public static String YYYY = "yyyy";
public static String MM_DD = "MM-dd";
public static String HH_MM_SS = "HH:mm:ss";
public static String YYYY_MM = "yyyy-MM";
public static String YYYY_MM_DD = "yyyy-MM-dd";
public static String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";
public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";
private static String[] parsePatterns = { "yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM",
"yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy/MM", "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss",
"yyyy.MM.dd HH:mm", "yyyy.MM" };
/**
* 获取当前Date型日期
*
* @return Date() 当前日期
*/
public static Date getNowDate() {
return new Date();
}
/**
* 获取当前日期, 默认格式为yyyy-MM-dd
*
* @return String
*/
public static String getDate() {
return dateTimeNow(YYYY_MM_DD);
}
public static final String getTime() {
return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
}
public static final String dateTimeNow() {
return dateTimeNow(YYYYMMDDHHMMSS);
}
public static final String dateTimeNow(final String format) {
return parseDateToStr(format, new Date());
}
public static final String dateTime(final Date date) {
return parseDateToStr(YYYY_MM_DD, date);
}
public static final String parseDateToStr(final String format, final Date date) {
return new SimpleDateFormat(format).format(date);
}
public static final Date dateTime(final String format, final String ts) {
try {
return new SimpleDateFormat(format).parse(ts);
} catch (ParseException e) {
throw new RuntimeException(e);
}
}
/**
* 日期路径 即年/月/日 如2018/08/08
*/
public static final String datePath() {
Date now = new Date();
return DateFormatUtils.format(now, "yyyy/MM/dd");
}
/**
* 日期路径 即年/月/日 如20180808
*/
public static final String dateTime() {
Date now = new Date();
return DateFormatUtils.format(now, "yyyyMMdd");
}
/**
* 日期型字符串转化为日期 格式
*/
public static Date parseDate(Object str) {
if (str == null) {
return null;
}
try {
return parseDate(str.toString(), parsePatterns);
} catch (ParseException e) {
return null;
}
}
/**
* 获取服务器启动时间
*/
public static Date getServerStartDate() {
long time = ManagementFactory.getRuntimeMXBean().getStartTime();
return new Date(time);
}
/**
* 计算两个时间差
*/
public static String getDatePoor(Date endDate, Date nowDate) {
long nd = 1000 * 24 * 60 * 60;
long nh = 1000 * 60 * 60;
long nm = 1000 * 60;
// long ns = 1000;
// 获得两个时间的毫秒时间差异
long diff = endDate.getTime() - nowDate.getTime();
// 计算差多少天
long day = diff / nd;
// 计算差多少小时
long hour = diff % nd / nh;
// 计算差多少分钟
long min = diff % nd % nh / nm;
// 计算差多少秒//输出结果
// long sec = diff % nd % nh % nm / ns;
return day + "天" + hour + "小时" + min + "分钟";
}
/**
* 返回指定日期前后N天的日期
*
* @param date 日期
* @param nDay 前后N天 正为后 负为前
* @return
*/
public static String getLastOrNextNDay(LocalDate date, int nDay) {
LocalDate dateTime = date.plusDays(nDay);
return dateTime.toString();
}
/**
* 返回指定日期前N个月的月份集合
*
* @param date 日期
* @param nMonth 前N个月
* @return
*/
public static List<String> getLastNMonths(LocalDate date, int nMonth) {
List<String> months = new ArrayList<>(nMonth);
for (int i = nMonth; i > 0; i--) {
LocalDate localDate = date.minusMonths(i);
String ss = localDate.toString().substring(0, 7);
months.add(ss);
}
return months;
}
/**
* 取得与原日期相差一定天数的日期，返回Date型日期
*
* @param date 原日期
* @param intBetween 相差的天数
* @return date加上intBetween天后的日期
*/
