java处理日期的工具类DateUtil

package com.leo.demo.othertest;
import org.slf4j.LoggerFactory;
import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.logging.Logger;


/**
 * 时间工具类
 */
public final class DateUtil {
  private static Logger logger = (Logger) LoggerFactory.getLogger(DateUtil.class);

  /**
   * 日期格式
   */
  public interface DATE_PATTERN {
    String HHMMSS = "HHmmss";
    String HH_MM_SS = "HH:mm:ss";
    String HH_MM = "HH:mm";
    String YYYY = "yyyy";
    String YYYYMMDD = "yyyyMMdd";
    String YYYYMM = "yyyyMM";
    String YYYY_MM_DD = "yyyy-MM-dd";
    String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";
    String YYYYMMDDHHMMSSSSS = "yyyyMMddHHmmssSSS";
    String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
  }

  /**
   * 获取当前时间
   *
   * @return Timestamp对象
   */
  public static Timestamp getCurrontTime() {
    Timestamp sqlTimestamp = new Timestamp(new Date().getTime());
    return sqlTimestamp;
  }

  /**
   * 将Date类型转换成String类型
   *
   * @param date Date对象
   * @return 形如:"yyyy-MM-dd HH:mm:ss"
   */
  public static String date2String(Date date) {
    return date2String(date, DATE_PATTERN.YYYY_MM_DD_HH_MM_SS);
  }

  /**
   * 将Date按格式转化成String
   *
   * @param date  Date对象
   * @param pattern 日期类型
   * @return String
   */
  public static String date2String(Date date, String pattern) {
    if (date == null || pattern == null) {
      return null;
    }
    return new SimpleDateFormat(pattern).format(date);
  }

  /**
   * 将String类型转换成Date类型
   *
   * @param date Date对象
   * @return
   */
  public static Date string2Date(String date) {
    SimpleDateFormat format = new SimpleDateFormat(DATE_PATTERN.YYYY_MM_DD_HH_MM_SS);
    try {
      return format.parse(date);
    } catch (ParseException e) {
      return null;
    }
  }

  /**
   * 获取某日期N天后的日期
   *
   * @param datestr
   * @param day
   * @return
   */
  public static Date getBeforeAfterDate(String datestr, int day) {
    SimpleDateFormat df = new SimpleDateFormat(DATE_PATTERN.YYYY_MM_DD_HH_MM_SS);
    java.sql.Date olddate = null;
    try {
      df.setLenient(false);
      olddate = new java.sql.Date(df.parse(datestr).getTime());
    } catch (ParseException e) {
      throw new RuntimeException("日期转换错误");
    }
    Calendar cal = new GregorianCalendar();
    cal.setTime(olddate);

    int Year = cal.get(Calendar.YEAR);
    int Month = cal.get(Calendar.MONTH);
    int Day = cal.get(Calendar.DAY_OF_MONTH);

    int NewDay = Day + day;

    cal.set(Calendar.YEAR, Year);
    cal.set(Calendar.MONTH, Month);
    cal.set(Calendar.DAY_OF_MONTH, NewDay);

    return new Date(cal.getTimeInMillis());
  }


  /**
   * @return
   * @Description: 获取当前日期的前一天
   * @ReturnType String
   * @author: liyl
   * @Created 2015年11月13日 下午5:11:14
   */
  public static Date currentBeforeDay() {
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(new Date());
    calendar.add(Calendar.DAY_OF_MONTH, -1);
    return calendar.getTime();
  }

  /**
   * @return
   * @Description: 获取当前日期的后一天
   * @ReturnType Date
   * @author: liyl
   * @Created 2015年11月13日 下午5:14:54
   */
  public static Date currentNextDay() {
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(new Date());
    calendar.add(Calendar.DAY_OF_MONTH, 1);
    return calendar.getTime();
  }

