298 lines
7.2 KiB
Java
298 lines
7.2 KiB
Java
package com.nlf.calendar;
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import com.nlf.calendar.util.SolarUtil;
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import java.util.ArrayList;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.List;
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/**
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* 阳历周
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*
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* @author 6tail
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*/
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public class SolarWeek {
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/**
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* 年
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*/
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private int year;
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/**
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* 月
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*/
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private int month;
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/**
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* 日
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*/
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private int day;
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/**
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* 星期几作为一周的开始，1234560分别代表星期一至星期天
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*/
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private int start;
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/**
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* 默认当月
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*
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* @param start 星期几作为一周的开始，1234560分别代表星期一至星期天
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*/
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public SolarWeek(int start) {
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this(new Date(), start);
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}
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/**
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* 通过日期初始化
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*
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* @param start 星期几作为一周的开始，1234560分别代表星期一至星期天
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*/
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public SolarWeek(Date date, int start) {
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Calendar c = ExactDate.fromDate(date);
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year = c.get(Calendar.YEAR);
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month = c.get(Calendar.MONTH) + 1;
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day = c.get(Calendar.DATE);
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this.start = start;
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}
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/**
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* 通过日历初始化
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*
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* @param start 星期几作为一周的开始，1234560分别代表星期一至星期天
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*/
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public SolarWeek(Calendar calendar, int start) {
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year = calendar.get(Calendar.YEAR);
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month = calendar.get(Calendar.MONTH) + 1;
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day = calendar.get(Calendar.DATE);
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this.start = start;
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}
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/**
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* 通过年月初始化
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*
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* @param year 年
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* @param month 月，1到12
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* @param day 日，1到31
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* @param start 星期几作为一周的开始，1234560分别代表星期一至星期天
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*/
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public SolarWeek(int year, int month, int day, int start) {
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this.year = year;
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this.month = month;
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this.day = day;
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this.start = start;
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}
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/**
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* 通过指定日期获取阳历周
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*
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* @param date 日期
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* @param start 星期几作为一周的开始，1234560分别代表星期一至星期天
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* @return 阳历周
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*/
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public static SolarWeek fromDate(Date date, int start) {
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return new SolarWeek(date, start);
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}
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/**
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* 通过指定日历获取阳历周
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*
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* @param calendar 日历
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* @param start 星期几作为一周的开始，1234560分别代表星期一至星期天
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* @return 阳历周
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*/
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public static SolarWeek fromCalendar(Calendar calendar, int start) {
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return new SolarWeek(calendar, start);
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}
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/**
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* 通过指定年月日获取阳历周
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*
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* @param year 年
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* @param month 月，1到12
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* @param day 日，1到31
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* @param start 星期几作为一周的开始，1234560分别代表星期一至星期天
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* @return 阳历周
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*/
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public static SolarWeek fromYmd(int year, int month, int day, int start) {
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return new SolarWeek(year, month, day, start);
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}
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/**
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* 获取年
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*
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* @return 年
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*/
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public int getYear() {
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return year;
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}
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/**
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* 获取月
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*
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* @return 1到12
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*/
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public int getMonth() {
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return month;
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}
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/**
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* 获取日期
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*
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* @return 1到31之间的数字
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*/
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public int getDay() {
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return day;
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}
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/**
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* 获取星期几作为一周的开始，1234560分别代表星期一至星期天
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*
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* @return 1234560分别代表星期一至星期天
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*/
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public int getStart() {
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return start;
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}
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/**
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* 获取当前日期是在当月第几周
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*
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* @return 周序号，从1开始
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*/
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@SuppressWarnings("MagicConstant")
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public int getIndex() {
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Calendar c = ExactDate.fromYmd(year, month, 1);
