标签：return public date 日期 static Date 工具 Calendar
/* *
*类名：UtilDate
*详细：工具类，可以用作获取系统日期等
*说明：
*/
public class UtilDate {
/**
* 年月日时分秒(无下划线) yyyyMMddHHmmss
*/
public static final String dtLong = "yyyyMMddHHmmss";
/**
* 完整时间 yyyy-MM-dd HH:mm:ss
*/
public static final String simple = "yyyy-MM-dd HH:mm:ss";
public static final String simpleX = "yyyy/MM/dd HH:mm:ss";
/**
* 年月日(无下划线) yyyyMMdd
*/
public static final String dtShort = "yyyyMMdd";
/**
* 年月(无下划线) yyyyMM
*/
public static final String yearMonth = "yyyyMM";
/**
* 年月日(无下划线) yyyy-MM-dd
*/
public static final String simplebr = "yyyy-MM-dd";
/**
* 年月日(无下划线) yyyy/MM/dd
*/
public static final String dtShortSlash = "yyyy/MM/dd";
/**
* @return 以yyyyMMddHHmmss为格式的当前系统时间
*/
public static String getOrderNum() {
Date date = new Date();
DateFormat df = new SimpleDateFormat(dtLong);
return df.format(date);
}
/**
* @return 以yyyyMMddHHmmss为格式的指定时间
*/
public static String getOrderNum(Date date) {
if (StringUtils.isBlank(String.valueOf(date))) {
return null;
}
DateFormat df = new SimpleDateFormat(dtLong);
return df.format(date);
}
/**
* 获取系统当前日期(精确到毫秒)，格式：yyyy-MM-dd HH:mm:ss
*
* @return
*/
public static String getDateFormatter() {
Date date = new Date();
DateFormat df = new SimpleDateFormat(simple);
return df.format(date);
}
/**
* 获取指定日期(精确到毫秒)，格式：yyyy-MM-dd HH:mm:ss
*
* @return
*/
public static String getDateFormatter(Date date) {
if (StringUtils.isBlank(String.valueOf(date))) {
return null;
}
DateFormat df = new SimpleDateFormat(simple);
return df.format(date);
}
/**
* 获取系统当期年月日(精确到天)，格式：yyyyMMdd
*
* @return
*/
public static String getDate() {
Date date = new Date();
DateFormat df = new SimpleDateFormat(dtShort);
return df.format(date);
}
/**
* 获取指定年月日(精确到天)，格式：yyyyMMdd
*
* @return
*/
public static String getDate(Date date) {
if (StringUtils.isBlank(String.valueOf(date))) {
return null;
}
DateFormat df = new SimpleDateFormat(dtShort);
return df.format(date);
}
/**
* 获取系统当期年月日(精确到天)，格式：yyyy-MM-dd
*
* @return
*/
public static String getDatebr() {
Date date = new Date();
DateFormat df = new SimpleDateFormat(simplebr);
return df.format(date);
}
/**
* 获取指定年月日(精确到天)，格式：yyyy-MM-dd
*
* @return
*/
public static String getDatebr(Date date) {
if (StringUtils.isBlank(String.valueOf(date))) {
return null;
}
DateFormat df = new SimpleDateFormat(simplebr);
return df.format(date);
}
/**
* 获取系统当期年月日(精确到天)，格式：yyyy/MM/dd
*
* @return
*/
public static String dtShortSlash() {
Date date = new Date();
DateFormat df = new SimpleDateFormat(dtShort);
return df.format(date);
}
/**
* 获取指定日期年月日(精确到天)，格式：yyyy/MM/dd
*
* @return
*/
public static String dtShortSlash(Date date) {
if (StringUtils.isBlank(String.valueOf(date))) {
return null;
}
DateFormat df = new SimpleDateFormat(dtShort);
return df.format(date);
}
/**
* 获取指定日期的指定格式
*
* @return
*/
public static String getFormatDate(String formatname, Date date) {
if (StringUtils.isBlank(String.valueOf(date))) {
return null;
}
DateFormat df = new SimpleDateFormat(formatname);
return df.format(date);
}
/**
* 获取指定日期格式,指定日期的Date类型(谁调用谁处理异常问题)
*
* @return
*/
public static Date getDateForString(String formatname, String date) throws Exception {
if (StringUtils.isBlank(date)) {
return null;
}
DateFormat df = new SimpleDateFormat(formatname);
return df.parse(date);
}
/**
* 获取指定日期的Date类型(精确到秒,格式：yyyy-MM-dd HH:mm:ss)
*
* @return
*/
public static Date getDateForSimple(String date) throws Exception {
if (StringUtils.isBlank(date)) {
return null;
}
DateFormat df = new SimpleDateFormat(simple);
return df.parse(date);
}
/**
* 获取指定日期的Date类型(精确到秒,格式：yyyy/MM/dd HH:mm:ss)
*
* @return
*/
public static Date getDateForSimpleX(String date) throws Exception {
if (StringUtils.isBlank(date)) {
return null;
}
DateFormat df = new SimpleDateFormat(simpleX);
return df.parse(date);
}
/**
* 获取指定日期的Date类型(精确到秒,格式：yyyyMMddHHmmss)
*