  /**
   * 获取指定日期星期几(int)
   *
   * @param dt
   * @return
   */
  public static int getWeekOfInt(Date dt) {
    int[] weekDays = {7, 1, 2, 3, 4, 5, 6};
    Calendar cal = Calendar.getInstance();
    cal.setTime(dt);
    int w = cal.get(Calendar.DAY_OF_WEEK) - 1;
    if (w < 0) {
      w = 0;
    }
    return weekDays[w];
  }

  /**
   * 获取指定日期星期几
   *
   * @param dt
   * @return
   */
  public static String getWeekOfDate(Date dt) {
    String[] weekDays = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};
    Calendar cal = Calendar.getInstance();
    cal.setTime(dt);
    int w = cal.get(Calendar.DAY_OF_WEEK) - 1;
    if (w < 0) {
      w = 0;
    }
    return weekDays[w];
  }

  /**
   * 时间比大小
   *
   * @param DATE1
   * @param DATE2
   * @param pattern
   * @return
   */
  public static int compareDate(String DATE1, String DATE2, String pattern) {

    DateFormat df = new SimpleDateFormat(pattern);
    try {
      Date dt1 = df.parse(DATE1);
      Date dt2 = df.parse(DATE2);
      if (dt1.getTime() > dt2.getTime()) {
        System.out.println("dt1 在dt2前");
        return 1;
      } else if (dt1.getTime() < dt2.getTime()) {
        System.out.println("dt1在dt2后");
        return -1;
      } else {
        return 0;
      }
    } catch (Exception exception) {
      exception.printStackTrace();
    }
    return 0;
  }

  /**
   * 在一个时间上加上或减去分钟
   *
   * @param date long
   * @param i  int
   * @return Date
   */
  public static Date addOrMinusMinutes(Date date, int i) {
    Date rtn = null;
    GregorianCalendar cal = new GregorianCalendar();
    cal.setTime(date);
    cal.add(GregorianCalendar.MINUTE, i);
    rtn = cal.getTime();
    return rtn;
  }

  /**
   * 按照指定格式返回格式好的当前日期
   *
   * @param dateFormat 默认yyyy-MM-dd
   * @return
   */
  public static String getCurrentDateString(String dateFormat) {
    return DateUtil.format(new Date(), DATE_PATTERN.YYYY_MM_DD);
  }

  /**
   * 说明 将日期格式化字符串，为null的返回空字符串
   *
   * @param date
   * @return
   */
  public static String format(Date date) {
    if (null == date) return "";
    SimpleDateFormat sf = new SimpleDateFormat(DATE_PATTERN.YYYY_MM_DD);
    return sf.format(date);
  }

  /**
   * 说明 将日期格式化字符串，为null的返回空字符串
   *
   * @param date    日期
   * @param dateFormat 格式化字符串，比如：yyyy-MM-dd
   * @return
   */
  public static String format(Date date, String dateFormat) {
    if (null == dateFormat || "".equals(dateFormat)) return DateUtil.format(date);
    if (null == date) return "";
    SimpleDateFormat sf = new SimpleDateFormat(dateFormat);
    return sf.format(date);
  }

  /**
   * @param source 要进行解析的源字符串
   * @return
   * @说明 将指定的字符串格解析成日期类型，格式默认为：yyyy-MM-dd
   */
  public static Date parase(String source) {
    SimpleDateFormat sf = new SimpleDateFormat(DATE_PATTERN.YYYY_MM_DD);
    try {
      return sf.parse(source);
    } catch (ParseException e) {
      e.printStackTrace();
    }
    return null;
  }

  /**
   * @param source   要进行解析的源字符串
   * @param dateFormat 要解析的日期格式。
   * @return
   * @说明 将指定的字符串格解析成日期类型 例：如果日期source=20131210,则dateFormat应为：yyyyMMdd,两个应对应
   */
  public static Date parase(String source, String dateFormat) {
    SimpleDateFormat sf = new SimpleDateFormat(dateFormat);
    try {
      return sf.parse(source);
    } catch (ParseException e) {
      e.printStackTrace();
    }
    return null;
  }

  /**
   * @param date
   * @param days
   * @说明 对指定的日期增加或减少指定的天数
   */
  public static Date addDays(Date date, int days) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);
    cal.add(Calendar.DAY_OF_MONTH, days);
    return cal.getTime();
  }

