date和localdatetime转换_date和localdatetime

 /**
* Date转换成LocalDate
* @param date
* @return
*/
public static LocalDate date2LocalDate(Date date) {
if(null == date) {
return null;
}
return date.toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
}
/**
* LocalDate转换成Date
* @param localDate
* @return
*/
public static Date localDate2Date(LocalDate localDate) {
if(null == localDate) {
return null;
}
ZonedDateTime zonedDateTime = localDate.atStartOfDay(ZoneId.systemDefault());
return Date.from(zonedDateTime.toInstant());
}
//获取月第一天
public static Date getStartDayOfMonth(String date) {
LocalDate now = LocalDate.parse(date);
return getStartDayOfMonth(now);
}
public static Date getStartDayOfMonth(LocalDate date) {
LocalDate now = date.with(TemporalAdjusters.firstDayOfMonth());
return localDate2Date(now);
}
public static Date getStartDayOfMonth() {
return getStartDayOfMonth(LocalDate.now());
}
//获取月最后一天
public static Date getEndDayOfMonth(String date) {
LocalDate localDate = LocalDate.parse(date);
return getEndDayOfMonth(localDate);
}
public static Date getEndDayOfMonth(Date date) {
return getEndDayOfMonth(date2LocalDate(date));
}
public static Date getEndDayOfMonth(LocalDate date) {
LocalDate now = date.with(TemporalAdjusters.lastDayOfMonth());
Date.from(now.atStartOfDay(ZoneId.systemDefault()).plusDays(1L).minusNanos(1L).toInstant());
return localDate2Date(now);
}
public static Date getEndDayOfMonth() {
return getEndDayOfMonth(LocalDate.now());
}
//获取周第一天
public static Date getStartDayOfWeek(String date) {
LocalDate now = LocalDate.parse(date);
return getStartDayOfWeek(now);
}
public static Date getStartDayOfWeek(TemporalAccessor date) {
TemporalField fieldISO = WeekFields.of(Locale.CHINA).dayOfWeek();
LocalDate localDate = LocalDate.from(date);
localDate = localDate.with(fieldISO, 1);
return localDate2Date(localDate);
}
//获取周最后一天
public static Date getEndDayOfWeek(String date) {
LocalDate localDate = LocalDate.parse(date);
return getEndDayOfWeek(localDate);
}
public static Date getEndDayOfWeek(TemporalAccessor date) {
TemporalField fieldISO = WeekFields.of(Locale.CHINA).dayOfWeek();
LocalDate localDate = LocalDate.from(date);
localDate = localDate.with(fieldISO, 7);
return Date.from(localDate.atStartOfDay(ZoneId.systemDefault()).plusDays(1L).minusNanos(1L).toInstant());
}
//一天的开始
public static LocalDateTime getStartOfDay(LocalDate date) {
LocalDateTime time = LocalDateTime.of(date, LocalTime.MIN);
return time;
}
public static LocalDateTime getStartOfDay() {
return getStartOfDay(LocalDate.now());
}
/**
* 一天的结束
*/
public static LocalDateTime getEndOfDay(LocalDate date) {
LocalDateTime time = LocalDateTime.of(date, LocalTime.MAX);
return time;
}
public static LocalDateTime getEndOfDay() {
return getEndOfDay(LocalDate.now());
}
//获取下个月的某一天
public static LocalDate getNextMonth(String date) {
LocalDate now = LocalDate.parse(date);
return now.minusMonths(-1);
}
//获取上个月的某一天
public static LocalDate getLastMonth(String date) {
LocalDate now = LocalDate.parse(date);
return now.minusMonths(1);
}