java的定时器

package com.bridata.dmp.system.user.timer;

import com.bridata.core.tool.utils.Func;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import java.util.Set;
/**
 * Date: 2022/1/12:14:05  <br/>
 * Description:定时计算当前用户在线时长
 * @author gmx
 */
@Component
@Slf4j
public class OnLineTimer {

    @Autowired
    private RedisTemplate redisTemplate;

    @Scheduled(cron = "0 0/1 * * * ? ")
    public void countOnlineTime(){
        //今日所有登陆用户
        Set userIds = redisTemplate.boundSetOps("userIds").members();
        for (Object userId:userIds) {
            //所有在线时长
            Long allTime = Func.toLong(redisTemplate.boundHashOps("allTime").get(userId));
            //当前时间
            long nowTime = System.currentTimeMillis();
            //上一次登陆时间
            long endTime = Func.toLong(redisTemplate.boundHashOps("endTime").get(userId));
            long timeDiff = nowTime - endTime;
            //当前时间到上次请求时间是否超过一分钟，若未超过，在线时间加一分钟
            if (timeDiff < 60 * 1000) {
                long newTime = allTime + 60 * 1000;
                //将新增后在线时长放入reids
                redisTemplate.boundHashOps("allTime").put(userId, newTime);
            }
        }
    }
}


Cron - 在线Cron表达式生成器 (ciding.cc)