时间处理函数工具分享(时间戳计算)

/**
 * 时间处理函数
 *
 * @20080509 15：50
 */
public class DateUtil {

 private static final String DEFAULT_PATTERN = "yyyy-MM-dd HH:mm:ss";

 public static final String TIME_YEAR = "yyyy";

 public static final String TIME_MOnEN= "MM";

 public static final String TIME_DAY = "dd";

 public static String getDate(String interval, Date starttime, String pattern) {
  Calendar temp = Calendar.getInstance(TimeZone.getDefault());
  temp.setTime(starttime);
  temp.add(temp.MONTH, Integer.parseInt(interval));
  SimpleDateFormat sdf = new SimpleDateFormat(pattern);
  return sdf.format(temp.getTime());
 }

 /**
  * 将字符串类型转换为时间类型
  *
  * @return
  */
 public static Date str2Date(String str) {
  Date d = null;
  SimpleDateFormat sdf = new SimpleDateFormat(DEFAULT_PATTERN);
  try {
   d = sdf.parse(str);
  } catch (Exception e) {
   e.printStackTrace();
  }
  return d;
 }

 public static Date str2Date(String str, String pattern) {
  Date d = null;
  SimpleDateFormat sdf = new SimpleDateFormat(pattern);
  try {
   d = sdf.parse(str);
  } catch (Exception e) {
   e.printStackTrace();
  }
  return d;
 }

 /**
  * 将时间格式化
  *
  * @return
  */
 public static Date DatePattern(Date date) {
  SimpleDateFormat sdf = new SimpleDateFormat(DEFAULT_PATTERN);
  try {
   String dd = sdf.format(date);
   date = str2Date(dd);
  } catch (Exception e) {
   e.printStackTrace();
  }
  return date;
 }

 /**
  * 将时间格式化
  */
 public static Date DatePattern(Date date, String pattern) {
  SimpleDateFormat sdf = new SimpleDateFormat(pattern);
  try {
   String dd = sdf.format(date);
   date = str2Date(dd, pattern);
  } catch (Exception e) {
   e.printStackTrace();
  }
  return date;
 }

 public static String date2Str(Date date) {
  SimpleDateFormat sdf = new SimpleDateFormat(DEFAULT_PATTERN);
  return sdf.format(date);
 }

 public static String date2Str(Date date, String format) {
  SimpleDateFormat sdf = new SimpleDateFormat(format);
  return sdf.format(date);
 }

 /**
  * 获取昨天
  *
  * @param date
  * @return
  * @throws Exception
  */
 public static Date getLastDate(Date date) {
  Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
  calendar.setTime(date);

  calendar.add(calendar.DATE, -1);

  return str2Date(date2Str(calendar.getTime()));
 }
 /**
  * 获取前几天
  * @param date
  * @return
  */
 public static Date getBeforeDate(Date date,int dates) {
  Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
  calendar.setTime(date);

  calendar.add(calendar.DATE, -dates);

  return str2Date(date2Str(calendar.getTime()));
 }

 /**
  * 获取上周第一天（周一）
  *
  * @param date
  * @return
  * @throws Exception
  */
 public static Date getLastWeekStart(Date date) {
  Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
  calendar.setTime(date);
  int i = calendar.get(calendar.DAY_OF_WEEK) - 1;
  int startnum = 0;
  if (i == 0) {
   startnum = 7 + 6;
  } else {
   startnum = 7 + i - 1;
  }
  calendar.add(calendar.DATE, -startnum);

  return str2Date(date2Str(calendar.getTime()));
 }

 /**
  * 获取上周最后一天（周末）
  *
  * @param date
  * @return
  * @throws Exception
  */
 public static Date getLastWeekEnd(Date date) {
  Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
  calendar.setTime(date);
  int i = calendar.get(calendar.DAY_OF_WEEK) - 1;
  int endnum = 0;
  if (i == 0) {
   endnum = 7;
  } else {
   endnum = i;
  }
  calendar.add(calendar.DATE, -(endnum - 1));

