时间各种处理工具集合实现：
先自定义一些时间格式样式
public static final String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";
public static final String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
public static final String YYYYMMDDHHMM = "yyyyMMddHHmm";
public static final String YYYYMMDDHH_MM = "yyyyMMddHH:mm";
public static final String YYYYMMDD = "yyyyMMdd";
public static final String YYYY_MM_DD = "yyyy-MM-dd";
public static final String YYYYMM = "yyyyMM";
public static final String HHMMSS = "HHmmss";
public static final String HH_MM = "HH:mm";
public static final String YYYY = "yyyy";
public static final Long DAY = 24 * 3600000L;
public static final Long HOURS = 3600000L;
public static final Long MINUTE = 60000L;
public static final String HHMM = "HHmm";
public static final String YYYY_MM_DD_HH_MM = "yyyy-MM-dd HH:mm";
public static final String YYYY年MM月DD日 = "yyyy年MM月dd日";格式化时间String为Date 类型
public static Date formatTimeToDate(String date, String patten) {
if (patten == null) {
patten = "yyyy-MM-dd HH:mm:ss";
}
SimpleDateFormat sdf = new SimpleDateFormat(patten);
try {
if (date == null) {
return null;
} else {
return sdf.parse(date);
}
} catch (ParseException e) {
e.printStackTrace();
return null;
}
}格式化时间Date为String 类型
public static String formatDateToString(Date date, String patten) {
if (patten == null) {
patten = "yyyy-MM-dd HH:mm:ss";
}
if (date == null) {
date = Calendar.getInstance().getTime();
}
SimpleDateFormat sdf = new SimpleDateFormat(patten);
return sdf.format(date);
}在某个时间点上，想加n小时后的时间：
/**
*date 时间
*hours 相加几小时
*/
public static Date dateAddHours(Date date, Integer hours) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(Calendar.HOUR, cal.get(Calendar.HOUR) + hours);
return cal.getTime();
}13位时间戳转换
public static String timeStamp2Date(String time) {
Long timeLong = Long.parseLong(time);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//要转换的时间格式
Date date;
try {
date = sdf.parse(sdf.format(timeLong));
return sdf.format(date);
} catch (ParseException e) {
e.printStackTrace();
return null;
}
}获取两者时间相隔多少天，两个方法不同实现
public static Integer getdaysFromTowDate(Date begin, Date end) {
begin = formatTimeToDate(formatDateToString(begin, "yyyyMMdd"), "yyyyMMdd");
end = formatTimeToDate(formatDateToString(end, "yyyyMMdd"), "yyyyMMdd");
return Integer.parseInt((end.getTime() - begin.getTime()) / (3600000 * 24) + "") + 1;
}
public static Integer daysBetween(Date smdate, Date bdate) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
smdate = sdf.parse(sdf.format(smdate));
bdate = sdf.parse(sdf.format(bdate));
} catch (ParseException e) {
return null;
}
Calendar cal = Calendar.getInstance();
cal.setTime(smdate);
long time1 = cal.getTimeInMillis();
cal.setTime(bdate);
long time2 = cal.getTimeInMillis();
long between_days = (time2 - time1) / (24000 * 3600);
return Integer.parseInt(String.valueOf(between_days));
}两个时间对比
/**
* 日期对比
* @param date1 开始时间
* @param date2 结束时间
* @return 当, 开始时间 > 结束时间 = false ,反之为true
*/
public static Boolean compareDateByGetTime(Date date1, Date date2) {
if (date1.getTime() < date2.getTime()) {
return true;
} else if (date1.getTime() > date2.getTime()) {
return false;
}
return null;
}功能：得到当月份第n个月初时间public static Date thisMonth(Date validatetime, int day) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date now = null;
try {
now = sdf.parse(sdf.format(validatetime));
} catch (ParseException e) {
e.printStackTrace();
}
Calendar calendar = Calendar.getInstance();
calendar.setTime(now);
calendar.add(Calendar.MONTH, day);
calendar.set(Calendar.DAY_OF_MONTH, 1);
return calendar.getTime();
}判断两个时间，是否在同一个月内public static boolean isBeforeMonth(Date beforeMonth, Date currentMonth) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");
long bigtime = 0;
long endtime = 0;
try {
endtime = sdf.parse(sdf.format(beforeMonth)).getTime();
bigtime = sdf.parse(sdf.format(currentMonth)).getTime();
} catch (ParseException e) {
