Java LocalDateTime Format formatDateFromTo(LocalDateTime dateFrom, LocalDateTime dateTo)

Description

format Date From To

License

Open Source License

Parameter

Parameter	Description
dateFrom	LocalDateTime from.
dateTo	LocalDateTime to.

Return

Formatted string.

Declaration

public static String formatDateFromTo(LocalDateTime dateFrom, LocalDateTime dateTo) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.time.LocalDate;
import java.time.LocalDateTime;

import java.time.format.DateTimeFormatter;

import java.time.temporal.ChronoUnit;

public class Main {
    private static final String DAYS = "days";

    /**//from   w  w  w  .j a  v  a2s.  c  o  m
     * @@author A0139812A
     * Formats a start date and end date to a date range, which will display only as much info as necessary.
     * @param dateFrom   LocalDateTime from.
     * @param dateTo     LocalDateTime to.
     * @return           Formatted string.
     */
    public static String formatDateFromTo(LocalDateTime dateFrom, LocalDateTime dateTo) {
        if (dateFrom == null && dateTo == null) {
            return "";
        } else if (dateTo == null) {
            // No endDate
            return formatTime(dateFrom);
        } else if (dateFrom.isAfter(dateTo)) {
            // Unhandled error, just ignore endDate and assume it has no endDate
            return formatTime(dateFrom);
        } else if (dateFrom.toLocalDate().equals(dateTo.toLocalDate())) {
            return String.format("%s - %s", formatTime(dateFrom), formatTime(dateTo));
        } else {
            return String.format("%s - %s", formatDateTime(dateFrom), formatDateTime(dateTo));
        }
    }

    /**
     * @@author A0139812A
     * Formats a LocalDateTime to a 24-hour time.
     * 
     * @param dateTime   LocalDateTime to format.
     * @return           24-hour time formatted string.
     */
    public static String formatTime(LocalDateTime dateTime) {
        if (dateTime == null) {
            return null;
        }

        return dateTime.toLocalTime().format(DateTimeFormatter.ofPattern("HH:mm"));
    }

    /**
     * @@author A0139812A
     * Formats a LocalDateTime into short date + time format.
     * @param dateTime   LocalDateTime to format.
     * @return           Short date + time formatted string.
     */
    public static String formatDateTime(LocalDateTime dateTime) {
        return String.format("%s %s", formatShortDate(dateTime), formatTime(dateTime));
    }

    /**
     * @@author A0139812A
     * Formats a LocalDateTime to a short date. Excludes the day of week only if
     * the date is within 2-6 days from now.
     * 
     * @param dateTime   LocalDateTime to format.
     * @return           Formatted shorten day.
     */
    public static String formatShortDate(LocalDateTime dateTime) {
        if (dateTime == null) {
            return null;
        }

        LocalDate date = dateTime.toLocalDate();
        long daysDifference = LocalDate.now().until(date, ChronoUnit.DAYS);
        String dateFormat;

        // Don't show dayOfWeek for days d, such that d = {n+2,...,n+6}, where n = date now
        if (daysDifference >= 2 && daysDifference <= 6) {
            dateFormat = "dd MMM";
        } else {
            dateFormat = "E dd MMM";
        }

        return date.format(DateTimeFormatter.ofPattern(dateFormat));
    }
}

Related

1. convertTemporalToSplunkSearchFormat(OffsetDateTime localDateTime)
2. format(LocalDateTime dateTime)
3. format(LocalDateTime localDateTime, String pattern)
4. formatDate(LocalDateTime dateTime)
5. formatDate(String inPattern, LocalDateTime inTime)
6. formatDateGeneric(DateTimeFormatter dateTimeFormatter, LocalDateTime localDateTime)
7. formatDateTime(LocalDateTime dateTime)
8. formatDayOfMonth(LocalDateTime dateTime)
9. formatLocalDateTimeToString(LocalDateTime date)