java时间戳与日期相互转换工具详解

package com.crm.util;  import java.math.BigDecimal; import java.text.DecimalFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date;    public class DateFormatUtil {         public static Date transForDate(Integer ms){     if(ms==null){       ms=0;     }     long msl=(long)ms*1000;     SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");     Date temp=null;     if(ms!=null){       try {         String str=sdf.format(msl);         temp=sdf.parse(str);       } catch (ParseException e) {         e.printStackTrace();       }     }     return temp;   }         public static int getTimes(int day, int hour, int minute) {     Calendar cal = Calendar.getInstance();     cal.add(Calendar.DATE, day);     cal.set(Calendar.HOUR_OF_DAY, hour);     cal.set(Calendar.SECOND, 0);     cal.set(Calendar.MINUTE, minute);     cal.set(Calendar.MILLISECOND, 0);     return (int) (cal.getTimeInMillis() / 1000);   }         public static int getIntegralTime() {     Calendar cal = Calendar.getInstance();     cal.add(Calendar.HOUR_OF_DAY, 1);     cal.set(Calendar.SECOND, 0);     cal.set(Calendar.MINUTE, 0);     cal.set(Calendar.MILLISECOND, 0);     return (int) (cal.getTimeInMillis() / 1000);   }      public static int getIntegralTimeEnd() {     Calendar cal = Calendar.getInstance();     cal.set(Calendar.HOUR_OF_DAY, 24);     cal.set(Calendar.SECOND, 0);     cal.set(Calendar.MINUTE, 0);     cal.set(Calendar.MILLISECOND, 0);     return (int) (cal.getTimeInMillis() / 1000);   }         public static Date transForDate3(Integer ms){     if(ms==null){       ms=0;     }     long msl=(long)ms*1000;     SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm");     Date temp=null;     if(ms!=null){       try {         String str=sdf.format(msl);         temp=sdf.parse(str);       } catch (ParseException e) {         e.printStackTrace();       }     }     return temp;   }      public static Date transForDate(Long ms){     if(ms==null){       ms=(long)0;     }     long msl=(long)ms*1000;     SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");     Date temp=null;     if(ms!=null){       try {         String str=sdf.format(msl);         temp=sdf.parse(str);       } catch (ParseException e) {         e.printStackTrace();       }     }     return temp;   }         public static String transForDate1(Integer ms){     String str = "";     if(ms!=null){       long msl=(long)ms*1000;       SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");              if(ms!=null){         try {           str=sdf.format(msl);         } catch (Exception e) {           e.printStackTrace();         }       }     }         return str;   }   public static String transForDate2(Integer ms){     String str = "";     if(ms!=null){       long msl=(long)ms*1000;       SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");              if(ms!=null){         try {           str=sdf.format(msl);         } catch (Exception e) {           e.printStackTrace();         }       }     }         return str;   }      public static String transForDate4(Integer ms){     String str = "";     if(ms!=null){       long msl=(long)ms*1000;       SimpleDateFormat sdf=new SimpleDateFormat("yyyy.MM.dd");              if(ms!=null){         try {           str=sdf.format(msl);         } catch (Exception e) {           e.printStackTrace();         }       }     }         return str;   }         public static String transForDate5(Integer ms){     String str = "";     if(ms!=null){       long msl=(long)ms*1000;       SimpleDateFormat sdf=new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");              if(ms!=null){         try {           str=sdf.format(msl);         } catch (Exception e) {           e.printStackTrace();         }       }     }         return str;   }      public static String transForDateInChinese(Integer ms){     String str = "";     if(ms!=null){       long msl=(long)ms*1000;       SimpleDateFormat sdf=new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");              if(ms!=null){         try {           str=sdf.format(msl);         } catch (Exception e) {           e.printStackTrace();         }       }     }         return str;   }         public static Integer transForMilliSecond(Date date){     if(date==null) return null;     return (int)(date.getTime()/1000);   }         public static Integer currentTimeStamp(){     return (int)(System.currentTimeMillis()/1000);   }         public static Integer transForMilliSecond(String dateStr){     Date date = DateFormatUtil.formatDate(dateStr);     return date == null ? null : DateFormatUtil.transForMilliSecond(date);   }      public static Integer transForMilliSecond(String dateStr,String format){     Date date = DateFormatUtil.formatDate(dateStr,format);     return date == null ? null : DateFormatUtil.transForMilliSecond(date);   }      public static Integer transForMilliSecondByTim(String dateStr,String tim){     SimpleDateFormat sdf=new SimpleDateFormat(tim);     Date date =null;     try {       date = sdf.parse(dateStr);     } catch (ParseException e) {       e.printStackTrace();     }     return date == null ? null : DateFormatUtil.transForMilliSecond(date);   }      public static Date formatDate(String dateStr){     SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");     Date result=null;     try {       result = sdf.parse(dateStr);     } catch (ParseException e) {       e.printStackTrace();     }     return result;   }      public static Date formatDate(String dateStr,String format){     SimpleDateFormat sdf=new SimpleDateFormat(format);     Date result=null;     try {       result = sdf.parse(dateStr);     } catch (ParseException e) {       e.printStackTrace();     }     return result;   }      public static String formatDate(Date date){     SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");     String result=null;     result = sdf.format(date);     return result;   }      public static String formatDate(Date date,String format){     SimpleDateFormat sdf=new SimpleDateFormat(format);     String result=null;     result = sdf.format(date);     return result;   }      public static String transForDate(Integer ms, String format){     String str = "";     if(ms!