企业网站推广制作教程,二建考试查询入口,企业网站优化包括哪三个层面,网站维护方式在实际项目开发过程中#xff0c;获取任意时间的起始和结束时间是常用操作#xff0c;尤其对于统计业务来说#xff0c;更是必要操作#xff0c;理解了时间自定义的规律#xff0c;对于开发人员的效率提升是大有裨益的。
一.获取任意年的起始和结束时间 1.获取任意年的起…在实际项目开发过程中获取任意时间的起始和结束时间是常用操作尤其对于统计业务来说更是必要操作理解了时间自定义的规律对于开发人员的效率提升是大有裨益的。
一.获取任意年的起始和结束时间 1.获取任意年的起始时间
public static Date getDateByBeforeYear(Date today, int number) {Calendar todayEnd Calendar.getInstance();todayEnd.setTime(today);todayEnd.set(Calendar.YEAR, todayEnd.get(Calendar.YEAR) - number);todayEnd.set(Calendar.MONTH, 0);todayEnd.set(Calendar.DAY_OF_MONTH, 1);todayEnd.set(Calendar.HOUR_OF_DAY, 0);todayEnd.set(Calendar.MINUTE, 0);todayEnd.set(Calendar.SECOND, 0);todayEnd.set(Calendar.MILLISECOND, 0);return todayEnd.getTime();
}
2.获取任意年的结束时间
public static Date getDateByAfterYearNew(Date today, int number) {Calendar todayEnd Calendar.getInstance();todayEnd.setTime(today);todayEnd.set(Calendar.YEAR, todayEnd.get(Calendar.YEAR) - number);todayEnd.set(Calendar.MONTH, 11);todayEnd.set(Calendar.DAY_OF_MONTH, 31);todayEnd.set(Calendar.HOUR_OF_DAY, 23);todayEnd.set(Calendar.MINUTE, 59);todayEnd.set(Calendar.SECOND, 59);todayEnd.set(Calendar.MILLISECOND, 999);return todayEnd.getTime();
} 二.获取任意月的起始和结束时间 1.获取任意月的起始时间
public static Date getDateByBeforeMonth(Date today, int number) {Calendar todayEnd Calendar.getInstance();todayEnd.setTime(today);todayEnd.set(Calendar.MONTH, todayEnd.get(Calendar.MONTH) - number);todayEnd.set(Calendar.DAY_OF_MONTH, 1);todayEnd.set(Calendar.HOUR_OF_DAY, 0);todayEnd.set(Calendar.MINUTE, 0);todayEnd.set(Calendar.SECOND, 0);todayEnd.set(Calendar.MILLISECOND, 0);return todayEnd.getTime();
}
2.获取任意月的结束时间
public static Date getDateByAfterMonthNew(Date today, int number) {Calendar todayEnd Calendar.getInstance();todayEnd.setTime(today);todayEnd.set(Calendar.MONTH, todayEnd.get(Calendar.MONTH)-number);todayEnd.set(Calendar.DAY_OF_MONTH, 0);todayEnd.set(Calendar.HOUR_OF_DAY, 23);todayEnd.set(Calendar.MINUTE, 59);todayEnd.set(Calendar.SECOND, 59);todayEnd.set(Calendar.MILLISECOND, 999);return todayEnd.getTime();
}
三.获取任意日的起始和结束时间 1.获取任意日的起始时间
public static Date getDateByBeforeDay(Date today, int day) {Calendar todayEnd Calendar.getInstance();todayEnd.setTime(today);todayEnd.set(Calendar.DAY_OF_MONTH, todayEnd.get(Calendar.DAY_OF_MONTH) - day);todayEnd.set(Calendar.HOUR_OF_DAY, 0);todayEnd.set(Calendar.MINUTE, 0);todayEnd.set(Calendar.SECOND, 0);todayEnd.set(Calendar.MILLISECOND, 0);return todayEnd.getTime();
}
2.获取任意日的结束时间
public static Date getDateByAfterDayNew(Date today, int day) {Calendar todayEnd Calendar.getInstance();todayEnd.setTime(today);todayEnd.set(Calendar.DAY_OF_MONTH, todayEnd.get(Calendar.DAY_OF_MONTH) - day);todayEnd.set(Calendar.HOUR_OF_DAY, 23);todayEnd.set(Calendar.MINUTE, 59);todayEnd.set(Calendar.SECOND, 59);todayEnd.set(Calendar.MILLISECOND, 999);return todayEnd.getTime();
}
四.获取任意时的起始和结束时间 1.获取任意时的起始时间
public static Date getDateByBeforeHour(Date today, int number) {Calendar todayEnd Calendar.getInstance();todayEnd.setTime(today);todayEnd.set(Calendar.HOUR_OF_DAY, todayEnd.get(Calendar.HOUR_OF_DAY) - number);todayEnd.set(Calendar.MINUTE, 0);todayEnd.set(Calendar.SECOND, 0);todayEnd.set(Calendar.MILLISECOND, 0);return todayEnd.getTime();
} 2.获取任意时的结束时间
public static Date getDateByAfterHourNew(Date today, int number) {Calendar todayEnd Calendar.getInstance();todayEnd.setTime(today);todayEnd.set(Calendar.HOUR_OF_DAY, todayEnd.get(Calendar.HOUR_OF_DAY) - number);todayEnd.set(Calendar.MINUTE, 59);todayEnd.set(Calendar.SECOND, 59);todayEnd.set(Calendar.MILLISECOND, 999);return todayEnd.getTime();
}
五.获取任意时间的周信息
public static Integer getWeekOfDate(Date date) {Integer[] weekDays {7, 1, 2, 3, 4, 5, 6};Calendar cal Calendar.getInstance();cal.setTime(date);int w cal.get(Calendar.DAY_OF_WEEK) - 1;if (w 0) {w 0;}return weekDays[w];
} 六.获取任意时间是否在时间区间内
public static boolean belongCalendar(Date queryTime, Date from, Date to) {Calendar queryInfo Calendar.getInstance();queryInfo .setTime(queryTime);Calendar after Calendar.getInstance();after.setTime(from);Calendar before Calendar.getInstance();before.setTime(to);if (queryInfo.after(after) queryInfo.before(before)) {return true;} else {return false;}
} 七.其他相关方法持续更新中
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