java时间戳与日期相互转换工具详解

本文为大家分享了java日期与时间戳相互转换大全，供大家参考，具体内容如下

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;


/**
 * @author DingJiaCheng
 * */
public class DateFormatUtil {

  /**
   * 时间戳转日期
   * @param ms
   * @return
   */
  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;
  }

  /**
   * 获取晚上9点半的时间戳
   *
   * @return
   */
  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);
  }

  /**
   * 获取当前时间往上的整点时间
   *
   * @return
   */
  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);
  }

  /**
   * 时间戳转日期
   * @param ms
   * @return
   */
  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;
  }
  /**
   * 时间戳转日期
   * @param ms
   * @return
   */
  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;
  }

  /**
   * 日期转时间戳
   * @param date
   * @return
   */
  public static Integer transForMilliSecond(Date date){
    if(date==null) return null;
    return (int)(date.getTime()/1000);
  }

  /**
   * 获取当前时间戳
   * @return
   */
  public static Integer currentTimeStamp(){
    return (int)(System.currentTimeMillis()/1000);
  }

  /**
   * 日期字符串转时间戳
   * @param dateStr
   * @return
   */
  public static Integer transForMilliSecond(String dateStr){
    Date date = DateFormatUtil.formatDate(dateStr);
    return date == null ? null : DateFormatUtil.transForMilliSecond(date);
  }
  /**
   * 日期字符串转时间戳
   * @param dateStr
   * @return
   */
  public static Integer transForMilliSecond(String dateStr,String format){
    Date date = DateFormatUtil.formatDate(dateStr,format);
    return date == null ? null : DateFormatUtil.transForMilliSecond(date);
  }
  /**
   * 日期字符串转时间戳
   * @param dateStr
   * @param 格式 如"yyyy-mm-dd"
   * @return
   */
  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);
  }
  /**
   * 字符串转日期，格式为："yyyy-MM-dd HH:mm:ss"
   * @param dateStr
   * @return
   */
  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;
  }
  /**
   * 字符串转日期，格式为："yyyy-MM-dd HH:mm:ss"
   * @param dateStr
   * @return
   */
  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;
  }
  /**
   * 日期转字符串
   * @param date
   * @return
   */
  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;
  }
  /**
   * 日期转字符串
   * @param date
   * @return
   */
  public static String formatDate(Date date,String format){
    SimpleDateFormat sdf=new SimpleDateFormat(format);
    String result=null;
    result = sdf.format(date);
    return result;
  }
  /**
   * 时间戳格式化输出（httl模版用）
   *
   * @param ms    时间戳
   * @param format  格式化
   * @return
   */
  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;
  }

  /**
   * 取BigDecimal类型数的整数或小数部分（httl模版用）
   *
   * @param b 值
   * @param mode 模式 0取整 1去小数部分
   * @return
   */
  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];
    }
  }

  /**
   * 计算两个日期之间差的天数（httl模版用）
   *
   * @param ts1  时间戳1
   * @param ts2  时间戳2
   * @return
   */
  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);
  }

  /**
   * 给手机加密中间四位加星号
   *
   * @param mobile
   * @return
   */
  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;
  }

  /**
   * 给邮箱加密加星号
   *
   * @param email
   * @return
   */
  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;
  }

  /**
   * BigDecimal类型数据相加
   *
   * @param BigDecimal source
   * @param BigDecimal target
   * @return
   */
  public BigDecimal sumBigDicimal(BigDecimal source, BigDecimal target) {
    source = source.add(target);
    return source;
  }

  /**
   * BigDecimal类型数据相加
   *
   * @param BigDecimal source
   * @param BigDecimal target
   * @return
   */
  public BigDecimal sumBigDicimalAndDouble(BigDecimal source, Double target) {
    BigDecimal new_target = new BigDecimal(target);
    source = source.add(new_target);
    return source;
  }

  /**
   * BigDecimal类型数据相减
   *
   * @param BigDecimal source
   * @param BigDecimal target
   * @return
   */
  public BigDecimal subBigDicimal(BigDecimal source, BigDecimal target) {
    source = source.subtract(target);
    return source;
  }

  /**
   * 获取传入时间和当前时间的时间差
   * @return
   */
  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;
  }

  /**
   * 获取某周的第一天日期
   * @param week 0 当周 1 上一周 -1 下一周
   * @return
   */
  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";
  }

  /**
   * 当前时间加一年
   */
  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;
  }

  /**
   * 获取某周的最后一天日期
   * @param week
   * @return
   */
  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";
  }

  /**
   * 和当前时间比对
   * @return
   */
  public static boolean greaterThanNow(int timeStamp){
    Date d1 = DateFormatUtil.transForDate(timeStamp);
    Date today = new Date();
    if(d1.getTime()>=today.getTime()){
      return true;
    }
    return false;
  }



  /**
   * HH:mm:ss格式时间转换为1970-01-01日的时间戳（也就是只有时间没有日期的情况要求使用时间戳表示时间）
   * @author DingJiaCheng
   * */
  public static int transFromTime(String time){
    return transForMilliSecond("1970-01-01 "+time,"yyyy-mm-dd HH:mm:ss");
  }

  /**
   * 时间戳转换为HH：mm：ss格式时间(日期去除)
   * @author DingJiaCheng
   * */
  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")));
  }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。

原文链接：http://blog.****.net/djc777/article/details/50904989