1. 启动类加注解

@EnableScheduling  --- org.springframework.scheduling.annotation.EnableScheduling
2. 保证包被扫描到，可以加@ComponentScan(basepackage = {"com.java.test"})

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

import java.text.SimpleDateFormat;
import java.util.Date;
//bean注入
@Component
public class DjtzScheduleTask {

　　//开启任务，默认单线程
    @Scheduled(cron = "0 1/1 * * * ?")
    public void exportPerMonth(){
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println("test" + simpleDateFormat.format(new Date()));
    }

}