  /**
   * @param date
   * @param days
   * @说明 对指定的日期增加或减少指定的天数
   */
  public static Calendar addDays(Calendar date, int days) {
    date.add(Calendar.DAY_OF_MONTH, days);
    return date;
  }

  /**
   * @param date
   * @param months
   * @return
   * @说明 对指定的日期增加或减少指定的月数
   */
  public static Date addMonths(Date date, int months) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);
    cal.add(Calendar.MONTH, months);
    return cal.getTime();
  }

  /**
   * @param date
   * @param months
   * @return
   * @说明 对指定的日期增加或减少指定的月数
   */
  public static Calendar addMonths(Calendar date, int months) {
    date.add(Calendar.MONTH, months);
    return date;
  }

  /**
   * @param date
   * @param hours
   * @return
   * @说明 对指定的日期增加或减少指定的小时数
   */
  public static Date addHours(Date date, int hours) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(date);
    cal.add(Calendar.HOUR_OF_DAY, hours);
    return cal.getTime();
  }

  /**
   * 对指定的日期增加或减少指定的小时数
   *
   * @param date
   * @param hours
   * @return
   */
  public static Calendar addHours(Calendar date, int hours) {
    date.add(Calendar.HOUR_OF_DAY, hours);
    return date;
  }

  /**
   * 以字符串形式返回当前时间的毫秒数
   *
   * @return
   */
  public static String getTimeMillions() {
    Calendar cal = Calendar.getInstance();
    long lt = cal.getTimeInMillis();
    return String.valueOf(lt);
  }

  /**
   * 获取当前月的第一天
   *
   * @return 当前月的第一天
   */
  public static String getMonthFirstDay() {
    SimpleDateFormat df = new SimpleDateFormat(DATE_PATTERN.YYYY_MM_DD);
    Calendar calendar = Calendar.getInstance();
    Date theDate = calendar.getTime();
    GregorianCalendar gcLast = (GregorianCalendar) Calendar.getInstance();
    gcLast.setTime(theDate);
    gcLast.set(Calendar.DAY_OF_MONTH, 1);
    String day_first = df.format(gcLast.getTime());
    StringBuffer str = new StringBuffer().append(day_first);
    return str.toString();

  }

  /**
   * 获取当前月的最后一天
   *
   * @return 当前月的最后一天
   */
  public static String getMonthLastDay() {
    Calendar calendar = Calendar.getInstance();
    // 最后一天
    int maxday = calendar.getActualMaximum(Calendar.DATE);
    calendar.set(Calendar.DATE, maxday);
    SimpleDateFormat df = new SimpleDateFormat(DATE_PATTERN.YYYY_MM_DD);
    Date theDate = calendar.getTime();
    String s = df.format(theDate);
    StringBuffer str = new StringBuffer().append(s);
    return str.toString();

  }

  /**
   * 获取当前月的第一天，精确到时分秒
   *
   * @return 当前月的第一天，精确到时分秒
   */
  public static Date getFirstDayOfMonth() {
    Calendar calendar = Calendar.getInstance();
    calendar.add(Calendar.MONTH, 0);
    calendar.set(Calendar.DAY_OF_MONTH, 1);
    calendar.set(Calendar.HOUR_OF_DAY, 0);
    calendar.set(Calendar.MINUTE, 0);
    calendar.set(Calendar.SECOND, 0);
    Date date = calendar.getTime();
    return date;
  }

  /**
   * 获得往数据库字段类型为Date型时，插入的时间
   *
   * @param date    默认为当前日期，如果为空时 方法会自动new Date()
   * @param dateFormat 默认为yyyy-MM-dd
   * @return
   */
  public static java.sql.Date paraseSqlDate(String date, String dateFormat) {
    try {
      if (date == null || date.length() == 0) {
        return new java.sql.Date(new Date().getTime());
      } else {
        if (dateFormat == null) dateFormat = DateUtil.DATE_PATTERN.YYYY_MM_DD;
        SimpleDateFormat sf = new SimpleDateFormat(dateFormat);
        Date d = sf.parse(date);
        return new java.sql.Date(d.getTime());
      }
    } catch (Exception e) {
      // TODO: handle exception
    }
    return null;
  }

