【Java基础】java 获得本日，本周，本月的时间戳区间

如果涉及到统计的话，可能会经常用到。很简单的基础知识。

1、getTimestampByOffsetDay

	public static long getTimestampByOffsetDay(int day){

		Calendar calendar = Calendar.getInstance();

		calendar.add(Calendar.DAY_OF_MONTH, day);

		calendar.set(Calendar.HOUR_OF_DAY, 0);

		calendar.set(Calendar.SECOND, 0);

		calendar.set(Calendar.MINUTE, 0);

		calendar.set(Calendar.MILLISECOND, 0);

		return calendar.getTimeInMillis();

	}

2、 getTodayTimestamp

	public static HashMap<String, Object> getTodayTimestamp(){

		HashMap<String, Object> hashMap = new HashMap<String, Object>();

		hashMap.put("startTime", getTimestampByOffsetDay(0));

		hashMap.put("endTime", getTimestampByOffsetDay(1));

		return hashMap;

	}

3、getWeekTimestamp

	public static HashMap<String, Object> getWeekTimestamp() {

		HashMap<String, Object> hashMap = new HashMap<String, Object>();

		Calendar calendar = Calendar.getInstance();

		hashMap.put(

				"startTime",

				getTimestampByOffsetDay(0 - calendar.get(Calendar.DAY_OF_WEEK) + 2));

		hashMap.put(

				"endTime",

				getTimestampByOffsetDay(calendar

						.getMaximum(Calendar.DAY_OF_WEEK)

						- calendar.get(Calendar.DAY_OF_WEEK) + 1));

		return hashMap;

	}

4、getMonthTimestamp

	public static HashMap<String, Object> getMonthTimestamp() {

		HashMap<String, Object> hashMap = new HashMap<String, Object>();

		Calendar calendar = Calendar.getInstance();

		hashMap.put(

				"startTime",

				getTimestampByOffsetDay(0 - calendar.get(Calendar.DAY_OF_MONTH) + 1));

		hashMap.put(

				"endTime",

				getTimestampByOffsetDay(calendar

						.getMaximum(Calendar.DAY_OF_MONTH)

						- calendar.get(Calendar.DAY_OF_MONTH)));

		return hashMap;

	}

巴特西

【Java基础】java 获得本日，本周，本月的时间戳区间

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