SpringBoot实现动态定时任务的示例代码

task:
  cron: 0/10 * * * * ?
  timer: 10

import cn.hutool.core.date.DateUtil;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
import org.springframework.scheduling.support.PeriodicTrigger;

import java.util.Date;


@Data
@Slf4j
@Configuration
@EnableScheduling
@ConfigurationProperties(prefix = "task")
public class WorkScheduleTask  implements SchedulingConfigurer {

    private String cron;

    private Long timer;


    @Override

    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
        // 动态使用cron表达式设置循环间隔
        taskRegistrar.addTriggerTask(() -> {
            String dateTime = DateUtil.formatDateTime(new Date());
            String threadName = Thread.currentThread().getName();
            log.info("定时任务开始[configureTasks] :{},线程:{}", dateTime, threadName);
        }, triggerContext -> {
            // 使用CronTrigger触发器，可动态修改cron表达式来操作循环规则
            // 只能定义小于等于间隔59秒
//          CronTrigger cronTrigger = new CronTrigger(cron);
//          return cronTrigger.nextExecutionTime(triggerContext);

            // 能定义大于等于间隔59秒
            // 使用不同的触发器，为设置循环时间的关键，区别于CronTrigger触发器，
            // 该触发器可随意设置循环间隔时间，单位为毫秒
            long seconds = timer * 1000;  // 毫秒转秒
            PeriodicTrigger periodicTrigger = new PeriodicTrigger(seconds);
            return periodicTrigger.nextExecutionTime(triggerContext);
        });
    }
}

@Slf4j
@CrossOrigin
@RestController
@RequestMapping("/updateTask")
public class UpdateTaskController {

    @Resource
    private WorkScheduleTask workScheduleTask;

    @PostMapping("/updateCron")
    public String updateCron(String cron) {
        log.info("new cron :{}", cron);
        workScheduleTask.setCron(cron);
        return "ok";
    }

    @PostMapping("/updateTimer")
    public String updateTimer(Long timer) {
        log.info("new timer :{}", timer);
        workScheduleTask.setTimer(timer);
        return "ok";
    }

}