  return str2Date(date2Str(calendar.getTime()));
 }

 /**
  * 根据年和月得到天数
  * @param num 月
  * @param year 年
  * @return
  */
 public static int getday(int num,int year){
  if(num==1 || num==3 || num==5 || num==7 || num==8 || num==10 || num==12){
   return 31;
  }else if(num==2){
   //判断是否为闰年
   if(year%400==0 || (year%4==0 && year%100!=0)){
    return 29;
   }else{
    return 28;
   }

  }else{
   return 30;
  }
 }
 /*
  * 计算当前日期距离下个月还有多少天
  */
 public static int getdaymis(Date time){
  int year = Integer.parseInt(
    new SimpleDateFormat(TIME_YEAR).format(time));//年

  int mm = Integer.parseInt(
    new SimpleDateFormat(TIME_MONEN).format(time));//月

  int dd = Integer.parseInt(
    new SimpleDateFormat(TIME_DAY).format(time));//日

  
  //获取当前年月的总天数
  int sdd = getday(mm,year);

  return sdd-dd;

  
 }
 /**
  * 日期转秒数
  * @param dateString
  * @return
  */
 public static long getTime(String dateString) {
     long time = 0;
     try {
      Date ret = null;
      SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
      ret = sdf.parse(dateString);
      time = ret.getTime()/1000;
     } catch (Exception e) {

     }
     return time;
    }

 
 /**
  * 精确计算时间差，精确到日
  * @param fistill 起始日期
  * @param nowtime 结束日期
  * @param type type为1返回年月日（如：2年3个月零5天） 否则返回总的天数
  * @return
  */
 public static String patienage(Date fistill,Date nowtime,Integer type){

  int fyear = Integer.parseInt(
    new SimpleDateFormat(TIME_YEAR).format(fistill));//起始年

  int fmm = Integer.parseInt(
    new SimpleDateFormat(TIME_MONEN).format(fistill));//起始月

  int fdd = Integer.parseInt(
    new SimpleDateFormat(TIME_DAY).format(fistill));//起始日

  
  int nyear = Integer.parseInt(
    new SimpleDateFormat(TIME_YEAR).format(nowtime));//结束年

  int nmm = Integer.parseInt(
    new SimpleDateFormat(TIME_MONEN).format(nowtime));//结束月

  int ndd = Integer.parseInt(
    new SimpleDateFormat(TIME_DAY).format(nowtime));//结束日

  int cyear = nyear - fyear;
  int cmm = nmm - fmm;
  int cdd = ndd - fdd;

  
  int zyear = 0;
  int zmm = 0;
  int zdd = 0;

  int countddd = 0;  //年月日累计天数

  if(cdd<0){
   if(cmm<0){
    zyear = cyear - 1;
    zmm = (cmm + 12)-1;
    int dd = getday(zmm,nyear-1);
    zdd = dd + cdd;

    
    countddd = zyear*365+zmm*30+zdd;

   }else if(cmm==0){
    zyear = cyear - 1;
    zmm = 12-1;
    int dd = getday(zmm,nyear-1);
    zdd = dd + cdd;

    countddd = zyear*365+zmm*30+zdd;

   }else{
    zyear = cyear;
    zmm = cmm - 1;
    int dd = getday(zmm,nyear);
    zdd = dd + cdd;

    countddd = zyear*365+zmm*30+zdd;

   }
  }else if(cdd==0){
   if(cmm<0){
    zyear = cyear - 1;
    zmm = cmm + 12;
    zdd = 0;

    countddd = zyear*365+zmm*30;

   }else if(cmm==0){
    zyear = cyear;
    zmm = 0;
    zdd = 0;

    countddd = zyear*365+zmm*30;

