Dates - OmniFaces Showcase

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Available since OmniFaces 1.0

Collection of EL functions for date and time: of:formatDate(), of:formatDateWithTimezone(), of:addXxx() like of:addDays(), of:xxxBetween() like of:daysBetween(), of:getMonths(), of:getShortMonths(), of:getDaysOfWeek(), of:getShortDaysOfWeek(), of:getMonth(), of:getShortMonth(), of:getDayOfWeek() and of:getShortDayOfWeek().

Historical note: before OmniFaces 3.6, these functions accepted java.util.Date and java.util.TimeZone only. Since OmniFaces 3.6, these functions also accept java.time.Temporal and java.time.ZoneId.

Feature request

If you know more useful methods/functions which you think should be added to this OmniFaces utility class so that everyone can benefit from a "standard" Faces utility library, feel free to post a feature request.

Demo

Format current date with system default timezone: 2024-11-21 00:36:38 -06:00

Format current date with GMT timezone: 2024-11-21 06:36:38

Add 3 months to today and format it with system default timezone: 2025-02-21 00:36:38 CST

Count months between the date representing "now" and the date representing "3 months later": 3 months

Chosen month number: 1 - Name: January - Short name: Jan

Chosen day of week number: 1 - Name: Monday - Short name: Mon

Demo source code

<f:view locale="#{localeManager.language}">
    <p>
        Format current date with system default timezone:
        #{of:formatDate(now, 'yyyy-MM-dd HH:mm:ss z')}
    </p>
    <p>
        Format current date with GMT timezone:
        #{of:formatDateWithTimezone(now, 'yyyy-MM-dd HH:mm:ss', 'GMT')}
    </p>
    <p>
        <c:set var="threeMonthsLater" value="#{of:addMonths(now.zonedDateTime, 3)}" scope="request" />
        Add 3 months to today and format it with system default timezone: 
        #{of:formatDate(threeMonthsLater, 'yyyy-MM-dd HH:mm:ss z')}
    </p>
    <p>
        Count months between the date representing "now" and the date representing "3 months later": 
        #{of:monthsBetween(now, threeMonthsLater)} months
    </p>
    
    <hr />

    <p>
        <h:panelGroup id="month">
            Chosen month number:
            <strong>#{functionsBean.month}</strong>
            - Name:
            <strong>#{of:getMonth(functionsBean.month)}</strong>
            - Short name:
            <strong>#{of:getShortMonth(functionsBean.month)}</strong>
        </h:panelGroup>
    </p>
    <p>
        <h:panelGroup id="dayOfWeek">
            Chosen day of week number:
            <strong>#{functionsBean.dayOfWeek}</strong>
            - Name:
            <strong>#{of:getDayOfWeek(functionsBean.dayOfWeek)}</strong>
            - Short name:
            <strong>#{of:getShortDayOfWeek(functionsBean.dayOfWeek)}</strong>
        </h:panelGroup>
    </p>

    <h:form>
        <p>
            Get all months for the current locale:
            <h:selectOneMenu value="#{functionsBean.month}">
                <f:selectItems value="#{of:getMonths()}" />
                <f:ajax render=":month" />
            </h:selectOneMenu>
        </p>
        <p>
            Get all short months for the current locale:
            <h:selectOneMenu value="#{functionsBean.month}">
                <f:selectItems value="#{of:getShortMonths()}" />
                <f:ajax render=":month" />
            </h:selectOneMenu>
        </p>
        <p>
            Get all days of week for the current locale:
            <h:selectOneMenu value="#{functionsBean.dayOfWeek}">
                <f:selectItems value="#{of:getDaysOfWeek()}" />
                <f:ajax render=":dayOfWeek" />
            </h:selectOneMenu>
        </p>
        <p>
            Get all short days of week for the current locale:
            <h:selectOneMenu value="#{functionsBean.dayOfWeek}">
                <f:selectItems value="#{of:getShortDaysOfWeek()}" />
                <f:ajax render=":dayOfWeek" />
            </h:selectOneMenu>
        </p>
        <p>
            Switch locale and see month and day of week names changing:
            <h:selectOneMenu value="#{localeManager.language}">
                <f:selectItem itemValue="en" itemLabel="English" />
                <f:selectItem itemValue="es" itemLabel="Español (Spanish)" />
                <f:selectItem itemValue="fr" itemLabel="Français (French)" />
                <f:selectItem itemValue="de" itemLabel="Deutsch (German)" />
                <f:selectItem itemValue="nl" itemLabel="Nederlands (Dutch)" />
                <f:selectItem itemValue="ar" itemLabel="العربية (Arabic)" />
                <f:selectItem itemValue="he" itemLabel="עִבְרִית (Hebrew)" />
                <f:selectItem itemValue="zh" itemLabel="汉语 (Chinese)" />
                <f:ajax render=":demo" />
            </h:selectOneMenu>
        </p>
    </h:form>
</f:view>

package org.omnifaces.showcase.functions;

import java.io.Serializable;

import jakarta.inject.Named;

import org.omnifaces.cdi.ViewScoped;

@Named
@ViewScoped
public class FunctionsBean implements Serializable {

    private static final long serialVersionUID = 1L;

    private int day = 1;
    private int year = 2003;
    private int month = 1;
    private int dayOfWeek = 1;

    public int getDay() {
        return day;
    }

    public void setDay(int day) {
        this.day = day;
    }

    public int getYear() {
        return year;
    }

    public void setYear(int year) {
        this.year = year;
    }

    public int getMonth() {
        return month;
    }

    public void setMonth(int month) {
        this.month = month;
    }

    public int getDayOfWeek() {
        return dayOfWeek;
    }

    public void setDayOfWeek(int dayOfWeek) {
        this.dayOfWeek = dayOfWeek;
    }

}

package org.omnifaces.showcase.functions;

import java.io.Serializable;
import java.util.Locale;

import jakarta.enterprise.context.SessionScoped;
import jakarta.inject.Named;

import org.omnifaces.util.Faces;

@Named
@SessionScoped
public class LocaleManager implements Serializable {

    private static final long serialVersionUID = 1L;

    private Locale locale = Faces.getLocale();

    public Locale getLocale() {
        return locale;
    }

    public String getLanguage() {
        return locale.getLanguage();
    }

    public void setLanguage(String language) {
        locale = new Locale(language);
        Faces.setLocale(locale);
    }

}

Documentation & Sources

VDL documentation

API documentation

org.omnifaces.org.omnifaces.el.functions.Dates

Java source code

org.omnifaces.el.functions.Dates

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Feature request

VDL documentation

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Java source code

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