Java @Scheduled定时器用法解析

    @Scheduled (cron= "0 0 21 * * ?" ) //每天晚上九点执行一次    21点

    public void taskCycle() throws   Exception{

        System.out.println( "############定时校验代金券过期任务开始执行" );

        }

@Scheduled (cron= "0 0 21 * * ?" ) 

@Configuration

@EnableScheduling

public class ScheduleConfig implements SchedulingConfigurer {

    @Override

    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {

        taskRegistrar.setScheduler(taskExecutor());

    }

    @Bean (destroyMethod= "shutdown" )

    public Executor taskExecutor() {

        return Executors.newScheduledThreadPool( 2 );

    }

}