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();
  }

 }
}