JAVA对日期格式的操作.doc

package net.airepay.app.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;public class DateUtil extends com.airepay.framework.util.DateUtil/* * 指定格式的日期，得到下一日期 * param Format yyyyMMdd * param dateStr * return * throws ParseException */public static String nextDateFromat(String Format,String dateStr) throws ParseExceptionSimpleDateFormat format = new SimpleDateFormat(Format);format.setLenient(false);Date d = format.parse(dateStr);Calendar calendar = new GregorianCalendar(); calendar.setTime(d); calendar.add(Calendar.DATE,1); return format.format(calendar.getTime().trim();/* * 指定格式的日期，得到上一日期 * param Format yyyyMMdd * param dateStr * return * throws ParseException */public static String proveDateFromat(String Format,String dateStr) throws ParseExceptionSimpleDateFormat format = new SimpleDateFormat(Format);format.setLenient(false);Date d = format.parse(dateStr);Calendar calendar = new GregorianCalendar(); calendar.setTime(d); calendar.add(Calendar.DATE,-1); return format.format(calendar.getTime().trim();/* * 返回时间差 * param Format 输入时间格式 * param dateStr 输入时间 * param targetFormat 目标格式 * param caltime 差值 * return * throws ParseException */public static String getDateFromat(String Format,String dateStr,String targetFormat,int caltime) throws ParseExceptionSimpleDateFormat format = new SimpleDateFormat(Format);SimpleDateFormat tgFormat = new SimpleDateFormat(targetFormat);format.setLenient(false);Date d = format.parse(dateStr);Calendar calendar = new GregorianCalendar(); calendar.setTime(d); calendar.add(Calendar.DATE,caltime); return tgFormat.format(calendar.getTime().trim();/* * 返回月份差 * param Format 输入时间格式 * param dateStr 输入时间 * param targetFormat 目标格式 * param caltime 差值 * return * throws ParseException */public static String getMonthFromat(String Format,String dateStr,String targetFormat,int caltime) throws ParseExceptionSimpleDateFormat format = new SimpleDateFormat(Format);SimpleDateFormat tgFormat = new SimpleDateFormat(targetFormat);format.setLenient(false);Date d = format.parse(dateStr);Calendar calendar = new GregorianCalendar(); calendar.setTime(d); calendar.add(Calendar.MONTH,caltime); return tgFormat.format(calendar.getTime().trim();/* * 给定日期时不时符合格式 * param Format yyyyMMdd * param dateStr * return * throws ParseException */public static boolean isDateFormat(String Format,String dateStr)try SimpleDateFormat format = new SimpleDateFormat(Format);format.setLenient(false);Date d = format.parse(dateStr);System.out.println(d);return false; catch (ParseException e) e.printStackTrace();return true;/* * 比较时间大小， * param bigDate * param smallDate * return */public static boolean isCompared(String format,String bigDate,String smallDate)tryjava.text.DateFormat df=new java.text.SimpleDateFormat(format); df.setLenient(false); java.util.Calendar c1=java.util.Calendar.getInstance(); java.util.Calendar c2=java.util.Calendar.getInstance(); c1.setTime(df.parse(bigDate); c2.setTime(df.parse(smallDate); int result=pareTo(c2); if(result=0) / System.out.println(c1相等c2); return true; else if(result= 0) formatType = yyyy.MM.dd; tempInputDate = strInputDate; if (strInputDate.indexOf(.) = 0) formatType = yyyy.MM.dd; if (tempInputDate.indexOf(:) = 0) /判断是哪种格式. formatType = formatType + hh:mm; tempInputDate = tempInputDate.substring(tempInputDate.indexOf(:) + 1); if (tempInputDate.indexOf(:) = 0) formatType = formatType + :ss; java.text.SimpleDateFormat formatter = new java.text.SimpleDateFormat(formatType); java.text.ParsePosition pos = new java.text.ParsePosition(0); java.util.Date sourceDate = formatter.parse(strInputDate, pos); GregorianCalendar gc = new GregorianCalendar(); gc.setTime(sourceDate); return gc; /输入字符串取星期 public String getDAY_OF_WEEK1(String date) GregorianCalendar gc = StringToGCalendar(date); int weekday = gc.get(Calendar.DAY_OF_WEEK) - 1; if (weekday = 0) weekday = 7; String ret = ; switch (weekday) case 1 : ret = 一; break; case 2 : ret = 二; break; case 3 : ret = 三; break; case 4 : ret = 四; break; case 5 : ret = 五 ; break; case 6 : ret = 六 ; break; case 7 : ret = 日 ; break; return ret; /* * 当前时间加上min分中后的时间 * param min * return */ public static Date addMinTime(Date date,int min) Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.add(Calendar.MINUTE, min); return cal.getTime(); /* * 当前时间加上-min分中后的时间 * param min 0整数 * return */ public static Date subTractMinTime(Date date,int min) Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.add(Calendar.MINUTE, min); return cal.getTime(); /* * 当前时间加上yrear分中后的时间 * param min * return */ public static Date addYearTime(Date date,int yrear) Calendar cal = Calendar.getInstance(); cal.setTime(date); cal.add(Calendar.YEAR, yrear); return cal.getTime(); public static void main(String arg)System.out.println(getWeekday(2010-11-30);System.out.println(getDateStr(20101130,yyyyMMdd,yyyy-MM-dd);try System.out.println(getDateFromat(yyyyMMdd,20100228,yyyy-MM,-1);System.out.println(_+addMinTime(new Date(),10);System.out.println(_+_:+isCompared(yyyy-MM-dd HH:mm:ss,2011-02-02 20:08:02,2011-02-02 20:06:02);System.out