java8时间工具类
作者：互联网
import java.text.DecimalFormat;
import java.time.*;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.temporal.TemporalAdjusters;
import java.time.temporal.WeekFields;
import java.util.Calendar;
import java.util.Date;
public class DateUtil {
// private static final DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
public static void main(String[] args) {
System.out.println(getDayFirst(new Date()));
System.out.println(getDayEnd(new Date()));
System.out.println(getDayFirstTodayEight(new Date()));
System.out.println(getMonthFirstDay());
System.out.println(getTimesMonthLastDay());
System.out.println(week(new Date()));
System.out.println(month(new Date()));
LocalDate end = LocalDate.of(2018, 12, 26);
LocalDate start = LocalDate.of(1994, 10, 28);
System.out.println(end.toEpochDay() - start.toEpochDay());
}
// 获取传入日期的初始时间
public static Date getDayFirst(Date date) {
Instant instant = date.toInstant();
ZoneId zoneId = ZoneId.systemDefault();
LocalDate localDate = instant.atZone(zoneId).toLocalDate();
LocalDateTime today_start = LocalDateTime.of(localDate, LocalTime.MIN);
ZonedDateTime zdt = today_start.atZone(zoneId);
return Date.from(zdt.toInstant());
//
}
// 获取传入日期的 8點
public static Date getDayFirstTodayEight( Date date) {
Instant instant = date.toInstant();
ZoneId zoneId = ZoneId.systemDefault();
LocalDate localDate = instant.atZone(zoneId).toLocalDate();
LocalDateTime today_start = localDate.atTime(8,0,0);
ZonedDateTime zdt = today_start.atZone(zoneId);
return Date.from(zdt.toInstant());
}
//獲取傳入日期的結束時間
public static Date getDayEnd(Date endTime) {
Instant instant = endTime.toInstant();
ZoneId zoneId = ZoneId.systemDefault();
LocalDate localDate = instant.atZone(zoneId).toLocalDate();
LocalDateTime today_start = LocalDateTime.of(localDate, LocalTime.MAX);
ZonedDateTime zdt = today_start.atZone(zoneId);
return Date.from(zdt.toInstant());
}
/**
* 计算当前时间的年份
*
* @return
*/
public static int year(Date date) {
Instant instant = date.toInstant();
ZoneId zoneId = ZoneId.systemDefault();
LocalDate localDate = instant.atZone(zoneId).toLocalDate();
return localDate.getYear();
}
//获取传入日期的月份
public static int month(Date date) {
Instant instant = date.toInstant();
ZoneId zoneId = ZoneId.systemDefault();
LocalDate localDate = instant.atZone(zoneId).toLocalDate();
return localDate.getMonth().getValue();
}
// 计算目前是一年中的第几周
public static int week(Date date) {
//
Instant instant = date.toInstant();
ZoneId zoneId = ZoneId.systemDefault();
LocalDate localDate = instant.atZone(zoneId).toLocalDate();
WeekFields weekFields = WeekFields.of(DayOfWeek.MONDAY,1);
return localDate.get(weekFields.weekOfWeekBasedYear());
}
/**
* 获取本月第一天的日期
*
* @return
*/
public static Date getMonthFirstDay() {
LocalDateTime today_start = LocalDateTime.of(LocalDate.now(), LocalTime.MIN);
LocalDateTime firstday = today_start.with(TemporalAdjusters.firstDayOfMonth());
ZoneId zoneId = ZoneId.systemDefault();
ZonedDateTime zdt = firstday.atZone(zoneId);
return Date.from(zdt.toInstant());
}
/**
* 获取本月最后一天日期
*
* @return
*/
public static Date getTimesMonthLastDay() {
LocalDateTime today_start = LocalDateTime.of(LocalDate.now(), LocalTime.MAX);
LocalDateTime firstday = today_start.with(TemporalAdjusters.lastDayOfMonth());
ZoneId zoneId = ZoneId.systemDefault();
ZonedDateTime zdt = firstday.atZone(zoneId);