  /**
   * 将日期按照特定格式转换成字符串
   *
   * @param date
   * @param pattern
   * @return
   */
  public static String formatString(Date date, String pattern) {
    SimpleDateFormat dateFormat = new SimpleDateFormat(pattern);
    return dateFormat.format(date);
  }

  /**
   * 将日期字符串转换为日期
   *
   * @param strDate
   * @param mask
   * @return
   * @throws ParseException
   */
  public static Timestamp convertStringToTimestamp(String strDate, String mask) throws ParseException {
    SimpleDateFormat df;
    Date date = null;
    df = new SimpleDateFormat(mask);
    try {
      date = df.parse(strDate);
      return new Timestamp(date.getTime());
    } catch (ParseException pe) {
      throw new ParseException(pe.getMessage(), pe.getErrorOffset());
    }
  }

  /**
   * 月份相加 add by yuanjq
   *
   * @param timest1
   * @param month
   * @return
   */
  public static Timestamp DateAddMonth(Timestamp timest1, int month) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(timest1);
    cal.add(Calendar.MONTH, month);
    return new Timestamp(cal.getTimeInMillis());
  }

  /**
   * 对输入的日期进行格式化, 如果输入的日期是null则返回空串.
   * FrameWork使用
   *
   * @param dtDate   java.sql.Timestamp 需要进行格式化的日期字符串
   * @param strFormatTo String 要转换的日期格式
   * @return String 经过格式化后的字符串
   */
  public static String getFormattedDate(java.sql.Timestamp dtDate,
                     String strFormatTo) {
    if (dtDate == null) {
      return "";
    }
    if (dtDate.equals(new java.sql.Timestamp(0))) {
      return "";
    }
    String newStrFormateTo = strFormatTo;
    newStrFormateTo = newStrFormateTo.replace('/', '-');
    SimpleDateFormat formatter = new SimpleDateFormat("yyyy");
    if (Integer.parseInt(formatter.format(dtDate)) < 1900) {
      return "";
    } else {
      formatter = new SimpleDateFormat(newStrFormateTo);
      return formatter.format(dtDate);
    }
  }

  /**
   * 获取当前时间年月日
   *
   * @return
   */
  public static String getCurrentDateYMR() {
    SimpleDateFormat sdf = new SimpleDateFormat(DATE_PATTERN.YYYYMMDD);
    return sdf.format(System.currentTimeMillis());
  }

  /**
   * 根据字符串以及格式化方式获取date对象
   *
   * @param strDate
   * @param strFormat
   * @return
   * @throws ParseException
   */
  public static Date getDate(String strDate, String strFormat) throws ParseException {
    SimpleDateFormat format = new SimpleDateFormat(strFormat);
    Date date = format.parse(strDate);
    return date;
  }

  /**
   * 根据字符串以及格式化方式获取时间戳
   *
   * @param strDate
   * @param strFormat
   * @return
   * @throws ParseException
   */
  public static Timestamp getTimestamp(String strDate, String strFormat) throws ParseException {
    Date date = getDate(strDate, strFormat);
    Timestamp timestamp = new Timestamp(date.getTime());

    return timestamp;
  }

  /**
   * 根据Date获取格式化后的字符串
   *
   * @param date
   * @param strFormat
   * @return
   * @throws ParseException
   */
  public static String getStringDate(Date date, String strFormat) throws ParseException {
    if (date == null) {
      return "";
    }
    SimpleDateFormat format = new SimpleDateFormat(strFormat);
    String strDate = format.format(date);
    return strDate;
  }

  /**
   * 根据时间戳格式化时间
   *
   * @param timestamp
   * @param strFormat
   * @return
   * @throws ParseException
   */
  public static String getStringTimestamp(Timestamp timestamp, String strFormat) throws ParseException {
    if (timestamp == null) {
      return "";
    }
    String strTimestamp = getStringDate((Date) timestamp, strFormat);
    return strTimestamp;
  }


