1. 在主启动类添加注解

package com.muluo;

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

package com.muluo.quartz;

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