   }else{
    zyear = cyear;
    zmm = cmm;
    zdd = 0;

    countddd = zyear*365+zmm*30;
   }
  }else{
   if(cmm<0){
    zyear = cyear - 1;
    zmm = cmm + 12;
    zdd = cdd;

    countddd = zyear*365+zmm*30+zdd;
   }else if(cmm==0){
    zyear = cyear;
    zmm = 0;
    zdd = cdd;

    countddd = zyear*365+zmm*30+zdd;
   }else{
    zyear = cyear;
    zmm = cmm;
    zdd = cdd;

    countddd = zyear*365+zmm*30+zdd;
   }
  }
  String ptime = null;

  if(zdd!=0){
   if(zmm!=0){
    if(zyear!=0){
     ptime = zyear+"年"+zmm+"个月"+"零"+zdd+"天";
    }else{
     ptime = zmm+"个月"+"零"+zdd+"天";
    }
   }else{
    if(zyear!=0){
     ptime = zyear+"年"+"零"+zdd+"天";
    }else{
     ptime = zdd+"天";
    }
   }
  }else{
   if(zmm!=0){
    if(zyear!=0){
     ptime = zyear+"年"+zmm+"个月";
    }else{
     ptime = zmm+"个月";
    }
   }else{
    if(zyear!=0){
     ptime = zyear+"年";
    }else{
     ptime = null;
    }
   }
  }
  if(type==1){
   return ptime;   //返回年月日（如：2年3个月零5天）
  }else{
   return String.valueOf(countddd);  //返回总天数
  }

  
 }
 /**
  * 得到月数
  * @param year 年数差
  * @param month 月数差
  * @return
  */
 public static int getCmm(Integer year,Integer month){
  int zmm = 0;
  if(month <0){
   zmm = (month + 12)+(year-1)*12;
  }else if(mOnth== 0){
   zmm = year*12;
  }else{
   zmm = year*12+month;
  }
  return zmm;
 }

 

 /**
  * 改更现在时间
  */
 public static Date changeDate(String type, int value) {
  Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
  if (type.equals("month")) {
   calendar.set(Calendar.MONTH, calendar.get(Calendar.MONTH) + value);
  } else if (type.equals("date")) {
   calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) + value);
  }
  return calendar.getTime();
 }

 /**
  * 更改时间
  */
 public static Date changeDate(Date date, String type, int value) {
  if (date != null) {
   // Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
   Calendar calendar = new GregorianCalendar();
   calendar.setTime(date);
   // Calendar calendar = Calendar.
   if (type.equals("month")) {
    calendar.set(Calendar.MONTH, calendar.get(Calendar.MONTH) + value);
   } else if (type.equals("date")) {
    calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) + value);
   } else if (type.endsWith("year")) {
    calendar.set(Calendar.YEAR, calendar.get(Calendar.YEAR) + value);
   }
   return calendar.getTime();
  }
  return null;
 }

 /**
  * haoxw 比较时间是否在这两个时间点之间
  *
  * @param time1
  * @param time2
  * @return
  */
 public static boolean checkTime(String time1, String time2) {
  Calendar calendar = Calendar.getInstance();
  Date date1 = calendar.getTime();
  Date date11 = DateUtil.str2Date(DateUtil.date2Str(date1, "yyyy-MM-dd") + " " + time1);// 起始时间

  Calendar c = Calendar.getInstance();
  c.add(Calendar.DATE, 1);
  Date date2 = c.getTime();
  Date date22 = DateUtil.str2Date(DateUtil.date2Str(date2, "yyyy-MM-dd") + " " + time2);// 终止时间

  Calendar scalendar = Calendar.getInstance();
  scalendar.setTime(date11);// 起始时间

  Calendar ecalendar = Calendar.getInstance();
  ecalendar.setTime(date22);// 终止时间

  Calendar calendarnow = Calendar.getInstance();

  if (calendarnow.after(scalendar) && calendarnow.before(ecalendar)) {
   return true;
  } else {
   return false;
  }

