package com.wisely.highlight_spring4.ch4.taskscheduler;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableScheduling;
@Configuration
@ComponentScan("com.wisely.highlight_spring4.ch4.taskscheduler")
@EnableScheduling //1
public class TaskSchedulerConfig {
}

package com.wisely.highlight_spring4.ch4.taskscheduler;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;
@Service
public class ScheduledTaskService {
   private static final SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
   @Scheduled(fixedRate = 5000) //该方法是计划任务，使用fixedRate属性每隔固定时间执行。
   public void reportCurrentTime() {
      System.out.println("每隔五秒执行一次 " + dateFormat.format(new Date()));
    }
   @Scheduled(cron = "0 28 11 ? * *" ) //每天11点28分执行
   public void fixTimeExecution(){
     System.out.println("在指定时间 " + dateFormat.format(new Date())+"执行");
   }
}

package com.wisely.highlight_spring4.ch4.taskscheduler;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
public class Main {
   public static void main(String[] args) {
      AnnotationConfigApplicationContext context =
           new AnnotationConfigApplicationContext(TaskSchedulerConfig.class);
   }
}