=null){       long msl=(long)ms*1000;       SimpleDateFormat sdf=new SimpleDateFormat(format);       if(!ms.equals(0)){         try {           str=sdf.format(msl);         } catch (Exception e) {           e.printStackTrace();         }       }     }     return str;   }           public static String splitBigDecimal(BigDecimal b, int mode) {     DecimalFormat df = new DecimalFormat("0.00");     String s = df.format(b);     if(mode==0){       return s.split("\\.")[0];     }else {       return "."+s.split("\\.")[1];     }   }         public static int caculate2Days(Integer ts1, Integer ts2) {     Date firstDate = DateFormatUtil.transForDate(ts1);     Date secondDate = DateFormatUtil.transForDate(ts2);     Calendar calendar = Calendar.getInstance();     calendar.setTime(firstDate);     int dayNum1 = calendar.get(Calendar.DAY_OF_YEAR);     calendar.setTime(secondDate);     int dayNum2 = calendar.get(Calendar.DAY_OF_YEAR);     return Math.abs(dayNum1 - dayNum2);   }         public String mobileSerect(String mobile){     if(!StringUtils.isBlank(mobile)){       int between = mobile.length()/2;       mobile = mobile.substring(0, between-2)+"****"+mobile.substring(between+2, mobile.length());     }     return mobile;   }         public String emailSerect(String email) {     if(!StringUtils.isBlank(email)){       int length = email.lastIndexOf("@");       email = email.substring(0, 2)+"****"+email.substring(length-2, email.length());     }     return email;   }         public BigDecimal sumBigDicimal(BigDecimal source, BigDecimal target) {     source = source.add(target);     return source;   }         public BigDecimal sumBigDicimalAndDouble(BigDecimal source, Double target) {     BigDecimal new_target = new BigDecimal(target);     source = source.add(new_target);     return source;   }         public BigDecimal subBigDicimal(BigDecimal source, BigDecimal target) {     source = source.subtract(target);     return source;   }         public static Long getTimediff(int timeStamp){     Date d1 = DateFormatUtil.transForDate(timeStamp);     Date today = new Date();     if(d1.getTime()<today.getTime()){       return null;     }     return (d1.getTime()-today.getTime())/1000;   }       public static String weekFirstDay(int week){     Calendar c1 = Calendar.getInstance();     int dow = c1.get(Calendar.DAY_OF_WEEK);     c1.add(Calendar.DATE, -dow-7*(week-1)-5 );     String d1 = new SimpleDateFormat("yyyy-MM-dd").format(c1.getTime());     return d1+" 00:00:00";   }         public static String addYear(int startTime){     Date firstDate = DateFormatUtil.transForDate(startTime);     Calendar calendar = Calendar.getInstance();     calendar.setTime(firstDate);     calendar.add(Calendar.YEAR,1);     String d1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(calendar.getTime());     return d1;   }         public static String weekLastDay(int week){     Calendar c1 = Calendar.getInstance();     int dow = c1.get(Calendar.DAY_OF_WEEK);     c1.add(Calendar.DATE, -dow-7*(week-1)+1);     String d1 = new SimpleDateFormat("yyyy-MM-dd").format(c1.getTime());     return d1+" 23:59:59";   }           public static boolean greaterThanNow(int timeStamp){     Date d1 = DateFormatUtil.transForDate(timeStamp);     Date today = new Date();     if(d1.getTime()>=today.getTime()){       return true;     }     return false;   }             public static int transFromTime(String time){     return transForMilliSecond("1970-01-01 "+time,"yyyy-mm-dd HH:mm:ss");   }         public static String transToTime(int time){     String s = new String(transForDate1(time));     String ss[] = s.split(" ");     return ss[1];   }      public static int transToChuo(String dateString){     SimpleDateFormat simpleDateFormat =new SimpleDateFormat("yyyy-MM-dd");     int res = 0;     try {       Date date=simpleDateFormat .parse(dateString);       res = (int) date.getTime();     } catch (ParseException e) {       e.printStackTrace();     }     return res;   }      public static void main(String[] args) {          //System.out.println(getIntegralTimeEnd());     System.out.println(transForDate2(transForMilliSecond("2015-02-25 00:00:00")));     //System.out.println(transForMilliSecond("2016-01-25","yyyy-mm-dd"));     //System.out.println(transForDate1(transForMilliSecond("1970-01-01 00:00:00","yyyy-mm-dd HH:mm:ss")));     //System.out.println(currentTimeStamp());     //System.out.println(transForDate(currentTimeStamp()));     //System.out.println(new Date());     //System.out.println(DateUtils.getDate());     System.out.println(transFromTime("00:00:01"));     System.out.println(transToTime(transFromTime("15:01:13")));   } }