java中 快速獲取當天0點0分0秒（00:00:00），23點59分59秒（23:59:59）
// 利用Apache lang包快速獲取凌晨0點0分0秒，23點59分59秒字串
System.out.println(DateFormatUtils.format(new Date(), "yyyy-MM-dd 00:00:00"));
System.out.println(DateFormatUtils.format(new Date(), "yyyy-MM-dd 23:59:59"));
// 獲取當天凌晨0點0分0秒Date
Calendar calendar1 = Calendar.getInstance();
calendar1.set(calendar1.get(Calendar.YEAR), calendar1.get(Calendar.MONTH), calendar1.get(Calendar.DAY_OF_MONTH),
0, 0, 0);
Date beginOfDate = calendar1.getTime();
System.out.println(beginOfDate);
// 獲取當天23點59分59秒Date
Calendar calendar2 = Calendar.getInstance();
calendar1.set(calendar2.get(Calendar.YEAR), calendar2.get(Calendar.MONTH), calendar2.get(Calendar.DAY_OF_MONTH),
23, 59, 59);
Date endOfDate = calendar1.getTime();
System.out.println(endOfDate);
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作者：不羈魚Karle
來源：CSDN
原文：https://blog.csdn.net/qq_19260029/article/details/51489928
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