spring boot: @EnableScheduling開啟計划任務支持，@Scheduled計划任務聲明

spring boot:

@EnableScheduling開啟計划任務支持，

@Scheduled計划任務聲明

package ch2.scheduler2;

//日期轉換方式
import java.text.SimpleDateFormat;
import java.util.Date;

//計划任務聲明
import org.springframework.scheduling.annotation.Scheduled;
//spring組件注解
import org.springframework.stereotype.Service;

@Service
public class SchedulerService {

    private static final SimpleDateFormat dateFormat = new SimpleDateFormat("HH::mm::ss");
    
    @Scheduled(fixedRate=5000)
    public void proFixCurrentTime()
    {
        System.out.println("每5秒鍾執行一次：" + dateFormat.format(new Date()));
    }
    
    @Scheduled(cron="0 53 18 ? * *")
    public void cornCurrentTime()
    {
        System.out.println("自定執行時間: " + dateFormat.format(new Date()));
    }
    
    
}

 

package ch2.scheduler2;

//引入spring配置注解
import org.springframework.context.annotation.Configuration;
//引入spring自動載入注解
import org.springframework.context.annotation.ComponentScan;

//計划任務聲明類：開啟計划任務聲明
import org.springframework.scheduling.annotation.EnableScheduling;

//spring配置類聲明
@Configuration
//自動引入當前包下的service,component....
@ComponentScan("ch2.scheduler2")
//開啟對計划任務的支持
@EnableScheduling
public class TaskSchedulerConfig {

}

 

package ch2.scheduler2;
//引入容器
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

public class Main {

    public static void main(String[] args)
    {
        
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(TaskSchedulerConfig.class);
        //SchedulerService schedulerService = context.getBean(SchedulerService.class);
        
    }
    
}