io.github.imsejin.common.util.DateTimeUtils Maven / Gradle / Ivy
package io.github.imsejin.common.util;
import io.github.imsejin.common.constant.DateType;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.*;
import static java.time.format.DateTimeFormatter.ofPattern;
/**
* Datetime utilities
*/
public final class DateTimeUtils {
private DateTimeUtils() {
}
/**
* Checks if it's leap year.
*
* {@code
* isLeapYear(2019); // false
* isLeapYear(2020); // true
* }
*
* @param year year you want to check
* @return the year is leap year or not
*/
public static boolean isLeapYear(int year) {
return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0;
}
/**
* Gets today's date formatted as 'yyyyMMdd'.
*
* {@code
* today(); // 20191231
* }
*
* @return today's date
*/
public static String today() {
return LocalDate.now().format(ofPattern(DateType.DATE.value()));
}
/**
* Gets today's date formatted with pattern.
*
* {@code
* today(); // 20191231
*
* today(DateType.YEAR); // 2019
* today(DateType.MONTH); // 12
* today(DateType.DAY); // 31
* today(DateType.HOUR); // 17
* today(DateType.MINUTE); // 59
* today(DateType.SECOND); // 59
* today(DateType.F_ALL); // 2019-12-31 17:59:59.723
* }
*
* @param type type of the date
* @return today's datetime formatted with pattern
*/
public static String today(DateType type) {
return LocalDateTime.now().format(ofPattern(type.value()));
}
/**
* Gets yesterday's date formatted as 'yyyyMMdd'.
*
* {@code
* today(); // 20191231
* yesterday(); // 20191230
* }
*
* @return yesterday's date
*/
public static String yesterday() {
return LocalDate.now().minusDays(1).format(ofPattern(DateType.DATE.value()));
}
/**
* Gets the corresponding element of yesterday's date formatted as 'yyyyMMdd'.
*
* {@code
* yesterday(); // 20191230
*
* yesterday(DateType.YEAR); // 2019
* yesterday(DateType.MONTH); // 12
* yesterday(DateType.DAY); // 30
* }
*
* @param type type of the date
* @return yesterday's datetime formatted with pattern
*/
public static String yesterday(DateType type) {
return LocalDateTime.now().minusDays(1).format(ofPattern(type.value()));
}
/**
* Gets the current datetime formatted as 'yyyyMMddHHmmss'.
*
* {@code
* now(); // 20191231175959
* }
*
* @return corresponding element of yesterday's datetime
*/
public static String now() {
return LocalDateTime.now().format(ofPattern(DateType.DATE_TIME.value()));
}
/**
* Check if the date is actual.
*
* (Support date formats for "yyyy-MMdd", "yyyy-MM-dd")
*
* {@code
* validate("2019-02-28"); // true
* validate("20190229"); // false
* validate("20200229"); // true
* validate("2020-02-29"); // true
* }
*
* @param date date
* @return whether the date is valid
*/
public static boolean validate(String date) {
try {
SimpleDateFormat dateFormat = new SimpleDateFormat(DateType.DATE.value());
dateFormat.setLenient(false);
dateFormat.parse(date.replace("-", ""));
return true;
} catch (ParseException ex) {
return false;
}
}
/**
* Check if the date and day of the week are actual.
*
* (Support date formats for "yyyy-MMdd", "yyyy-MM-dd")
*
* {@code
* validate("20190228", DayOfWeek.THURSDAY); // true
* validate("2019-02-28", DayOfWeek.THURSDAY); // true
* validate("20190229", DayOfWeek.FRIDAY); // false
* validate("20200229", DayOfWeek.SATURDAY); // true
* validate("2020-02-29", DayOfWeek.SATURDAY); // true
* }
*
* @param date date
* @param dayOfWeek day of week
* @return whether the date is valid
*/
public static boolean validate(String date, DayOfWeek dayOfWeek) {
// 유효한 날짜인지 확인한다
if (!validate(date)) return false;
date = date.replace("-", "");
LocalDate localDate = LocalDate.parse(date, ofPattern(DateType.DATE.value()));
// 유효한 요일인지 확인한다
return localDate.getDayOfWeek().equals(dayOfWeek);
}
/**
* Gets the last date of the year and month.
*
* {@code
* withMonthlyLastDate(2019, 2); // 20190228
* withMonthlyLastDate(2020, 2); // 20200229
* }
*
* @param year year
* @param month month
* @return last date of the year and month
*/
public static String getLastDateOfMonth(int year, int month) {
LocalDate lastDate = YearMonth.of(year, month).atEndOfMonth();
return lastDate.format(ofPattern(DateType.DATE.value()));
}
/**
* Gets the last date of the year and month.
*
* {@code
* withMonthlyLastDate(2019, Month.FEBRUARY); // 20190228
* withMonthlyLastDate(2020, Month.FEBRUARY); // 20200229
* }
*
* @param year year
* @param month month
* @return last date of the year and month
*/
public static String getLastDateOfMonth(int year, Month month) {
LocalDate lastDate = YearMonth.of(year, month).atEndOfMonth();
return lastDate.format(ofPattern(DateType.DATE.value()));
}
/**
* Gets the last date of the year and month.
*
* {@code
* withMonthlyLastDate("2019", "2"); // 20190228
* withMonthlyLastDate("2020", "2"); // 20200229
* }
*
* @param year year
* @param month month
* @return last date of the year and month
*/
public static String getLastDateOfMonth(String year, String month) {
LocalDate lastDate = YearMonth.of(Integer.parseInt(year), Integer.parseInt(month)).atEndOfMonth();
return lastDate.format(ofPattern(DateType.DATE.value()));
}
/**
* Gets the last date of the year and month.
*
* {@code
* withMonthlyLastDate("2019", Month.FEBRUARY); // 20190228
* withMonthlyLastDate("2020", Month.FEBRUARY); // 20200229
* }
*
* @param year year
* @param month month
* @return last date of the year and month
*/
public static String getLastDateOfMonth(String year, Month month) {
LocalDate lastDate = YearMonth.of(Integer.parseInt(year), month).atEndOfMonth();
return lastDate.format(ofPattern(DateType.DATE.value()));
}
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