 }

 /**
  * haoxw 比较时间是否在这两个时间点之间
  *
  * @param date11
  * @param date22
  * @return
  */
 public static boolean checkTime(Date date11, Date date22) {

  

  Calendar scalendar = Calendar.getInstance();
  scalendar.setTime(date11);// 起始时间

  Calendar ecalendar = Calendar.getInstance();
  ecalendar.setTime(date22);// 终止时间

  Calendar calendarnow = Calendar.getInstance();

  if (calendarnow.after(scalendar) && calendarnow.before(ecalendar)) {
   return true;
  } else {
   return false;
  }

 }

 public static boolean checkDate(String date1, String date2) {

  Date date11 = DateUtil.str2Date(date1, "yyyy-MM-dd HH:mm:ss");// 起始时间

  Date date22 = DateUtil.str2Date(date2, "yyyy-MM-dd HH:mm:ss");// 终止时间

  Calendar scalendar = Calendar.getInstance();
  scalendar.setTime(date11);// 起始时间

  Calendar ecalendar = Calendar.getInstance();
  ecalendar.setTime(date22);// 终止时间

  Calendar calendarnow = Calendar.getInstance();

  System.out.println(date11.toString());
  System.out.println(date22.toString());
  System.out.println(scalendar.toString());
  System.out.println(ecalendar.toString());
  System.out.println(calendarnow.toString());

  if (calendarnow.after(scalendar) && calendarnow.before(ecalendar)) {
   return true;
  } else {
   return false;
  }
 }

 /**
  * 获取interval天之前的日期
  *
  * @param interval
  * @param starttime
  * @param pattern
  * @return
  */
 public static Date getIntervalDate(String interval, Date starttime, String pattern) {
  Calendar temp = Calendar.getInstance();
  temp.setTime(starttime);
  temp.add(temp.DATE, Integer.parseInt(interval));
  SimpleDateFormat sdf = new SimpleDateFormat(pattern);
  String shijian = sdf.format(temp.getTime());
  return str2Date(shijian);
 }

 public static Date formatDate(Date date){
  SimpleDateFormat bartDateFormat =
  new SimpleDateFormat("yyyy-MM-dd");   
  System.out.println(bartDateFormat.format(date));
  SimpleDateFormat bartDateFormat1 =new SimpleDateFormat("yyyy-MM-dd");    
  try {
   Date date1 = bartDateFormat1.parse(bartDateFormat.format(date));
  } catch (ParseException e) {    
   e.printStackTrace();
  }
  System.out.println(date.getTime());
  return date;

 }

 public static void main(String arf[]) {

  /*String time1 = "2009-05-07 19:20:00";
  String time2 = "2009-05-08 19:30:00";

  DateUtil d = new DateUtil();
  System.out.println(d.checkDate(time1, time2));
  System.out.println(d.date2Str(new Date()));*/

  //System.out.println(d.getIntervalDate("-3", new Date(), DEFAULT_PATTERN));
  Calendar calendar = Calendar.getInstance(TimeZone.getDefault());
  System.out.println(calendar.toString());
  System.out.println(DateUtil.str2Date("20090731","yyyyMMdd"));

  System.out.println(DateUtil.getBeforeDate(new Date(),2 ));
  System.out.println(DateUtil.DatePattern(new Date()));

     SimpleDateFormat bartDateFormat =
  new SimpleDateFormat("yyyy-MM-dd");
  Date date = new Date();
  System.out.println("date;"+bartDateFormat.format(date));
  SimpleDateFormat bartDateFormat1 =new SimpleDateFormat("yyyy-MM-dd");    
  try {
   Date date1 = bartDateFormat1.parse(bartDateFormat.format(date));
   System.out.println("日期："+date1);
  } catch (ParseException e) {    
   e.printStackTrace();
  }

 }
}