输出内容概览
image.png
测试代码
public class HolidayTest {
private static String SOUT_DATE_FORMAT = "日期:%s\t年:%d\t月:%d\t日:%d\t天数:%d\t周数:%d\t周末:%s";
@Test
public void test() {
String dateFormat = "yyyy-MM-dd";
LocalDate localDateStart = Jdk8DateFormatter.strToLocalDate("2020-01-01", dateFormat);
LocalDate localDateEnd = Jdk8DateFormatter.strToLocalDate("2020-12-31", dateFormat);
int diff = localDateEnd.getDayOfYear() - localDateStart.getDayOfYear();
int weekOfYear = 1;
DayOfWeek dayOfWeek = localDateStart.getDayOfWeek();
String isWeekend = dayOfWeek.ordinal() > 4 ? "是" : "";
System.out.println(String.format(SOUT_DATE_FORMAT, localDateStart.format(DateTimeFormatter.ofPattern(dateFormat)),
localDateStart.getYear(), localDateStart.getMonthValue(), localDateStart.getDayOfMonth(), localDateStart.getDayOfYear(),
weekOfYear, isWeekend));
LocalDate temp = localDateStart;
for (int i = 0; i < diff; i++) {
temp = temp.plusDays(1);
dayOfWeek = temp.getDayOfWeek();
isWeekend = dayOfWeek.ordinal() > 4 ? "是" : "";
if (dayOfWeek.ordinal() == 6) {
weekOfYear++;
}
System.out.println(String.format(SOUT_DATE_FORMAT, temp.format(DateTimeFormatter.ofPattern(dateFormat)),
temp.getYear(), temp.getMonthValue(), temp.getDayOfMonth(), temp.getDayOfYear(),
weekOfYear, isWeekend));
}
}
}
JDK8日期格式化工具
/**
* 参考jdk8 doc https://docs.oracle.com/javase/tutorial/datetime/iso/period.html
* stackoverflow https://stackoverflow.com/questions/25776787/java-simpledateformat-format-issue-with-yyyy/25777559#25777559
*
* @version 0.1
* @auth amzing.
* @time 2018/8/25 12:25
* @since 0.1
*/
public class Jdk8DateFormatter {
public static String NORMAL_FORMATTER = "yyyy-MM-dd HH:mm:ss";
/**
* 标准 yyyy-MM-dd HH:mm:ss
* @param date
* @return
*/
public static String dateFormatter(Date date){
return dateFormatter(date,NORMAL_FORMATTER);
}
public static String dateFormatter(Date date,String formatter){
return dateToLocalDateTime(date).format(DateTimeFormatter.ofPattern(formatter));
}
/**
* LocalDate转date
*
* @param localDate
* @return
*/
public static Date localDateToDate(LocalDate localDate){
ZoneId zoneId = ZoneId.systemDefault();
Date result = localDateToDate(localDate,zoneId);
return result;
}
/**
* LocalDate转date
*
* @param localDate
* @param zoneId 时区
* @return
*/
public static Date localDateToDate(LocalDate localDate, ZoneId zoneId){
Date result = Date.from(localDate.atStartOfDay().atZone(zoneId).toInstant());
return result;
}
/**
* LocalDateTime转Date
*
* @param localDateTime
* @return
*/
public static Date localDateTimeToDate(LocalDateTime localDateTime){
ZoneId zoneId = ZoneId.systemDefault();
Date result = localDateTimeToDate(localDateTime,zoneId);
return result;
}
/**
* LocalDateTime转Date
*
* @param localDateTime
* @param zoneId 时区
* @return
*/
public static Date localDateTimeToDate(LocalDateTime localDateTime,ZoneId zoneId){
Date result = Date.from(localDateTime.atZone(zoneId).toInstant());
return result;
}
/**
* Date转LocalDate
*
* @param date
* @return
*/
public static LocalDate dateToLocalDate(Date date){
ZoneId zoneId = ZoneId.systemDefault();
LocalDateTime localDateTime = dateToLocalDateTime(date,zoneId);
return localDateTime.toLocalDate();
}
/**
* Date转LocalDate
*
* @param date
* @param zoneId 时区
* @return
*/
public static LocalDate dateToLocalDate(Date date,ZoneId zoneId){
LocalDateTime localDateTime = dateToLocalDateTime(date,zoneId);
return localDateTime.toLocalDate();
}
/**
* Date转LocalDateTime
*
* @param date
* @return
*/
