package com.my.util; import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import org.apache.commons.lang.StringUtils; /** * 说明:日期工具类 * @version 1.0 */ public class DateUtils { /** * @param yyyy-MM-dd * @return */ public static final String patternA = "yyyy-MM-dd"; /** * @param yyyyMMdd * @return */ public static final String patternB = "yyyyMMdd"; /** * @param yyyy-MM-dd HH-mm-ss * @return */ public static final String patternC = "yyyy-MM-dd HH-mm-ss"; /** * @param yyyy:MM:dd HH:mm:ss * @return */ public static final String patternD = "yyyy-MM-dd HH:mm:ss"; /** * @param yyyy-MM-dd HH:mm:ss * @return */ public static final String patternE = "yyyy-MM-dd HH:mm"; /** * @param yyyyMMddHHmmss * @return */ public static final String patternF = "yyyyMMddHHmmss"; public static final String patternG = "yyyy年MM月dd日"; /** * @param yyyy-MM * @return */ public static final String patternH = "yyyy-MM"; public static final String patternI = "yyyyMM"; /** * 格式化日期为yyyy-MM-dd * @param date * @return */ public static String formateDate(Date date){ return dateToString(date,patternA); } /** * 格式化日期为yyyy-MM * @param date * @return */ public static String formateYearAndMonth(Date date){ return dateToString(date,patternH); } /** * @param 取当天日期 * @return */ public static Date getDate() { return Calendar.getInstance().getTime(); } /** * @param 取指定年月日的日期,格式为yyyy-MM-dd,HH-mm-ss 00-00-00 * @return */ public static Date getDate(int year, int month, int day) { Calendar cal = Calendar.getInstance(); cal.set(year, month-1, day,0,0,0); return cal.getTime(); } /** * @param 取指定年,月,日,小时,分,秒的时间 * @return */ public static Date getDate(int year,int month,int date,int hour,int mintue,int second) { Calendar cal=Calendar.getInstance(); cal.set(Calendar.YEAR,year); cal.set(Calendar.MONTH,month-1); cal.set(Calendar.DATE,date); cal.set(Calendar.HOUR_OF_DAY,hour); cal.set(Calendar.MINUTE,mintue); cal.set(Calendar.SECOND,second); return cal.getTime(); } /** * @param days=n n为-,则取n天前,n为+,则取n天后的日期 * @param date * @param days * @return */ public static Date getSomeDaysBeforeAfter(Date date, int days){ GregorianCalendar gc =new GregorianCalendar(); gc.setTime(date); gc.add(5, days); gc.set(gc.get(Calendar.YEAR),gc.get(Calendar.MONTH),gc.get(Calendar.DATE)); return gc.getTime(); } /** * @param 取指定日期年份 * @return */ public static int getDateYear(Date date){ Calendar c = Calendar.getInstance(); c.setTime(date); return c.get(Calendar.YEAR); } /** * @param 取指定日期月份 * @return */ public static int getDateMonth(Date date){ Calendar c = Calendar.getInstance(); c.setTime(date); return c.get(Calendar.MONTH)+1; } /** * @param 取指定日期日份 * @return */ public static int getDateDay(Date date){ Calendar c = Calendar.getInstance(); c.setTime(date); return c.get(Calendar.DATE); } /** * @param 取指定日期小时 * @return */ public static int getDateHour(Date date){ Calendar c = Calendar.getInstance(); c.setTime(date); return c.get(Calendar.HOUR_OF_DAY); } /** * @param 取指定日期分钟 * @return */ public static int getDateMinute(Date date){ Calendar c = Calendar.getInstance(); c.setTime(date); return c.get(Calendar.MINUTE); } /** * @param 取指定日期的第二天的开始时间,小时,分,秒为00:00:00 * @return */ public static Date getNextDayStartTime(Date date) { Calendar c = Calendar.getInstance(); c.setTime(date); return getNextDayStart(c.get(Calendar.YEAR), c.get(Calendar.MONTH)+1, c.get(Calendar.DATE)); } /** * @param 取指定年,月,日的下一日的开始时间,小时,分,秒为00:00:00 * @param 主要是用来取跨月份的日期 * @return */ public static Date getNextDayStart(int year, int monthIn, int date) { int month = monthIn - 1; boolean lastDayOfMonth = false; boolean lastDayOfYear = false; Calendar time = Calendar.getInstance(); time.set(year, month, date, 0, 0, 0); Calendar nextMonthFirstDay = Calendar.getInstance(); nextMonthFirstDay.set(year, month + 1, 1, 0, 0, 0); if (time.get(Calendar.DAY_OF_YEAR) + 1 == nextMonthFirstDay.get(Calendar.DAY_OF_YEAR)) lastDayOfMonth = true; if (time.get(Calendar.DAY_OF_YEAR) == time.getMaximum(Calendar.DATE)) lastDayOfYear = true; time.roll(Calendar.DATE, 1); if (lastDayOfMonth) time.roll(Calendar.MONTH, 1); if (lastDayOfYear) time.roll(Calendar.YEAR, 1); return time.getTime(); } /** * @param 取指定日期的下一日的时间 * @return */ public static Date nextDate(Date date) { Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.add(Calendar.DATE,1); return cal.getTime(); } /** * @param 指定日期的下一日的开始时间,小时,分,秒为00:00:00 * @return */ public static Date getStartDateNext(Date date) { Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.add(Calendar.DATE,1); cal.set(Calendar.HOUR_OF_DAY,0); cal.set(Calendar.MINUTE,0); cal.set(Calendar.SECOND,0); return cal.getTime(); } /** * @param 指定日期的开始时间,小时,分,秒为00:00:00 * @return */ public static Date getStartDateDay(Date date) { if(date == null) return null; Calendar cal=Calendar.getInstance(); cal.setTime(date); cal.set(Calendar.HOUR_OF_DAY,0); cal.set(Calendar.MINUTE,0); cal.set(Calendar.SECOND,0); return cal.getTime(); } /** * @param 指定日期的结束时间,小时,分,秒为23:59:59 * @return */ public static Date getEndDateDay(Date date) { if(date == null) return null; Calendar cal=Calendar.getInstance(); cal.setTime(date); cal.set(Calendar.HOUR_OF_DAY,23); cal.set(Calendar.MINUTE,59); cal.set(Calendar.SECOND,59); return cal.getTime(); } /** * @param 将指定日期,以指定pattern格式,输出String值 * @return */ public static String dateToString(Date date ,String pattern) { if (date == null) { return ""; } else { SimpleDateFormat format = new SimpleDateFormat(pattern); return format.format(date); } } public static String dateToString1(Date date, String formatIn) { String format=formatIn; if (date == null) { return ""; } if (format == null) { format = patternD; } java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat(format); return sdf.format(date); } /** * @param 将指定年,月,日的日期转为字符型,格式为yyyy-MM-dd * @return */ public static String dateToString(int year, int month, int day, String pattern) { return dateToString(getDate(year, month, day), pattern); } /** * @param 将指定字符型日期转为日期型,,格式为指定的pattern * @return */ public static Date stringToDate(String string, String pattern){ SimpleDateFormat format = (SimpleDateFormat)DateFormat.getDateInstance(); format.applyPattern(pattern); try { return format.parse(string); } catch (ParseException e) { return null; } } /** * @param 将指定字符型日期转为日期型,指定格式为yyyy-MM-dd * @return */ public static Date stringToDate(String string){ return stringToDate(string, patternA); } /** * 获得两个日期之间间隔的天数 * @param startDate 起始年月日 * @param endDate 结束年月日 * @return int */ public static int getDays(Date startDate, Date endDate) { int elapsed = 0; Calendar cal = Calendar.getInstance(); cal.setTime(startDate); Date d1 = cal.getTime(); cal.setTime(endDate); Date d2 = cal.getTime(); long daterange = d2.getTime() - d1.getTime(); long time = 1000*3600*24; //一天的毫秒数 elapsed = (int) (daterange/time); return elapsed; } /** * @param date * @param startTime 格式为0800,表示上午8点00分 * @param endTime格式为2200 * @return */ public static boolean isWorkHour(Date date,String startTimeIn,String endTimeIn){//是否是工作时间 String startTime=startTimeIn; String endTime=endTimeIn; if(StringUtils.isEmpty(startTime)) startTime = "0800"; if(StringUtils.isEmpty(endTime)) endTime = "2200"; int start = Integer.parseInt(startTime); int end = Integer.parseInt(endTime); int hour = getDateHour(date); int m = getDateMinute(date); String hstr = hour<=9?"0"+hour:hour+""; String mstr = m<=9?"0"+m:m+""; int dateInt = Integer.parseInt(hstr+mstr); if(dateInt>=start&&dateInt<=end){ return true; } return false; } /** * @param 根据传入日期,返回此月有多少天 * @param date 格式为 201408 * @return */ public static int getDayOfMonth(String date){ int year = Integer.parseInt(date.substring(0, 3)); int month = Integer.parseInt(date.substring(date.length()-1, date.length())); Calendar cal = Calendar.getInstance(); cal.set(Calendar.YEAR,year); cal.set(Calendar.MONTH, month-1);//Java月份才0开始算 6代表上一个月7月 int dateOfMonth = cal.getActualMaximum(Calendar.DATE); return dateOfMonth; } /** * @param 取指定日期月份前一月 * @return */ public static int getLastDateMonth(Date date){ Calendar c = Calendar.getInstance(); c.setTime(date); return c.get(Calendar.MONTH); } //取日期的当前月第一天 public static Date getMonthFirstDay(Date date){ return getDate(getDateYear(date), getDateMonth(date), 1); } //前月第一天 public static Date getLastDateMonthDay(Date date){ return getDate(getDateYear(date), getLastDateMonth(date), 1); } }