【Java/DateTime】用当前日期时间与确定日期时间比较，大于则执行某动作

代码：

package logbackCfg;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class NewDayThread {
    private final static Logger logger = LoggerFactory.getLogger(NewDayThread.class);

    public static void main(String[] args) throws InterruptedException {
        
        while(true) {
            Date currentTime = new Date();
            
            if(currentTime.compareTo(fixedDate())>0) {
                Thread.sleep(8000);
                logger.info("万里赴戎机，关山度若飞。");
                logger.error("朔气传金柝，寒光照铁衣。");
                logger.debug("将军百战死，壮士十年归。");
            }
        }
    }
    
    private static Date fixedDate() {
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        try {
            return formatter.parse("2020-01-16 10:39:00");
        } catch (ParseException e) {
            return new Date();
        }
    }
}

上面代码就是那当前时间与2020-01-16 10:39:00 比较，如果大于则写log。

以下就是线程在设定时间写log的效果：

...
2020-01-16 23:59:40.808 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-16 23:59:42.527 [main] INFO  logbackCfg.App2 -九里山前作战场
2020-01-16 23:59:42.527 [main] ERROR logbackCfg.App2 -牧童拾得旧刀枪
2020-01-16 23:59:42.527 [main] DEBUG logbackCfg.App2 -微风吹皱乌江水
2020-01-16 23:59:42.527 [main] TRACE logbackCfg.App2 -恰似虞姬别霸王
2020-01-16 23:59:45.809 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-16 23:59:45.809 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-16 23:59:45.809 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-16 23:59:45.809 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-16 23:59:50.528 [main] INFO  logbackCfg.App2 -九里山前作战场
2020-01-16 23:59:50.528 [main] ERROR logbackCfg.App2 -牧童拾得旧刀枪
2020-01-16 23:59:50.528 [main] DEBUG logbackCfg.App2 -微风吹皱乌江水
2020-01-16 23:59:50.528 [main] TRACE logbackCfg.App2 -恰似虞姬别霸王
2020-01-16 23:59:50.809 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-16 23:59:50.809 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-16 23:59:50.809 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-16 23:59:50.809 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-16 23:59:55.810 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-16 23:59:55.810 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-16 23:59:55.810 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-16 23:59:55.810 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-16 23:59:58.529 [main] INFO  logbackCfg.App2 -九里山前作战场
2020-01-16 23:59:58.529 [main] ERROR logbackCfg.App2 -牧童拾得旧刀枪
2020-01-16 23:59:58.529 [main] DEBUG logbackCfg.App2 -微风吹皱乌江水
2020-01-16 23:59:58.529 [main] TRACE logbackCfg.App2 -恰似虞姬别霸王
2020-01-17 00:00:00.810 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-17 00:00:00.810 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-17 00:00:00.810 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-17 00:00:00.810 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-17 00:00:05.811 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-17 00:00:05.811 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-17 00:00:05.811 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-17 00:00:05.811 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-17 00:00:06.530 [main] INFO  logbackCfg.App2 -九里山前作战场
2020-01-17 00:00:06.530 [main] ERROR logbackCfg.App2 -牧童拾得旧刀枪
2020-01-17 00:00:06.530 [main] DEBUG logbackCfg.App2 -微风吹皱乌江水
2020-01-17 00:00:06.530 [main] TRACE logbackCfg.App2 -恰似虞姬别霸王
2020-01-17 00:00:08.004 [main] INFO  logbackCfg.NewDayThread -万里赴戎机，关山度若飞。
2020-01-17 00:00:08.007 [main] ERROR logbackCfg.NewDayThread -朔气传金柝，寒光照铁衣。
2020-01-17 00:00:08.007 [main] DEBUG logbackCfg.NewDayThread -将军百战死，壮士十年归。
2020-01-17 00:00:10.811 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-17 00:00:10.811 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-17 00:00:10.811 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-17 00:00:10.811 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-17 00:00:14.530 [main] INFO  logbackCfg.App2 -九里山前作战场
2020-01-17 00:00:14.530 [main] ERROR logbackCfg.App2 -牧童拾得旧刀枪
2020-01-17 00:00:14.530 [main] DEBUG logbackCfg.App2 -微风吹皱乌江水
2020-01-17 00:00:14.530 [main] TRACE logbackCfg.App2 -恰似虞姬别霸王
2020-01-17 00:00:15.812 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-17 00:00:15.812 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-17 00:00:15.812 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-17 00:00:15.812 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-17 00:00:16.008 [main] INFO  logbackCfg.NewDayThread -万里赴戎机，关山度若飞。