public static LocalDateTime dateToLocalDateTime(Date date){
ZoneId zoneId = ZoneId.systemDefault();
Instant instant = date.toInstant();
LocalDateTime localDateTime = LocalDateTime.ofInstant(instant,zoneId);
return localDateTime;
}
/**
* Date转LocalDateTime
*
* @param date
* @return
*/
public static LocalDateTime dateToLocalDateTime(Date date, ZoneId zoneId){
Instant instant = date.toInstant();
LocalDateTime localDateTime = LocalDateTime.ofInstant(instant,zoneId);
return localDateTime;
}
/**
* String转LocalDate
*
* @param date
* @return
*/
public static LocalDate strToLocalDate(String date){
DateTimeFormatter formatter1 = DateTimeFormatter.BASIC_ISO_DATE;
LocalDate localDate = LocalDate.parse(date,formatter1);
return localDate;
}
/**
* String转LocalDateTime
*
* @param date
* @return
*/
public static LocalDateTime strToLocalDateTime(String date){
DateTimeFormatter formatter1 = DateTimeFormatter.ISO_DATE_TIME;
LocalDateTime localDateTime = LocalDateTime.parse(date,formatter1);
return localDateTime;
}
/**
* String转LocalDate
*
* @param date
* @param formatter
* @return
*/
public static LocalDate strToLocalDate(String date, String formatter){
DateTimeFormatter formatter1 = DateTimeFormatter.ofPattern(formatter);
LocalDate localDate = LocalDate.parse(date,formatter1);
return localDate;
}
/**
* String转LocalDateTime
*
* @param date
* @param formatter
* @return
*/
public static LocalDateTime strToLocalDateTime(String date, String formatter){
DateTimeFormatter formatter1 = DateTimeFormatter.ofPattern(formatter);
LocalDateTime localDateTime = LocalDateTime.parse(date,formatter1);
return localDateTime;
}
public static Date strToDate(String date, String formatter){
DateTimeFormatter formatter1 = DateTimeFormatter.ofPattern(formatter);
LocalDateTime localDateTime = LocalDateTime.parse(date,formatter1);
return localDateTimeToDate(localDateTime);
}
// -------------------- 两个日期相差的时间 ----------------------------------//
public static long diffSeconds(LocalDateTime start,LocalDateTime end){
return ChronoUnit.SECONDS.between(start,end);
}
public static long diffMinutes(LocalDateTime start,LocalDateTime end){
return ChronoUnit.MINUTES.between(start,end);
}
public static long diffHours(LocalDateTime start,LocalDateTime end){
return ChronoUnit.HOURS.between(start,end);
}
public static long diffDays(LocalDateTime start,LocalDateTime end){
return ChronoUnit.DAYS.between(start,end);
}
public static long diffMonths(LocalDateTime start,LocalDateTime end){
return ChronoUnit.MONTHS.between(start,end);
}
public static long diffYears(LocalDateTime start,LocalDateTime end){
return ChronoUnit.YEARS.between(start,end);
}
// -------------------- 日期加上指定时间 ----------------------------------//
public static Date plusDays(LocalDateTime dateTime,int days){
return plusDays(dateTime,days,ZoneId.systemDefault());
}
public static LocalDateTime plusDays(Date date,int days){
LocalDateTime dateTime = dateToLocalDateTime(date);
Date temp = plusDays(dateTime,days,ZoneId.systemDefault());
return dateToLocalDateTime(temp);
}
public static Date plusDays(LocalDateTime dateTime,int days,ZoneId zoneId){
LocalDateTime temp = dateTime.plusDays(days);
return localDateTimeToDate(temp,zoneId);
}
public static Date plusMonths(LocalDateTime dateTime,int months){
return plusMonths(dateTime,months,ZoneId.systemDefault());
}
public static Date plusMonths(LocalDateTime dateTime,long months,ZoneId zoneId){
LocalDateTime temp = dateTime.plusMonths(months);
