/**
* 比较第一个日期是否大于第二个日期
* @param firstDate 第一个日期
* @param secondDate 第二个日期
* @return true-大于;false-不大于
*/
public static boolean localDateIsBefore(LocalDateTime firstDate, LocalDateTime secondDate) {
return firstDate.isBefore(secondDate);
}
/**
* 比较第一个日期是否小于第二个日期
* @param firstDate 第一个日期
* @param secondDate 第二个日期
* @return true-小于;false-大于
*/
public static boolean localDateIsAfter(LocalDateTime firstDate, LocalDateTime secondDate) {
return firstDate.isAfter(secondDate);
}
/**
* 得到本周周一日期
* @return
*/
public static String getWeekMonday(){
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar cal=new GregorianCalendar();
cal.setFirstDayOfWeek(Calendar.MONDAY);
cal.setTime(new Date());
cal.set(Calendar.DAY_OF_WEEK, cal.getFirstDayOfWeek());
Date first=cal.getTime();
return sdf.format(first);
}
/**
* 得到本周周五日期
* @return
*/
public String getWeekFriday(){
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar cal=new GregorianCalendar();
cal.setFirstDayOfWeek(Calendar.MONDAY);
cal.set(Calendar.DAY_OF_WEEK, cal.getFirstDayOfWeek() + 4);
Date last=cal.getTime();
return sdf.format(last);
}
/**
* 得到本周周日
*
* @return yyyy-MM-dd
*/
public static String getSundayOfThisWeek() {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Calendar c = Calendar.getInstance();
int day_of_week = c.get(Calendar.DAY_OF_WEEK) - 1;
if (day_of_week == 0)
day_of_week = 7;
c.add(Calendar.DATE, -day_of_week + 7);
return sdf.format(c.getTime());
}
/**
* 获取上周五时间
*/
public Date lastFirday() {
//作用防止周日得到本周日期
Calendar calendar = Calendar.getInstance();
while (calendar.get(Calendar.DAY_OF_WEEK) != Calendar.MONDAY) {
calendar.add(Calendar.DAY_OF_WEEK, -1);
}
int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK) - 1;
int offset = 7 - dayOfWeek;
calendar.add(Calendar.DATE, offset - 9);
return DateUtil.getFirstDayOfWeek(calendar.getTime(), 6);//这是从上周日开始数的到本周五为6
}

java获取周一,周五,周日及上周日时间
stromXu
657
2022-07-14
0