return Date.from(zdt.toInstant());
}
public static Date MaxDate(Date beginDate, Date endDate) {
if (endDate.getTime() > beginDate.getTime()) {
return endDate;
} else if (endDate.getTime() < beginDate.getTime()) {
return beginDate;
}
return beginDate;
}
// /**
// * 计算2个日期之间的相差的小时数
// *
// * @param endDate
// * @param nowDate
// * @return
// */
// public static Double getDateFloat(Date endDate, Date nowDate) {
//
// long nd = 1000 * 24 * 60 * 60;
// long nh = 1000 * 60 * 60;
// long nm = 1000 * 60;
//
// long diff = 0L;
//
// if (endDate.getTime() > nowDate.getTime()) {
// diff = endDate.getTime() - nowDate.getTime();
// } else if (nowDate.getTime() > endDate.getTime()) {
// diff = nowDate.getTime() - endDate.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;
// Double a = min / 60.0;
//
//
// // 计算差多少秒,输出结果
// BigDecimal b = new BigDecimal(a);
// Double f1 = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
// return (Double) (day * 24 + hour + f1);
// }
public static String LocalDateTimeHourMinus( Date startTime, Date endTime){
ZoneId zoneId = ZoneId.systemDefault();//A time-zone ID, such as {@code Europe/Paris}.(时区)
Instant instantstart = startTime.toInstant();//An instantaneous point on the time-line.(时间线上的一个瞬时点。)
LocalDateTime startlocalDateTime = instantstart.atZone(zoneId).toLocalDateTime();
Instant instantend = endTime.toInstant();
LocalDateTime endlocalDateTime = instantend.atZone(zoneId).toLocalDateTime();
ZoneId zone = ZoneId.systemDefault();
Instant instantStart = startlocalDateTime.atZone(zone).toInstant();
Instant instantEnd = endlocalDateTime.atZone(zone).toInstant();
java.util.Date dateStart = Date.from(instantStart);
java.util.Date dateEnd = Date.from(instantEnd);
Calendar instance = Calendar.getInstance();
instance.setTime(dateStart);
long timeInMillis1 = instance.getTimeInMillis();
Calendar instance2 = Calendar.getInstance();
instance2.setTime(dateEnd);
long timeInMillis2 = instance2.getTimeInMillis();
//此处可根据自己需要来计算结果 天/时/分/秒
double hours = (timeInMillis2 - timeInMillis1)/1000/60/60.0;
DecimalFormat df = new DecimalFormat("##.#");
String dff=df.format(hours);
return dff;
}
//计算2个时间相差的 天数
public static long betweenourMinus( Date startTime, Date endTime) {
{
ZoneId zoneId = ZoneId.systemDefault();//A time-zone ID, such as {@code Europe/Paris}.(时区)
Instant instant = startTime.toInstant();//An instantaneous point on the time-line.(时间线上的一个瞬时点。)
LocalDateTime startlocalDateTime = instant.atZone(zoneId).toLocalDateTime();
Instant instantend = endTime.toInstant();//An instantaneous point on the time-line.(时间线上的一个瞬时点。)
LocalDateTime endlocalDateTime = instant.atZone(zoneId).toLocalDateTime();
LocalDateTime now = startlocalDateTime;
LocalDateTime end1 =endlocalDateTime;
Duration duration = Duration.between(now, end1);
long days = duration.toDays(); //相差的天数
long hours = duration.toHours();//相差的小时数
long minutes = duration.toMinutes();//相差的分钟数
long millis = duration.toMillis();//相差毫秒数
long nanos = duration.toNanos();//相差的纳秒数
System.out.println(now);
System.out.println(end1);
System.out.println("发送短信耗时【 " + days + "天：" + hours + " 小时：" + minutes + " 分钟：" + millis + " 毫秒：" + nanos + " 纳秒】");
return hours;
}
}
}
标签：return,atZone,ZoneId,时间,LocalDateTime,Date,工具,zoneId,java8 来源： https://blog.csdn.net/u013401913/article/details/102737298