return localDateTimeToDate(temp,zoneId);
}
public static Date plusYears(LocalDateTime dateTime,long years){
return plusYears(dateTime,years,ZoneId.systemDefault());
}
public static Date plusYears(LocalDateTime dateTime,long years,ZoneId zoneId){
LocalDateTime temp = dateTime.plusYears(years);
return localDateTimeToDate(temp,zoneId);
}
public static Date plusSeconds(LocalDateTime dateTime,long seconds){
return plusSeconds(dateTime,seconds,ZoneId.systemDefault());
}
public static Date plusSeconds(LocalDateTime dateTime,long seconds,ZoneId zoneId){
LocalDateTime temp = dateTime.plusSeconds(seconds);
return localDateTimeToDate(temp,zoneId);
}
public static Date plusMinutes(LocalDateTime dateTime,long minutes){
return plusMinutes(dateTime,minutes,ZoneId.systemDefault());
}
public static Date plusMinutes(Date date,long minutes){
LocalDateTime dateTime = Jdk8DateFormatter.dateToLocalDateTime(date);
return plusMinutes(dateTime,minutes,ZoneId.systemDefault());
}
public static Date plusMinutes(LocalDateTime dateTime,long minutes,ZoneId zoneId){
LocalDateTime temp = dateTime.plusMinutes(minutes);
return localDateTimeToDate(temp,zoneId);
}
public static Date plusHours(LocalDateTime dateTime,long hours){
return plusHours(dateTime,hours,ZoneId.systemDefault());
}
public static Date plusHours(LocalDateTime dateTime,long hours,ZoneId zoneId){
LocalDateTime temp = dateTime.plusHours(hours);
return localDateTimeToDate(temp,zoneId);
}
// -------------------- 日期减去指定时间 ----------------------------------//
public static Date minusSeconds(LocalDateTime dateTime,long seconds){
return minusSeconds(dateTime,seconds,ZoneId.systemDefault());
}
public static Date minusSeconds(LocalDateTime dateTime,long seconds,ZoneId zoneId){
LocalDateTime temp = dateTime.minusSeconds(seconds);
return localDateTimeToDate(temp,zoneId);
}
public static Date minusMinutes(LocalDateTime dateTime,long minutes){
return minusMinutes(dateTime,minutes,ZoneId.systemDefault());
}
public static Date minusMinutes(LocalDateTime dateTime,long minutes,ZoneId zoneId){
LocalDateTime temp = dateTime.minusMinutes(minutes);
return localDateTimeToDate(temp,zoneId);
}
public static Date minusHours(LocalDateTime dateTime,long hours){
return minusHours(dateTime,hours,ZoneId.systemDefault());
}
public static Date minusHours(LocalDateTime dateTime,long hours,ZoneId zoneId){
LocalDateTime temp = dateTime.minusHours(hours);
return localDateTimeToDate(temp,zoneId);
}
public static Date minusDays(Date date,int days){
LocalDateTime dateTime = dateToLocalDateTime(date);
return minusDays(dateTime,days);
}
public static Date minusDays(LocalDateTime dateTime,long days){
return minusDays(dateTime,days,ZoneId.systemDefault());
}
public static Date minusDays(LocalDateTime dateTime,long days,ZoneId zoneId){
LocalDateTime temp = dateTime.minusDays(days);
return localDateTimeToDate(temp,zoneId);
}
public static Date minusMonths(LocalDateTime dateTime,long months){
return minusMonths(dateTime,months,ZoneId.systemDefault());
}
public static Date minusMonths(LocalDateTime dateTime,long months,ZoneId zoneId){
LocalDateTime temp = dateTime.minusMonths(months);
return localDateTimeToDate(temp,zoneId);
}
public static Date minusYears(LocalDateTime dateTime,long years){
return minusYears(dateTime,years,ZoneId.systemDefault());
}
public static Date minusYears(LocalDateTime dateTime,long years,ZoneId zoneId){
LocalDateTime temp = dateTime.minusYears(years);
return localDateTimeToDate(temp,zoneId);
}
}