  /**
   * 根据时间戳偏移几个月
   *
   * @param timestamp
   * @param months
   * @return
   * @throws ParseException
   */
  public static Timestamp addMonth(Timestamp timestamp, int months) throws ParseException {
    GregorianCalendar grc = new GregorianCalendar();
    grc.setTime((Date) timestamp);
    grc.add(GregorianCalendar.MONTH, months);
    return new Timestamp(grc.getTime().getTime());
  }

  /**
   * 根据时间戳偏移几年
   *
   * @param timestamp
   * @param years
   * @return
   * @throws ParseException
   */
  public static Timestamp addYear(Timestamp timestamp, int years) throws ParseException {
    GregorianCalendar grc = new GregorianCalendar();
    grc.setTime((Date) timestamp);
    grc.add(GregorianCalendar.YEAR, years);
    return new Timestamp(grc.getTime().getTime());
  }

  /**
   * 根据时间戳偏移几天
   *
   * @param timestamp
   * @param days
   * @return
   * @throws ParseException
   */
  public static Timestamp addDay(Timestamp timestamp, int days) throws ParseException {
    GregorianCalendar grc = new GregorianCalendar();
    grc.setTime((Date) timestamp);
    grc.add(GregorianCalendar.DAY_OF_MONTH, days);
    return new Timestamp(grc.getTime().getTime());
  }

  /**
   * 根据时间戳偏移几小时
   *
   * @param timestamp
   * @param hours
   * @return
   * @throws ParseException
   */
  public static Timestamp addHour(Timestamp timestamp, int hours) throws ParseException {
    GregorianCalendar grc = new GregorianCalendar();
    grc.setTime((Date) timestamp);
    grc.add(GregorianCalendar.HOUR_OF_DAY, hours);
    return new Timestamp(grc.getTime().getTime());
  }

  /**
   * 根据时间戳偏移几分钟
   *
   * @param timestamp
   * @param minutes
   * @return
   * @throws ParseException
   */
  public static Timestamp addMinute(Timestamp timestamp, int minutes) throws ParseException {
    GregorianCalendar grc = new GregorianCalendar();
    grc.setTime((Date) timestamp);
    grc.add(GregorianCalendar.MINUTE, minutes);
    return new Timestamp(grc.getTime().getTime());
  }

  /**
   * 根据时间戳偏移几秒钟
   *
   * @param timestamp
   * @param seconds
   * @return
   * @throws ParseException
   */
  public static Timestamp addSecond(Timestamp timestamp, int seconds) throws ParseException {
    GregorianCalendar grc = new GregorianCalendar();
    grc.setTime((Date) timestamp);
    grc.add(GregorianCalendar.SECOND, seconds);
    return new Timestamp(grc.getTime().getTime());
  }

  /**
   * 根据时间的毫秒值格式化时间
   *
   * @param time
   * @param strFormat
   * @return
   * @throws ParseException
   */
  public static String getTime(String time, String strFormat) throws ParseException {
    Timestamp endLogDateFormated = getTimestamp(time, strFormat);
    String sTime = getStringTimestamp(endLogDateFormated, DATE_PATTERN.YYYYMMDD);
    return sTime;
  }

  /**
   * 转换时间格式化方式
   *
   * @param time
   * @param strFormat
   * @return
   * @throws ParseException
   */
  public static String getTimeNew(String time, String strFormat) throws ParseException {
    Timestamp endLogDateFormated = getTimestamp(time, strFormat);
    String sTime = getStringTimestamp(endLogDateFormated, DATE_PATTERN.YYYY_MM_DD_HH_MM_SS);
    return sTime;
  }