* @return
*/
public static Date getDateForDtLong(String date) throws Exception {
if (StringUtils.isBlank(date)) {
return null;
}
DateFormat df = new SimpleDateFormat(dtLong);
return df.parse(date);
}
/**
* 获取指定日期的Date类型(精确到天,格式：yyyyMMdd)
*
* @return
*/
public static Date getDateForDtShort(String date) throws Exception {
if (StringUtils.isBlank(date)) {
return null;
}
DateFormat df = new SimpleDateFormat(dtShort);
return df.parse(date);
}
/**
* 获取指定日期的Date类型(精确到天,格式：yyyy-MM-dd)
*
* @return
*/
public static Date getDateForSimplebr(String date) throws Exception {
if (StringUtils.isBlank(date)) {
return null;
}
DateFormat df = new SimpleDateFormat(simplebr);
return df.parse(date);
}
/**
* 获取指定日期的Date类型(精确到天,格式：yyyy/MM/dd)
*
* @return
*/
public static Date getDateForDtShortSlash(String date) throws Exception {
if (StringUtils.isBlank(date)) {
return null;
}
DateFormat df = new SimpleDateFormat(dtShortSlash);
return df.parse(date);
}
/**
* 获取年月
* 如果传值就按当前值
* 若没传值按当前日期
* @param time
* @param originalFormat
* @return
*/
public static String getYearMonth(String time, String originalFormat) {
SimpleDateFormat original = new SimpleDateFormat(originalFormat);
SimpleDateFormat dateFormat = new SimpleDateFormat(yearMonth);
Date date = new Date();
if (StringUtils.isNotBlank(time)) {
try {
date = original.parse(time);
} catch (ParseException e) {
//e.printStackTrace();
}
}
return dateFormat.format(date);
}
/**
* 获取指定格式当前日期Date类型(谁调用谁处理异常问题)
*
* @return
*/
public Date getFormatDate(String formatname) throws Exception {
if (StringUtils.isBlank(formatname)) {
return null;
}
DateFormat df = new SimpleDateFormat(formatname);
return df.parse(df.format(new Date()));
}
/**
* 产生随机的三位数
*
* @return
*/
public static String getThree() {
Random rad = new Random();
return rad.nextInt(1000) + "";
}
/**
* 计算两个时间之间相差多少天多少时多少分
*
* @return
*/
public static String getDatePoor(Date startDate, Date endDate) {
long nd = 1000 * 24 * 60 * 60;//每天毫秒数
long nh = 1000 * 60 * 60;//每小时毫秒数
long nm = 1000 * 60;//每分钟毫秒数
long ns = 1000;//每秒毫秒数
long diff = endDate.getTime() - startDate.getTime(); // 获得两个时间的毫秒时间差异
long day = diff / nd; // 计算差多少天
long hour = diff % nd / nh; // 计算差多少小时
long min = diff % nd % nh / nm; // 计算差多少分钟
long sec = diff % nd % nh % nm / ns;// 计算差多少秒//输出结果
return day + "天" + hour + "小时" + min + "分钟" + sec + "秒";
}
/**
* 判读时间差距：月
*/
public static Long getMonths(Date startDate, Date endDate) {
Calendar c1 = Calendar.getInstance();
Calendar c2 = Calendar.getInstance();
c1.setTime(startDate);
c2.setTime(endDate);
if (c1.getTimeInMillis() < c2.getTimeInMillis()) {
return 0L;
}
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 (long) (yearInterval * 12 + monthInterval);
}
/**
* 判读时间差距：天
*/
public static Long getDay(Date startDate, Date endDate) {
DateFormat dateFormat = new SimpleDateFormat(simple);
Long days = null;
long diff = endDate.getTime() - startDate.getTime();
days = diff / (1000 * 60 * 60 * 24);
return days;
}
/**
* 判读时间差距：时
*/
public static Long geHour(Date startDate, Date endDate) {
DateFormat dateFormat = new SimpleDateFormat(simple);
Long hour = null;
long diff = endDate.getTime() - startDate.getTime();
hour = diff / (1000 * 60 * 60);
return hour;
}
/**
* 判读时间差距：分
*/
public static Long geMin(Date startDate, Date endDate) {
DateFormat dateFormat = new SimpleDateFormat(simple);
Long min = null;
long diff = endDate.getTime() - startDate.getTime();
min = diff / (1000 * 60);
return min;
}
/**
* 判读时间差距：秒
*/
public static Long geSec(Date startDate, Date endDate) {
DateFormat dateFormat = new SimpleDateFormat(simple);
Long seconds = null;
long diff = endDate.getTime() - startDate.getTime();
seconds = diff / (1000);
return seconds;
}
/**
* 日期相加减
*
* @param time 时间字符串 yyyy-MM-dd HH:mm:ss
* @param num 加的数，-num就是减去
* @return 减去相应的数量的年的日期
* @throws ParseException
*/