public static Date getDateBetween(Date date, int intBetween) {
Calendar calo = Calendar.getInstance();
calo.setTime(date);
calo.add(Calendar.DATE, intBetween);
return calo.getTime();
}
/**
* 按指定格式取得与原日期相差一定天数的日期，返回String型日期
*
* @param date 原日期
* @param intBetween 相差的日期 正数为后 负数为前
* @param strFromat 返回日期的格式
* @return date加上intBetween天后的日期
*/
public static String getDateBetween_String(Date date, int intBetween, String strFromat) {
Date dateOld = getDateBetween(date, intBetween);
return getFomartDate(dateOld, strFromat);
}
/**
* 简单转换日期类型到字符串类型，本地信息设为UK
*
* @param date
* @param format
* @return String
*/
public static String getFomartDate(Date date, String format) {
try {
return new SimpleDateFormat(format, Locale.UK).format(date);
} catch (Exception e) {
e.printStackTrace();
return (date == null) ? new Date().toString() : date.toString();
}
}
/**
* @Author: zengkai
* @Title: getFirstDayOfWeek
* @Description 获取本周的第一天或最后一天
* @Date: 2019/7/23 10:59
* @Param: [today, isFirst: true 表示开始时间，false表示结束时间]
* @return: java.lang.String
* @Exception:
*/
public static String getStartOrEndDayOfWeek(LocalDate today, Boolean isFirst) {
LocalDate resDate = LocalDate.now();
if (today == null) {
today = resDate;
}
DayOfWeek week = today.getDayOfWeek();
int value = week.getValue();
if (isFirst) {
resDate = today.minusDays(value - 1);
} else {
resDate = today.plusDays(7 - value);
}
return resDate.toString();
}
/**
* 功能描述: 获取N分钟之前的时间
*
* @Param: [minute]
* @Return: java.lang.String
* @Author: Kai
* @Date: 2020/11/13 16:41
*/
public static String getLastDateTimeByMinute(int minute) {
Calendar beforeTime = Calendar.getInstance();
beforeTime.add(Calendar.MINUTE, -minute);
Date beforeDate = beforeTime.getTime();
return parseDateToStr(DateUtils.YYYY_MM_DD_HH_MM_SS, beforeDate);
}
/**
* 获取指定年份的指定月份数
*
* @return
*/
public static List<String> getInitMonthToYear(int year, int month) {
Calendar c = Calendar.getInstance();
if (month == 0) {
month = c.get(Calendar.MONTH) + 1;
}
List<String> list = getMonth(year, month);
return list;
}
private static List<String> getMonth(int year, int monthNum) {
Calendar c = Calendar.getInstance();
List<String> list = new ArrayList<>(monthNum);
for (int i = 0; i < monthNum; i++) {
int k = year;
int j = c.get(Calendar.MONTH) + 1 - i;
String date;
if (j >= 1) {
date = k + "-" + (j >= 10 ? "" : "0") + j;
} else {
// 剩余循环次数
int p = 11 - i;
int m = c.get(Calendar.YEAR) - 1;
int n = c.get(Calendar.MONTH) + 2 + p;
date = m + "-" + (n >= 10 ? "" : "0") + n;
}
list.add(date);
}
return list;
}
/**
* @Author: umizhang
* @Title: getStartOrEndDayOfMonth
* @Description TODO 获取本月的第一天或最后一天
* @Date: 2019/7/23 11:50
* @Param: [today, isFirst: true 表示开始时间，false表示结束时间]
* @return: java.lang.String
* @Exception:
*/
public static String getStartOrEndDayOfMonth(LocalDate today, Boolean isFirst) {
LocalDate resDate = LocalDate.now();
if (today == null) {
today = resDate;
}
Month month = today.getMonth();
int length = month.length(today.isLeapYear());
if (isFirst) {
resDate = LocalDate.of(today.getYear(), month, 1);
} else {
resDate = LocalDate.of(today.getYear(), month, length);
}
return resDate.toString();
}
/**
* @Author:
* @Title: getStartOrEndDayOfQuarter
* @Description TODO 获取本季度的第一天或最后一天
* @Date: 2019/7/23 13:46
* @Param: [today, isFirst: true 表示开始时间，false表示结束时间]
* @return: java.lang.String
* @Exception:
