Scheduled {String cron() default "";String zone() default "";long fixedDelay() default -1;String fixedDelayString() default "";long fixedRate() default -1;String fixedRateString() default "";long initialDelay() default -1;String initialDelayString() default "";
}