2020-01-17 00:00:16.008 [main] ERROR logbackCfg.NewDayThread -朔气传金柝，寒光照铁衣。
2020-01-17 00:00:16.008 [main] DEBUG logbackCfg.NewDayThread -将军百战死，壮士十年归。
2020-01-17 00:00:20.812 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-17 00:00:20.812 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-17 00:00:20.812 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-17 00:00:20.812 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-17 00:00:22.530 [main] INFO  logbackCfg.App2 -九里山前作战场
2020-01-17 00:00:22.530 [main] ERROR logbackCfg.App2 -牧童拾得旧刀枪
2020-01-17 00:00:22.530 [main] DEBUG logbackCfg.App2 -微风吹皱乌江水
2020-01-17 00:00:22.530 [main] TRACE logbackCfg.App2 -恰似虞姬别霸王
2020-01-17 00:00:24.008 [main] INFO  logbackCfg.NewDayThread -万里赴戎机，关山度若飞。
2020-01-17 00:00:24.008 [main] ERROR logbackCfg.NewDayThread -朔气传金柝，寒光照铁衣。
2020-01-17 00:00:24.008 [main] DEBUG logbackCfg.NewDayThread -将军百战死，壮士十年归。
2020-01-17 00:00:25.812 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-17 00:00:25.812 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-17 00:00:25.812 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-17 00:00:25.812 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-17 00:00:30.531 [main] INFO  logbackCfg.App2 -九里山前作战场
2020-01-17 00:00:30.531 [main] ERROR logbackCfg.App2 -牧童拾得旧刀枪
2020-01-17 00:00:30.531 [main] DEBUG logbackCfg.App2 -微风吹皱乌江水
2020-01-17 00:00:30.531 [main] TRACE logbackCfg.App2 -恰似虞姬别霸王
2020-01-17 00:00:30.812 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-17 00:00:30.812 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-17 00:00:30.812 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-17 00:00:30.812 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-17 00:00:32.009 [main] INFO  logbackCfg.NewDayThread -万里赴戎机，关山度若飞。
2020-01-17 00:00:32.009 [main] ERROR logbackCfg.NewDayThread -朔气传金柝，寒光照铁衣。
2020-01-17 00:00:32.009 [main] DEBUG logbackCfg.NewDayThread -将军百战死，壮士十年归。
2020-01-17 00:00:35.812 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-17 00:00:35.812 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-17 00:00:35.812 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-17 00:00:35.812 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-17 00:00:38.532 [main] INFO  logbackCfg.App2 -九里山前作战场
2020-01-17 00:00:38.532 [main] ERROR logbackCfg.App2 -牧童拾得旧刀枪
2020-01-17 00:00:38.532 [main] DEBUG logbackCfg.App2 -微风吹皱乌江水
2020-01-17 00:00:38.532 [main] TRACE logbackCfg.App2 -恰似虞姬别霸王
2020-01-17 00:00:40.010 [main] INFO  logbackCfg.NewDayThread -万里赴戎机，关山度若飞。
2020-01-17 00:00:40.010 [main] ERROR logbackCfg.NewDayThread -朔气传金柝，寒光照铁衣。
2020-01-17 00:00:40.010 [main] DEBUG logbackCfg.NewDayThread -将军百战死，壮士十年归。
2020-01-17 00:00:40.813 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-17 00:00:40.813 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-17 00:00:40.813 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-17 00:00:40.813 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-17 00:00:45.813 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-17 00:00:45.813 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-17 00:00:45.813 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-17 00:00:45.813 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-17 00:00:46.532 [main] INFO  logbackCfg.App2 -九里山前作战场
2020-01-17 00:00:46.532 [main] ERROR logbackCfg.App2 -牧童拾得旧刀枪
2020-01-17 00:00:46.532 [main] DEBUG logbackCfg.App2 -微风吹皱乌江水
2020-01-17 00:00:46.532 [main] TRACE logbackCfg.App2 -恰似虞姬别霸王
2020-01-17 00:00:48.010 [main] INFO  logbackCfg.NewDayThread -万里赴戎机，关山度若飞。
2020-01-17 00:00:48.010 [main] ERROR logbackCfg.NewDayThread -朔气传金柝，寒光照铁衣。
2020-01-17 00:00:48.010 [main] DEBUG logbackCfg.NewDayThread -将军百战死，壮士十年归。
2020-01-17 00:00:50.814 [main] INFO  logbackCfg.App -秦时明月汉时关
2020-01-17 00:00:50.814 [main] ERROR logbackCfg.App -万里长征人未还
2020-01-17 00:00:50.814 [main] DEBUG logbackCfg.App -但使龙城飞将在
2020-01-17 00:00:50.814 [main] TRACE logbackCfg.App -不教胡马度阴山
2020-01-17 00:00:54.533 [main] INFO  logbackCfg.App2 -九里山前作战场
2020-01-17 00:00:54.533 [main] ERROR logbackCfg.App2 -牧童拾得旧刀枪
2020-01-17 00:00:54.533 [main] DEBUG logbackCfg.App2 -微风吹皱乌江水
2020-01-17 00:00:54.533 [main] TRACE logbackCfg.App2 -恰似虞姬别霸王

--END-- 2020-01-16 10:48

【推广】 免费学中医，健康全家人
原文地址：https://www.cnblogs.com/heyang78/p/12199753.html