日期处理工具类
package zxc.utils;import java.util.Calendar;import java.util.Date;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;import zxc.exceptions.LogicalException;public class CalendarUtil {protected static Loglog= LogFactory.getLog(CalendarUtil.class);/** 设置一个星期的第一天 */public static final intFIRST_DAY_OF_WEEK= Calendar.SUNDAY;/** 设置一年或一个月的第一个星期的最小天数 */public static final intMINIMAL_DAYS_IN_FIRST_WEEK= 1;/** * 取得当前日期是多少周,星期日被定为一周的第一天,第一周允许的最小天数为1 * * @param date * @return */public static int getWeekOfYear(Date date) {Calendar c = Calendar.getInstance();c.setFirstDayOfWeek(FIRST_DAY_OF_WEEK);c.setMinimalDaysInFirstWeek(MINIMAL_DAYS_IN_FIRST_WEEK);c.setTime(date);return c.get(Calendar.WEEK_OF_YEAR);}public static int getWeekOfyear(int year, int month, int date) {Calendar c = Calendar.getInstance();c.setFirstDayOfWeek(FIRST_DAY_OF_WEEK);c.setMinimalDaysInFirstWeek(MINIMAL_DAYS_IN_FIRST_WEEK);c.set(year, month, date);return getWeekOfYear(c.getTime());}/** * 总体上可以说是求一年的总周数,因为52*7=364,所以基本上此值应该为52,但是这里所要求的是一年中的最 * 后几天的WEEK_OF_YEAR的值,为什么不直接取12月31日的WEEK_OF_YEAR的值呢,这是因为根据 * setFirstDayOfWeek与setMinimalDaysInFirstWeek设置的值12月31日所WEEK_OF_YEAR字段所返回的值 * 很可能是下一年的第一个星期 * * @param year * @return */public static int getMaxWeekNumOfYear(int year) {Calendar c = Calendar.getInstance();c.setFirstDayOfWeek(FIRST_DAY_OF_WEEK);c.setMinimalDaysInFirstWeek(MINIMAL_DAYS_IN_FIRST_WEEK);c.set(year, Calendar.DECEMBER, 31);return c.get(Calendar.WEEK_OF_YEAR) == 1 ? 52 : c.get(Calendar.WEEK_OF_YEAR);}/** * 获取某年第一周的天数 * * @param year * @return */public static int getDaysOfFirstWeek(int year) {Calendar c = Calendar.getInstance();c.setFirstDayOfWeek(FIRST_DAY_OF_WEEK);c.setMinimalDaysInFirstWeek(MINIMAL_DAYS_IN_FIRST_WEEK);c.set(year, Calendar.JANUARY, 1);return 8 - c.get(Calendar.DAY_OF_WEEK);}/** * 取得当前日期所在周的第一天 * * @param date * @return */public static Date getFirstDayOfWeek(Date date) {Calendar c = Calendar.getInstance();c.setFirstDayOfWeek(FIRST_DAY_OF_WEEK);c.setMinimalDaysInFirstWeek(MINIMAL_DAYS_IN_FIRST_WEEK);c.setTime(date);c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek());return c.getTime();}public static Date getFirstDayOfWeek(int year, int month, int date) {Calendar c = Calendar.getInstance();c.setFirstDayOfWeek(FIRST_DAY_OF_WEEK);c.setMinimalDaysInFirstWeek(MINIMAL_DAYS_IN_FIRST_WEEK);c.set(year, month, date);return getFirstDayOfWeek(c.getTime());}/** * 取得当前日期所在周的最后一天 * * @param date * @return */public static Date getLastDayOfWeek(Date date) {Calendar c = Calendar.getInstance();c.setFirstDayOfWeek(FIRST_DAY_OF_WEEK);c.setMinimalDaysInFirstWeek(MINIMAL_DAYS_IN_FIRST_WEEK);c.setTime(date);c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek() == 1 ? 7 : (c.getFirstDayOfWeek() + 6) % 7);return c.getTime();}public static Date getLastDayOfWeek(int year, int month, int date) {Calendar c = Calendar.getInstance();c.setFirstDayOfWeek(FIRST_DAY_OF_WEEK);c.setMinimalDaysInFirstWeek(MINIMAL_DAYS_IN_FIRST_WEEK);c.set(year, month, date);return getLastDayOfWeek(c.getTime());}/** * 获取两个日期间的周次差,这两个日期要么在同一年,要么是相邻的两个年份 * * @param start * @param end * @return */public static int getDeltaWeeks(Date start, Date end) {Calendar cs = Calendar.getInstance();Calendar ce = Calendar.getInstance();cs.setTime(start);ce.setTime(end);int s = getWeekOfYear(start);int e = getWeekOfYear(end);return cs.get(Calendar.YEAR) == ce.get(Calendar.YEAR) ? e - s : e - s + getMaxWeekNumOfYear(cs.get(Calendar.YEAR));}public static int getDeltaWeeks2(Date start, Date end) {Calendar cs = Calendar.getInstance();Calendar ce = (Calendar) cs.clone();Calendar ct = Calendar.getInstance();ct.setTime(start);cs.set(ct.get(Calendar.YEAR), ct.get(Calendar.MONTH), ct.get(Calendar.DATE));ct.setTime(end);ce.set(ct.get(Calendar.YEAR), ct.get(Calendar.MONTH), ct.get(Calendar.DATE));cs.setTime(getFirstDayOfWeek(cs.getTime()));ce.setTime(getFirstDayOfWeek(ce.getTime()));return (int) ((ce.getTimeInMillis() - cs.getTimeInMillis()) / (7 * 24 * 60 * 60 * 1000) + 1);}/** * 得到某年某周的第一天 * * @param year * @param week * @return */public static Date getFirstDayOfWeek(int year, int week) {Calendar c = Calendar.getInstance();c.setFirstDayOfWeek(FIRST_DAY_OF_WEEK);c.setMinimalDaysInFirstWeek(MINIMAL_DAYS_IN_FIRST_WEEK);c.set(year, Calendar.JANUARY, 1);c.add(Calendar.DATE, week * 7);return getFirstDayOfWeek(c.getTime());}/** * 得到某年某周的最后一天 * * @param year * @param week * @return */public static Date getLastDayOfWeek(int year, int week) {Calendar c = Calendar.getInstance();c.setFirstDayOfWeek(FIRST_DAY_OF_WEEK);c.setMinimalDaysInFirstWeek(MINIMAL_DAYS_IN_FIRST_WEEK);c.set(year, Calendar.JANUARY, 1);c.add(Calendar.DATE, week * 7);return getLastDayOfWeek(c.getTime());}/** * 获取当前日期所在月份的第一天 * * @param date * @return */public static Date getFirstDayOfMonth(Date date) {Calendar c = Calendar.getInstance();c.setFirstDayOfWeek(FIRST_DAY_OF_WEEK);c.setMinimalDaysInFirstWeek(MINIMAL_DAYS_IN_FIRST_WEEK);c.setTime(date);c.set(Calendar.DAY_OF_MONTH, 1);return c.getTime();}/** * 获取当前日期所在月份的最后一天 * * @param date * @return */public static Date getLastDayOfMonth(Date date) {Calendar c = Calendar.getInstance();c.setFirstDayOfWeek(FIRST_DAY_OF_WEEK);c.setMinimalDaysInFirstWeek(MINIMAL_DAYS_IN_FIRST_WEEK);c.setTime(date);c.set(Calendar.DAY_OF_MONTH, 1);//日期置1c.add(Calendar.MONTH, 1);//月份向前添加一个月c.add(Calendar.DAY_OF_MONTH, -1);//日期-1return c.getTime();}/** * 获取当前日期所在月份的最后一天 * * @param date * @return */public static long getDaysOfTwoDate(Date start, Date end) {Calendar c = Calendar.getInstance();Calendar temp = Calendar.getInstance();//取年月日c.setTime(start);temp.clear();temp.set(c.get(Calendar.YEAR), c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH));start = temp.getTime();System.out.println(start);//取年月日c.setTime(end);temp.clear();temp.set(c.get(Calendar.YEAR), c.get(Calendar.MONTH), c.get(Calendar.DAY_OF_MONTH));end = temp.getTime();System.out.println(end);long time = (end.getTime() - start.getTime()) / (24 * 60 * 60 * 1000);return time + 1;}public static int getYear(Date date) {Calendar c = Calendar.getInstance();c.setTime(date);int year = c.get(Calendar.YEAR);return year;}public static int getMothOfYear(Date date) {Calendar c = Calendar.getInstance();c.setTime(date);int month = c.get(Calendar.MONTH);return month+1;}public static int getHalfOfYear(Date date) {Calendar c = Calendar.getInstance();c.setTime(date);int month = c.get(Calendar.MONTH);return month <= 5 ? 1 : 2;}public static int getQuarterOfYear(Date date) {Calendar c = Calendar.getInstance();c.setTime(date);int month = c.get(Calendar.MONTH);switch (month) {case 0:case 1:case 2:return 1;case 3:case 4:case 5:return 2;case 6:case 7:case 8:return 3;case 9:case 10:case 11:return 4;default:throw new LogicalException("不可能存在其它的月份值");}}public static int getQuarterOfYear2(Date date) {Calendar c = Calendar.getInstance();c.setTime(date);int month = c.get(Calendar.MONTH);return month / 3 + 1;}public static void main(String[] args) {Date start = new Date();Date end1 = new Date(start.getTime() + 60 * 60 * 1000);Date end2 = new Date(start.getTime() + 7 * 60 * 60 * 1000);Date end3 = new Date(start.getTime() + 8 * 60 * 60 * 1000);Date end4 = new Date(start.getTime() + 20 * 60 * 60 * 1000);Date end5 = new Date(start.getTime() + 24 * 60 * 60 * 1000);System.out.println(getDaysOfTwoDate(start, end1));System.out.println(getDaysOfTwoDate(start, end2));System.out.println(getDaysOfTwoDate(start, end3));System.out.println(getDaysOfTwoDate(start, end4));System.out.println(getDaysOfTwoDate(start, end5));}}?