日期工具
package yabushan.DateUtils;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.GregorianCalendar;import org.apache.log4j.Logger;/** * * {@link DateUtils} * * TODO : document me * * @author yabushan * @date 2016-1-1 */public abstract class DateUtils{ static Logger logger = Logger.getLogger(DateUtils.class.getName()); public static String YYYY_MM_DD_HH_MM_SS="yyyy-MM-dd HH:mm:ss"; public static void main(String[] args) { System.out.println(getCurrentDate());//获取当前日期 System.out.println(formatDatatoString(new Date(),1)); System.out.println(formatDatatoString(new Date(),2)); System.out.println(formatDatatoString(new Date(),3)); } /** * 获取当前日期 * @return */ public static Date getCurrentDate() { Calendar now = Calendar.getInstance(); return now.getTime(); } public static Date parseDate(String date, String... pattern) throws ParseException { return DateUtils.parseDate(date, pattern); } public static Date[] getDateRangeOfMonth(int year, int month) { month = month - 1; Calendar rightNow = Calendar.getInstance(); rightNow.set(year, month, 1, 0, 0, 0); Date startDate = rightNow.getTime(); rightNow.set(year, month + 1, 1, 0, 0, -1); Date endDate = rightNow.getTime(); return new Date[] { formatDate(startDate), formatDate(endDate) }; } public static int[] getNowSingleObject() { Calendar rightNow = Calendar.getInstance(); return new int[] { rightNow.get(Calendar.DAY_OF_MONTH), rightNow.get(Calendar.MONTH) + 1, rightNow.get(Calendar.YEAR) }; } public static String getNowM() { SimpleDateFormat bartDateFormat = new SimpleDateFormat( "yyyy-MM-dd HH:mm"); Date now = new Date(); String str = bartDateFormat.format(now).toString(); return str; } public static Date formatDate(Date date) { SimpleDateFormat bartDateFormat = new SimpleDateFormat("yyyy-MM-dd"); Date convert = null; try { convert = bartDateFormat.parse(bartDateFormat.format(date)); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } return convert; } public static Date formatDate(Date date, int i) { SimpleDateFormat bartDateFormat = new SimpleDateFormat("yyyy-MM-dd"); if (i == 1) { bartDateFormat = new SimpleDateFormat("yyyy-MM-dd"); } else if (i == 2) { bartDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm"); }else if (i == 3) { bartDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); } Date convert = null; try { convert = bartDateFormat.parse(bartDateFormat.format(date)); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } return convert; } public static Date getDate(java.sql.Timestamp timestamp) { Calendar c = new GregorianCalendar(); c.setTimeInMillis(timestamp.getTime()); return c.getTime(); } /** * @param date * 需要格式化的日期 * @param i * 1：yyyy-MM-dd 2：yyyy-MM-dd HH:mm 3:HH:mm else:yyyy-MM-dd * @return 规定格式的字符串 */ public static String formatDatatoString(Date date, int i) { String result = ""; SimpleDateFormat bartDateFormat = new SimpleDateFormat("yyyy-MM-dd"); if (date == null) return ""; if (i == 1) { bartDateFormat = new SimpleDateFormat("yyyy-MM-dd"); } else if (i == 2) { bartDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm"); } else if (i == 3) { bartDateFormat = new SimpleDateFormat("HH:mm"); } else if (i == 4) { bartDateFormat = new SimpleDateFormat("MM-dd HH:mm"); } else if (i == 5) { bartDateFormat = new SimpleDateFormat("MM-dd HH:mm:ss"); } else if (i == 6) { bartDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); } else if (i == 7) { bartDateFormat = new SimpleDateFormat("yyyyMMddHHmmss"); } else if (i == 8) { bartDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss,SSS"); }else if(i ==9){ bartDateFormat = new SimpleDateFormat("yyyyMMddHHmmssSSS"); }else if(i ==10){ bartDateFormat = new SimpleDateFormat("yyyyMMddHHmm"); }else if(i ==11){ bartDateFormat = new SimpleDateFormat("yyyyMMdd"); } else if (i == 12) { bartDateFormat = new SimpleDateFormat("HH:mm:ss"); } result = bartDateFormat.format(date).toString(); return result; } /** * 将字符串格式化成日期 * * @param date * @return */ public static Date formatDate(String date) { SimpleDateFormat bartDateFormat = new SimpleDateFormat("yyyy-MM-dd"); Date convert = null; try { convert = bartDateFormat.parse(date); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } return convert; } public static Date formatDate(String date,String format) { SimpleDateFormat bartDateFormat = new SimpleDateFormat(format); Date convert = null; try { convert = bartDateFormat.parse(date); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } return convert; } public static Date formatDate(String date, int i) { SimpleDateFormat bartDateFormat = new SimpleDateFormat("yyyy-MM-dd"); if (i == 1) { bartDateFormat = new SimpleDateFormat("yyyy-MM-dd"); } else if (i == 2) { bartDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm"); } else if (i == 3) { bartDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); } else if (i == 4) { bartDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss,SSS"); } else if (i == 5) { bartDateFormat = new SimpleDateFormat("HH:mm:ss"); }else if(i ==6){ bartDateFormat = new SimpleDateFormat("yyyyMMddHHmmss"); } Date convert = null; try { convert = bartDateFormat.parse(date); } catch (ParseException e) { logger.warn(e.getMessage()); } return convert; } public static boolean isSameDay(Date date1, Date date2, int i) { String s1 = formatDatatoString(date1, i); String s2 = formatDatatoString(date2, i); return s1.equalsIgnoreCase(s2); } public static boolean isToday(Date date1, int i) { Calendar today = Calendar.getInstance(); return isSameDay(today.getTime(), date1, i); } public static Long formatDateToLong(Date date) { if (date != null) { Calendar now = Calendar.getInstance(); now.setTime(date); return now.getTimeInMillis(); } else { return 0L; } } public static Date formatLongToDate(Long millis) { Calendar now = Calendar.getInstance(); now.setTimeInMillis(millis); return now.getTime(); } /** * * @param longTime * @return */ public static String getTimeStr(Long longTime) { String result = "00:00:00"; try { int hour = (longTime.intValue() / 3600) % 24; int minite = (longTime.intValue() / 60) % 60; int second = (longTime.intValue() % 60); String hourStr = hour < 10 ? ("0" + hour) : hour + ""; String miniteStr = minite < 10 ? ("0" + minite) : minite + ""; String secondStr = second < 10 ? ("0" + second) : second + ""; result = hourStr + ":" + miniteStr + ":" + secondStr; } catch (Exception e) { logger.error("", e); } return result; }/** * * @param strTime * @return */ public static Long getStrLongTime(String strTime) { Long result = 0L; String[] strs = strTime.split(":"); try { int hour = Integer.parseInt(strs[0]); int minite = Integer.parseInt(strs[1]); int second = Integer.parseInt(strs[2]); result = Long.valueOf((hour * 60 * 60) + (minite * 60) + second); } catch (Exception e) { logger.error("", e); } return result; } /** * 将 java.util.Date 对象转换为 java.sql.Timestamp 对象。 * * @param date * java.util.Date对象 * @return java.sql.Timestamp对象，如果参数为 null 则返回 null。 */ public static java.sql.Timestamp toSqlTimestamp(java.util.Date date) { if (date == null) { return null; } return new java.sql.Timestamp(date.getTime()); } /** * @data:2015-01-09 * @param date * @param day * @return * 日期增加指定天数 */ public static Date addDay(Date date,int day){ Calendar cal=Calendar.getInstance(); cal.setTime(date); cal.add(Calendar.DAY_OF_YEAR,day); return cal.getTime(); }}