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int firstDayWeek = c.get(Calendar.DAY_OF_WEEK) - 1;
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if (firstDayWeek == 0) {
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firstDayWeek = 7;
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}
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return (int) Math.ceil((day + firstDayWeek - start) / 7D);
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}
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/**
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* 周推移
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*
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* @param weeks 推移的周数，负数为倒推
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* @param separateMonth 是否按月单独计算
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* @return 推移后的阳历周
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*/
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@SuppressWarnings("MagicConstant")
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public SolarWeek next(int weeks, boolean separateMonth) {
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if (0 == weeks) {
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return new SolarWeek(year, month, day, start);
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}
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if (separateMonth) {
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int n = weeks;
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Calendar c = ExactDate.fromYmd(year, month, day);
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SolarWeek week = new SolarWeek(c, start);
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int month = this.month;
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boolean plus = n > 0;
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while (0 != n) {
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c.add(Calendar.DATE, plus ? 7 : -7);
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week = new SolarWeek(c, start);
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int weekMonth = week.getMonth();
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if (month != weekMonth) {
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int index = week.getIndex();
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if (plus) {
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if (1 == index) {
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Solar firstDay = week.getFirstDay();
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week = new SolarWeek(firstDay.getYear(), firstDay.getMonth(), firstDay.getDay(), start);
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weekMonth = week.getMonth();
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} else {
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c = ExactDate.fromYmd(week.getYear(), week.getMonth(), 1);
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week = new SolarWeek(c, start);
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}
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} else {
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int size = SolarUtil.getWeeksOfMonth(week.getYear(), week.getMonth(), start);
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if (size == index) {
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Solar firstDay = week.getFirstDay();
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Solar lastDay = firstDay.next(6);
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week = new SolarWeek(lastDay.getYear(), lastDay.getMonth(), lastDay.getDay(), start);
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weekMonth = week.getMonth();
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} else {
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c = ExactDate.fromYmd(week.getYear(), week.getMonth(), SolarUtil.getDaysOfMonth(week.getYear(), week.getMonth()));
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week = new SolarWeek(c, start);
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}
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}
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month = weekMonth;
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}
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n -= plus ? 1 : -1;
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}
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return week;
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} else {
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Calendar c = ExactDate.fromYmd(year, month, day);
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c.add(Calendar.DATE, weeks * 7);
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return new SolarWeek(c, start);
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}
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}
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/**
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* 获取本周第一天的阳历日期（可能跨月）
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*
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* @return 本周第一天的阳历日期
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*/
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@SuppressWarnings("MagicConstant")
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public Solar getFirstDay() {
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Calendar c = ExactDate.fromYmd(year, month, day);
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int week = c.get(Calendar.DAY_OF_WEEK) - 1;
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int prev = week - start;
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if (prev < 0) {
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prev += 7;
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}
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c.add(Calendar.DATE, -prev);
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return new Solar(c);
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}
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/**
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* 获取本周第一天的阳历日期（仅限当月）
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*
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* @return 本周第一天的阳历日期
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*/
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public Solar getFirstDayInMonth() {
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List<Solar> days = getDays();
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for (Solar day : days) {
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if (month == day.getMonth()) {
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return day;
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}
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}
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return null;
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}
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/**
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* 获取本周的阳历日期列表（可能跨月）
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*
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* @return 本周的阳历日期列表
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*/
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public List<Solar> getDays() {
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Solar firstDay = getFirstDay();
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List<Solar> l = new ArrayList<Solar>();
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l.add(firstDay);
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for (int i = 1; i < 7; i++) {
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l.add(firstDay.next(i));
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}
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return l;
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}
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/**
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* 获取本周的阳历日期列表（仅限当月）
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*
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* @return 本周的阳历日期列表（仅限当月）
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*/
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public List<Solar> getDaysInMonth() {
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List<Solar> days = this.getDays();
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List<Solar> l = new ArrayList<Solar>();
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for (Solar day : days) {
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if (month != day.getMonth()) {
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continue;
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}
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l.add(day);
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}
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return l;
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}
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@Override
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public String toString() {
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return year + "." + month + "." + getIndex();
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}
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public String toFullString() {
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return year + "年" + month + "月第" + getIndex() + "周";
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}
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}
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