*/
public static String getStartOrEndDayOfQuarter(LocalDate today, Boolean isFirst) {
LocalDate resDate = LocalDate.now();
if (today == null) {
today = resDate;
}
Month month = today.getMonth();
Month firstMonthOfQuarter = month.firstMonthOfQuarter();
Month endMonthOfQuarter = Month.of(firstMonthOfQuarter.getValue() + 2);
if (isFirst) {
resDate = LocalDate.of(today.getYear(), firstMonthOfQuarter, 1);
} else {
resDate = LocalDate.of(today.getYear(), endMonthOfQuarter, endMonthOfQuarter.length(today.isLeapYear()));
}
return resDate.toString();
}
/**
* @Author: umizhang
* @Title: getStartOrEndOfYear
* @Description TODO 获取本年的第一天或最后一天
* @Date: 2019/7/23 13:48
* @Param: [today, isFirst: true 表示开始时间，false表示结束时间]
* @return: java.lang.String
* @Exception:
*/
public static String getStartOrEndDayOfYear(LocalDate today, Boolean isFirst) {
LocalDate resDate = LocalDate.now();
if (today == null) {
today = resDate;
}
if (isFirst) {
resDate = LocalDate.of(today.getYear(), Month.JANUARY, 1);
} else {
resDate = LocalDate.of(today.getYear(), Month.DECEMBER, Month.DECEMBER.length(today.isLeapYear()));
}
return resDate.toString();
}
/**
* 得到将date增加指定天数后的date
*
* @param date 日期
* @param intBetween 增加的天数
* @return date 加上intBetween天数后的日期
*/
public static Date increaseDay(Date date, int intBetween) {
Calendar calo = Calendar.getInstance();
calo.setTime(date);
calo.add(Calendar.DATE, intBetween);
return calo.getTime();
}
/**
* 获取指定日期所在月份开始的时间戳
*
* @param date 指定日期
* @return
*/
public static Date getMonthBegin(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
// 设置为1号,当前日期既为本月第一天
c.set(Calendar.DAY_OF_MONTH, 1);
// 将小时至0
c.set(Calendar.HOUR_OF_DAY, 0);
// 将分钟至0
c.set(Calendar.MINUTE, 0);
// 将秒至0
c.set(Calendar.SECOND, 0);
// 将毫秒至0
c.set(Calendar.MILLISECOND, 0);
// 获取本月第一天的时间戳
return c.getTime();
}
/**
* 获取指定日期所在月份结束的时间戳
*
* @param date 指定日期
* @return
*/
public static Date getMonthEnd(Date date) {
Calendar c = Calendar.getInstance();
c.setTime(date);
// 设置为当月最后一天
c.set(Calendar.DAY_OF_MONTH, c.getActualMaximum(Calendar.DAY_OF_MONTH));
// 将小时至23
c.set(Calendar.HOUR_OF_DAY, 23);
// 将分钟至59
c.set(Calendar.MINUTE, 59);
// 将秒至59
c.set(Calendar.SECOND, 59);
// 将毫秒至999
c.set(Calendar.MILLISECOND, 999);
// 获取本月最后一天的时间戳
return c.getTime();
}
/**
* 获取最近12个月的月份
* @return list year-month
*/
public static List<String> getInitMonthMapWithZero() {
int monthNum = 12;
Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
List<String> list = getMonth(year,monthNum);
return list;
}
/**
* 返回傳入日期的前或后第n个月的日期,
* @param date 传入的时间 null则为当前时间
* @param interval 相隔月份 正数往后，负数往前
* @param formatString 时间格式
* @return 传入日期格式的时间字符串
*/
public static String getDateByMonth(Date date, int interval,String formatString) {
if(null==date){
date = getNowDate();
}
Calendar c = Calendar.getInstance();
c.setTime(date);
c.add(Calendar.MONTH, interval);
return parseDateToStr(formatString,c.getTime());
}
/**
* 功能描述:
* 获取指定日期前后第N个小时的日期
* @Param: [date, hourNum]
* @Return: java.lang.String
* @Author: Kai
* @Date: 2021/3/20 11:22
*/
public static String getBeforeHourTime(Date date,int hourNum) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.set(Calendar.HOUR_OF_DAY, calendar.get(Calendar.HOUR_OF_DAY) + hourNum);
return parseDateToStr(YYYY_MM_DD_HH_MM_SS,calendar.getTime());
}
java DateUtils
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