  /**
   * 根据传入的日期字符串转换成相应的日期对象，
   * 如果字符串为空或不符合日期格式，则返回当前时间。
   * FrameWork使用
   *
   * @param strDate String 日期字符串
   * @return java.sql.Timestamp 日期对象
   */
  public static java.sql.Timestamp getDateByString(String strDate) {
    if (strDate.trim().equals("")) {
      return getCurrentDate();
    }
    try {
      strDate = getFormattedDate(strDate, DATE_PATTERN.YYYY_MM_DD_HH_MM_SS) + ".000000000";
      return java.sql.Timestamp.valueOf(strDate);
    } catch (Exception ex) {
      return getCurrentDate();
    }
  }

  /**
   * 获取当前数据库时间
   *
   * @return
   */
  public static Timestamp getCurrentDate() {
    try {
      SimpleDateFormat formatter = new SimpleDateFormat(DATE_PATTERN.YYYY_MM_DD_HH_MM_SS + ".0");
      return Timestamp.valueOf(formatter.format(new Date()));
    } catch (Exception e) {
      return null;
    }
  }

  /**
   * 对输入的日期字符串进行格式化,
   * 如果输入的是0000/00/00 00:00:00则返回空串.
   * FrameWork使用
   *
   * @param strDate   String 需要进行格式化的日期字符串
   * @param strFormatTo String 要转换的日期格式
   * @return String 经过格式化后的字符串
   */
  public static String getFormattedDate(String strDate, String strFormatTo) {
    if ((strDate == null) || strDate.trim().equals("")) {
      return "";
    }
    strDate = strDate.replace('/', '-');
    strFormatTo = strFormatTo.replace('/', '-');
    if (strDate.equals("0000-00-00 00:00:00") ||
        strDate.equals("1800-01-01 00:00:00")) {
      return "";
    }
    String formatStr = strFormatTo; //"yyyyMMdd";
    if (strDate.trim().equals("")) { //(strDate == null) ||
      return "";
    }
    switch (strDate.trim().length()) {
      case 6:
        if (strDate.substring(0, 1).equals("0")) {
          formatStr = "yyMMdd";
        } else {
          formatStr = "yyyyMM";
        }
        break;
      case 8:
        formatStr = "yyyyMMdd";
        break;
      case 10:
        if (strDate.indexOf("-") == -1) {
          formatStr = "yyyy/MM/dd";
        } else {
          formatStr = "yyyy-MM-dd";
        }
        break;
      case 11:
        if (strDate.getBytes().length == 14) {
          formatStr = "yyyy年MM月dd日";
        } else {
          return "";
        }
        break;
      case 14:
        formatStr = "yyyyMMddHHmmss";
        break;
      case 19:
        if (strDate.indexOf("-") == -1) {
          formatStr = "yyyy/MM/dd HH:mm:ss";
        } else {
          formatStr = "yyyy-MM-dd HH:mm:ss";
        }
        break;
      case 21:
        if (strDate.indexOf("-") == -1) {
          formatStr = "yyyy/MM/dd HH:mm:ss.S";
        } else {
          formatStr = "yyyy-MM-dd HH:mm:ss.S";
        }
        break;
      default:
        return strDate.trim();
    }
    try {
      SimpleDateFormat formatter = new SimpleDateFormat(formatStr);
      Calendar calendar = Calendar.getInstance();
      calendar.setTime(formatter.parse(strDate));
      formatter = new SimpleDateFormat(strFormatTo);
      return formatter.format(calendar.getTime());
    } catch (Exception e) {
      return "";
    }
  }

  /**
   * 处理微信日期
   *
   * @param date
   * @return
   */
  public static String dealWechatDate(String date) {
    String result;
    if (date == null || "".equals(date)) {
      result = date;
    } else if (date.indexOf(".") > -1) {
      result = date.replace(".", "-");
    } else if (date.indexOf("年") > -1) {
      result = date.replace("年", "-").replace("月", "-").replace("日", "");
    } else if (date.indexOf("-") > -1) {
      result = date.replace("年", "-").replace("月", "-").replace("日", "");
    } else {
      result = date;
    }
    return result;
  }

