89 lines
2.5 KiB
Java
89 lines
2.5 KiB
Java
package com.nlf.calendar;
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import com.nlf.calendar.util.SolarUtil;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.TimeZone;
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/**
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* 精确日期
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*
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* @author 6tail
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*/
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public class ExactDate {
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/**
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* 时区
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*/
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private static final TimeZone TIME_ZONE = TimeZone.getTimeZone("GMT+8");
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@SuppressWarnings("MagicConstant")
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public static Calendar fromYmdHms(int year, int month, int day, int hour, int minute, int second) {
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Calendar c = Calendar.getInstance(TIME_ZONE);
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c.set(year, month - 1, day, hour, minute, second);
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c.set(Calendar.MILLISECOND, 0);
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if (0 == year) {
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c.add(Calendar.YEAR, 1);
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}
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return c;
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}
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public static Calendar fromYmd(int year, int month, int day) {
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return fromYmdHms(year, month, day, 0, 0, 0);
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}
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public static Calendar fromDate(Date date) {
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Calendar c = Calendar.getInstance(TIME_ZONE);
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c.setTime(date);
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c.set(Calendar.MILLISECOND, 0);
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return c;
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}
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/**
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* 获取两个日期之间相差的天数（如果日期a比日期b小，天数为正，如果日期a比日期b大，天数为负）
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*
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* @param ay 年a
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* @param am 月a
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* @param ad 日a
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* @param by 年b
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* @param bm 月b
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* @param bd 日b
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* @return 天数
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*/
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public static int getDaysBetween(int ay, int am, int ad, int by, int bm, int bd) {
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int n;
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int days;
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int i;
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if (ay == by) {
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n = SolarUtil.getDaysInYear(by, bm, bd) - SolarUtil.getDaysInYear(ay, am, ad);
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} else if (ay > by) {
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days = SolarUtil.getDaysOfYear(by) - SolarUtil.getDaysInYear(by, bm, bd);
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for (i = by + 1; i < ay; i++) {
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days += SolarUtil.getDaysOfYear(i);
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}
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days += SolarUtil.getDaysInYear(ay, am, ad);
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n = -days;
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} else {
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days = SolarUtil.getDaysOfYear(ay) - SolarUtil.getDaysInYear(ay, am, ad);
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for (i = ay + 1; i < by; i++) {
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days += SolarUtil.getDaysOfYear(i);
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}
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days += SolarUtil.getDaysInYear(by, bm, bd);
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n = days;
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}
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return n;
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}
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/**
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* 获取两个日期之间相差的天数（如果日期a比日期b小，天数为正，如果日期a比日期b大，天数为负）
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*
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* @param calendar0 日期a
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* @param calendar1 日期b
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* @return 天数
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*/
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public static int getDaysBetween(Calendar calendar0, Calendar calendar1) {
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return getDaysBetween(calendar0.get(Calendar.YEAR), calendar0.get(Calendar.MONTH) + 1, calendar0.get(Calendar.DATE), calendar1.get(Calendar.YEAR), calendar1.get(Calendar.MONTH) + 1, calendar1.get(Calendar.DATE));
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}
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}
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