e.printStackTrace();
}
if (bigtime == endtime) {
return true;
} else {
return false;
}
}在当前时间向后相加天数
public static Date getPlusDay(Date toDay, Long agoX) {
return new Date(toDay.getTime() + (agoX * 86400000L));
}
/**
* <p>Description: 把指定日期相加指定的天数</p>
*
* @param date 时间
* @param day 相加的天数
* @return
* @date 2019年3月4日
* @version 1.1.2
*/
public static Date dateAddDay(Date date, Integer day) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(Calendar.DAY_OF_YEAR, cal.get(Calendar.DAY_OF_YEAR) + day);
return cal.getTime();
}得到当前时间月份的第一天 /**
* <p>Description: 得到当前时间月份的第一天</p>
*
* @param date
* @return
* @date 2019年3月4日
* @version 1.1.2
*/
public static Date getFirstDaysByDate(Date date) {
Calendar a = Calendar.getInstance();
a.setTime(date);
a.set(Calendar.DAY_OF_MONTH, 1);
return a.getTime();
}把指定日期相加指定的月份/**
* <p>Description: 把指定日期相加指定的月份</p>
*
* @param date 时间
* @param month 相加的月份
* @return
* @date 2019年3月4日
* @version 1.1.2
*/
public static Date dateAddMonth(Date date, Integer month) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) + month);
return cal.getTime();
}获取今年的二月份 /**
* 获取今年的二月份
* @return date
*/
public static Date getFebOfThisYear(){
Calendar calendar = Calendar.getInstance();
//如果当前月份小于二月，取去年的年份
if (calendar.get(Calendar.MONTH) < 1){
calendar.set(Calendar.YEAR,calendar.get(Calendar.YEAR) - 1);
}
//calendar month 从0开始
calendar.set(Calendar.MONTH,1);
return calendar.getTime();
}
根据年月,得到该月的天数
/**
* <p>Description: 根据年月,得到该月的天数</p>
*
* @param year
* @param month
* @return
* @date 2019年3月4日
* @version 1.1.2
*/
public static Integer getDaysByYearMonth(Integer year, Integer month) {
Calendar a = Calendar.getInstance();
a.set(Calendar.YEAR, year);
a.set(Calendar.MONTH, month);
a.set(Calendar.DATE, 1);
a.roll(Calendar.DATE, -1);
int maxDate = a.get(Calendar.DATE);
return maxDate;
}得到当前时间月份的第一天
/**
* <p>Description: 得到当前时间月份的第一天</p>
*
* @param date
* @return
* @date 2019年3月4日
* @version 1.1.2
*/
public static Date getFirstDaysByDate(Date date) {
Calendar a = Calendar.getInstance();
a.setTime(date);
a.set(Calendar.DAY_OF_MONTH, 1);
return a.getTime();
}得到当前时间月份的最后一天
/**
* <p>Description: 得到当前时间月份的最后一天</p>
*
* @param date
* @return
* @date 2019年3月4日
* @version 1.1.2
*/
public static Date getLastDaysByDate(Date date) {
Calendar a = Calendar.getInstance();
a.setTime(date);
a.add(Calendar.MONTH, 1);
a.set(Calendar.DAY_OF_MONTH, 0);
return a.getTime();
}判断两个时间段，是否存在交集和包含
/**
* 判断两个时间段，是否存在交集和包含
*
* @param leftStartDate
* @param leftEndDate
* @param rightStartDate
* @param rightEndDate
* @return 存在交集 false ,不存在交集 true
*/
public static Boolean getDatePeriod(Date leftStartDate, Date leftEndDate, Date rightStartDate, Date rightEndDate) {
if (((leftStartDate.getTime() >= rightStartDate.getTime())
&& leftStartDate.getTime() < rightEndDate.getTime())
|| ((leftStartDate.getTime() > rightStartDate.getTime())
&& leftStartDate.getTime() <= rightEndDate.getTime())
|| ((rightStartDate.getTime() >= leftStartDate.getTime())
&& rightStartDate.getTime() < leftEndDate.getTime())
|| ((rightStartDate.getTime() > leftStartDate.getTime())
&& rightStartDate.getTime() <= leftEndDate.getTime())) {
return false;
} else {
return true;
}
}获取两个日期相隔的自然月数
/**
* <p>Description: 获取两个日期相隔的自然月数</p>
*
* @param begin 开始日期
* @param end 结束日期
* @return
* @date 2019年3月28日
* @version 1.1.2
*/
public static Integer getMouthFromTowDate(Date begin, Date end) {
Integer obj = null;
Calendar c1 = Calendar.getInstance();
Calendar c2 = Calendar.getInstance();
c1.setTime(begin);
c2.setTime(end);
if (formatDateToString(begin, YYYY).equals(formatDateToString(end, YYYY))) {
obj = c2.get(Calendar.MONTH) - c1.get(Calendar.MONTH) + 1;
} else {
obj = 13 - c1.get(Calendar.MONTH) + c1.get(Calendar.MONTH);
Integer year = c2.get(Calendar.YEAR) - c1.get(Calendar.YEAR);
if (year > 1) {
obj = obj + 12 * (year - 1);
}
}
return obj;
}
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