  /**
   * 获取两个日期相差的月数
   *
   * @param d1 较大的日期
   * @param d2 较小的日期
   * @return 如果d1>d2返回 月数差 否则返回0
   */
  public static int monthsBetween(Date d1, Date d2) {
    Calendar c1 = Calendar.getInstance();
    Calendar c2 = Calendar.getInstance();
    c1.setTime(d1);
    c2.setTime(d2);
    if (c1.getTimeInMillis() < c2.getTimeInMillis()) return 0;
    int year1 = c1.get(Calendar.YEAR);
    int year2 = c2.get(Calendar.YEAR);
    int month1 = c1.get(Calendar.MONTH);
    int month2 = c2.get(Calendar.MONTH);
    int day1 = c1.get(Calendar.DAY_OF_MONTH);
    int day2 = c2.get(Calendar.DAY_OF_MONTH);
    // 获取年的差值 假设 d1 = 2015-8-16 d2 = 2011-9-30
    int yearInterval = year1 - year2;
    // 如果 d1的 月-日 小于 d2的 月-日 那么 yearInterval-- 这样就得到了相差的年数
    if (month1 < month2 || month1 == month2 && day1 < day2) yearInterval--;
    // 获取月数差值
    int monthInterval = (month1 + 12) - month2;
    if (day1 < day2) monthInterval--;
    monthInterval %= 12;
    return yearInterval * 12 + monthInterval;
  }

  /**
   * 计算date2 - date1之间相差的天数
   *
   * @param date1
   * @param date2
   * @return 如果d1>d2返回 月数差 否则返回0
   */
  public static int daysBetween(Date date1, Date date2) {
    DateFormat sdf = new SimpleDateFormat(DATE_PATTERN.YYYYMMDD);
    Calendar cal = Calendar.getInstance();
    try {
      Date d1 = sdf.parse(date2String(date1, DATE_PATTERN.YYYYMMDD));
      Date d2 = sdf.parse(date2String(date2, DATE_PATTERN.YYYYMMDD));
      cal.setTime(d1);
      long time1 = cal.getTimeInMillis();
      cal.setTime(d2);
      long time2 = cal.getTimeInMillis();
      return Integer.parseInt(String.valueOf((time2 - time1) / 86400000L));
    } catch (Exception e) {
      e.printStackTrace();
    }
    return 0;
  }

  /**
   * 计算date2 - date1之间相差的分钟
   *
   * @param date1
   * @param date2
   * @return
   */
  @SuppressWarnings("deprecation")
  public static int minutesBetween(Date date1, Date date2) {
    Calendar cal = Calendar.getInstance();
    // date1.setSeconds(0);
    cal.setTime(date1);
    long time1 = cal.getTimeInMillis();
    cal.setTime(date2);
    long time2 = cal.getTimeInMillis();
    if (time2 - time1 <= 0) {
      return 0;
    } else {
      return Integer.parseInt(String.valueOf((time2 - time1) / 60000L)) + 1;
    }
  }

  /**
   * 计算date2 - date1之间相差的秒
   *
   * @param date1
   * @param date2
   * @return
   */
  @SuppressWarnings("deprecation")
  public static int secondBetween(Date date1, Date date2) {
    Calendar cal = Calendar.getInstance();
    // date1.setSeconds(0);
    cal.setTime(date1);
    long time1 = cal.getTimeInMillis();
    cal.setTime(date2);
    long time2 = cal.getTimeInMillis();
    if (time2 - time1 <= 0) {
      return 0;
    } else {
      return Integer.parseInt(String.valueOf((time2 - time1) / 1000L)) + 1;
    }
  }

  /**
   * 计算date2 - date1之间相差的毫秒
   *
   * @param date1
   * @param date2
   * @return
   */
  @SuppressWarnings("deprecation")
  public static int millisecondBetween(Date date1, Date date2) {
    Calendar cal = Calendar.getInstance();
    cal.setTime(date1);
    long time1 = cal.getTimeInMillis();
    cal.setTime(date2);
    long time2 = cal.getTimeInMillis();
    if (time2 - time1 <= 0) {
      return 0;
    } else {
      return Integer.parseInt(String.valueOf((time2 - time1)));
    }
  }

}