定时任务执行时间动态配置，并且略微错开

这是一个较为复杂的定时任务需求，仅用简单的schedule注解无法满足需求

package com.wisedu.minos.deploy.school.api;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wisedu.minos.deploy.school.api.service.ApiService;
import com.wisedu.minos.deploy.school.dao.entity.UploadSettingsEntity;
import com.wisedu.minos.deploy.school.dao.mapper.UploadSettingsMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.Trigger;
import org.springframework.scheduling.TriggerContext;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;

import java.util.Date;
import java.util.List;
import java.util.Random;

@Component
public class Scheduling implements SchedulingConfigurer {
    protected final static Logger logger = LoggerFactory.getLogger(Scheduling.class);

    public static String cron;

    @Autowired
    private UploadSettingsMapper uploadSettingsMapper;

    @Autowired
    private ApiService apiService;

    public Scheduling() {
        cron = "0 0 2 * * *";
    }

    @Override
    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
        Runnable task = new Runnable() {
            @Override
            public void run() {
                try {
　　　　　　　　　　　　　　　　//错开
                    Thread.sleep((int)(Math.random()*60+1)*1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
　　　　　　　　　　　　//执行业务逻辑
                apiService.uploadInfo();
            }
        };
        Trigger trigger = new Trigger() {
            @Override
            public Date nextExecutionTime(TriggerContext triggerContext) {
                LambdaQueryWrapper<UploadSettingsEntity> eq = new LambdaQueryWrapper<UploadSettingsEntity>()
                        .eq(UploadSettingsEntity::getIsDeleted, 0);
                List<UploadSettingsEntity> uploadSettingsEntities = uploadSettingsMapper.selectList(eq);
                if(!CollectionUtils.isEmpty(uploadSettingsEntities)&&(uploadSettingsEntities.get(0).getTime()>=0&&uploadSettingsEntities.get(0).getTime()<24)){
                    //拼装cron表达式
　　　　　　　　　　　　cron = "0 0 "+uploadSettingsEntities.get(0).getTime()+" * * *";
                }
                CronTrigger trigger = new CronTrigger(cron);
                Date nextExec = trigger.nextExecutionTime(triggerContext);
                return nextExec;
            }
        };
        taskRegistrar.addTriggerTask(task, trigger);
    }
}