public static Date yearAddNum(Date time, Integer num) {
//SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
//Date date = format.parse(time);
Calendar calendar = Calendar.getInstance();
calendar.setTime(time);
calendar.add(Calendar.YEAR, num);
Date newTime = calendar.getTime();
return newTime;
}
/**
* @param time 时间
* @param num 加的数，-num就是减去
* @return 减去相应的数量的月份的日期
* @throws ParseException Date
*/
public static Date monthAddNum(Date time, Integer num) {
//SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
//Date date = format.parse(time);
Calendar calendar = Calendar.getInstance();
calendar.setTime(time);
calendar.add(Calendar.MONTH, num);
Date newTime = calendar.getTime();
return newTime;
}
/**
* @param time 时间
* @param num 加的数，-num就是减去
* @return 减去相应的数量的周的日期
* @throws ParseException Date
*/
public static Date weekAddNum(Date time, Integer num) {
//SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
//Date date = format.parse(time);
Calendar calendar = Calendar.getInstance();
calendar.setTime(time);
calendar.add(Calendar.WEEK_OF_MONTH, num);
Date newTime = calendar.getTime();
return newTime;
}
/**
* @param time 时间
* @param num 加的数，-num就是减去
* @return 减去相应的数量的天的日期
* @throws ParseException Date
*/
public static Date dayAddNum(Date time, Integer num) {
//SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
//Date date = format.parse(time);
Calendar calendar = Calendar.getInstance();
calendar.setTime(time);
calendar.add(Calendar.DAY_OF_MONTH, num);
Date newTime = calendar.getTime();
return newTime;
}
/**
* 获取本月第一天时间
*/
public static Date getMonthStartDate() {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_MONTH, 1);
return calendar.getTime();
}
/**
* 获取本月最后一天
*/
public static Date getMonthEndDate() {
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
return calendar.getTime();
}
/**
* 获取本周的开始时间
*/
public static Date getBeginWeekDate() {
Calendar cal = Calendar.getInstance();
cal.setTime(new Date());
int dayofweek = cal.get(Calendar.DAY_OF_WEEK);
//周日是1 ，周一是 2 ，周二是 3
//所以，当周的第一天 = 当前日期 - 距离周一过了几天（周一过了0天，周二过了1天， 周日过了6天）
// 2 - 周一的（dayofweek：2 ）= 0
// 2 - 周二的（dayofweek：3 ）= -1
// .
// .
// 2 - 周日的（dayofweek：1） = 1（这个是不符合的需要我们修改）===》2 - 周日的（dayofweek：1 ==》8 ） = -6
if (dayofweek == 1) {
dayofweek += 7;
}
cal.add(Calendar.DATE, 2 - dayofweek);
return cal.getTime();
}
/**
* 本周的结束时间
* 开始时间 + 6天
*/
public static Date getEndWeekDate() {
Calendar cal = Calendar.getInstance();
cal.setTime(new Date());
int dayofweek = cal.get(Calendar.DAY_OF_WEEK);
if (dayofweek == 1) {
dayofweek += 7;
}
cal.add(Calendar.DATE, 8 - dayofweek);//2 - dayofweek + 6
return cal.getTime();
}
/**
* @param
* @return java.util.Date
* @Description: 获取当天的开始时间
* @Add_Date: 2021-10-29 15:49
* @Modify_Date: 2021-10-29 15:49
* @MetchName: getStartDate
*/
public static Date getStartDate() {
Calendar todayStart = Calendar.getInstance();
todayStart.set(Calendar.HOUR, 0);//这里是12小时制的
todayStart.set(Calendar.MINUTE, 0);
todayStart.set(Calendar.SECOND, 0);
todayStart.set(Calendar.MILLISECOND, 0);
return todayStart.getTime();
}
public static Date getStartDate1() {
Calendar todayStart = Calendar.getInstance();
todayStart.set(Calendar.HOUR_OF_DAY,07);//这里获取的事件是24小时制的
todayStart.set(Calendar.MINUTE, 0);
todayStart.set(Calendar.SECOND, 0);
todayStart.set(Calendar.MILLISECOND, 0);
return todayStart.getTime();
}
/**
* @param
* @return java.util.Date
* @Description: 获取当天的结束时间
* @Add_Date: 2021-10-29 15:49
* @Modify_Date: 2021-10-29 15:49
* @MetchName: getStartDate
*/
public static Date getEndDate() {
Calendar todayEnd = Calendar.getInstance();
todayEnd.set(Calendar.HOUR, 23);
todayEnd.set(Calendar.MINUTE, 59);
todayEnd.set(Calendar.SECOND, 59);
todayEnd.set(Calendar.MILLISECOND, 999);
return todayEnd.getTime();
}
}
标签：return,
public,
date,
日期,
static,
Date,
工具,
Calendar
From： https://www.cnblogs.com/javaxubo/p/18525711