Spring Boot中使用定时任务

corn表达式在线连接

https://cron.qqe2.com/

1. 在主启动类添加注解

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableScheduling;

@EnableScheduling
@SpringBootApplication
public class QuartzApplication {

public static void main(String[] args) {
SpringApplication.run(QuartzApplication.class, args);
}

}

2. 编写定时任务类

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

/**
* @author Muluo
* @create 2022-04-07 10:45
*/
@Component
public class QuartzTask {
private int i = 0;

@Scheduled(cron = "*/5 * * * * ?")
public void printInfo() {
System.out.println(i++);
}
}

3. 运行结果

4. corn表达式解释