session 8 : internationalization - giáo trình bách khoa aptech

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Internationalization

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Objectives

Introduction to Internationalization Internationalization Process Internationalization Elements

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Need of Internationalization– Not all countries across the world speak or

understand English language– Symbols for currency vary across countries– Date and Time are represented differently in some

countries– Spelling also varies amongst some countries

Alternatives to Solve the Problem– Develop the entire product in the desired language– Translate the entire product in the desired

language

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The process of creating applications which can adapt and adjust to various countries, languages and regions is known as internationalization. The word “internationalization” is often abbreviated as I18N.

The process of adapting an application for a specific language or country by addition of locale-specific components and translation of text is referred to as localization. The word “localization” is often abbreviated as L10N.

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The same executable application can run worldwide

Textual elements such as labels and messages for GUI are not hard-code.

Support for new language does not require recompilation

Culturally dependent data, such as date and currency appear formats that conform.

Internationalized programs are localized quickly

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Numbers: The NumberFormat class is used to create locale-specific formats for– Numbers– Currencies– Percentages

Methods

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Date and Time: The date and time format should conform to the conventions of the end user’s locale.

The method below is used to get the DateFormat:– getDateInstance(style, locale)

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Unicode provides a unique number for every character irrespective of platform, program or language. Unicode is a 16-bit character encoding system that supports the world’s major languages. The primitive data type char in Java is based on Unicode encoding.

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1.Creating the Properties File2.Defining the Locale

– Locale(String language, String country)– Locale(String language)

3.Using the ResourceBundle class4.Fetching the Text from Resource Bundle

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I18N & Formatting Tag Library

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I18N & Formatting Tag Library

setLocale bundle setBundle message

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I18N & Formatting Tag Library

<%@ taglib uri = "http://java.sun.com/jsp/jstl/fmt" prefix = “fmt" %>

<fmt:setLocale value=“lc_CC” scope=“page | request | session | application” />

<fmt:bundle basename=“basename”>Body Content

</fmt:bundle>

<fmt:setBundle basename=“basename” var=“varName” scope=“page | request | session | application” />

<fmt:message key=“messageKey”><fmt:param />

</fmt:message>

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I18N & Formatting Tag Library– <fmt:formatNumber value=“numValue”

[type=“{number|currency|percent}”]

[maxIntegerDigits=“maxIntegerDigits”]

[minIntegerDigits=“minIntegerDigits”]

[maxFractionDigits=“maxFractionDigits”]

[minFractionDigits=“minFractionDigits”] [var=“varName”]

[scope=“{page|request|session|application}”] />

– <fmt:formatDate value=“date” [type=“{time|date|both}”]

[dateStyle=“{default|short|medium|long|full}”]

[timeStyle=“{default|short|medium|long|full}”]

[var=“varName”] [timeZone=“timeZone”]

[scope=“{page|request|session|application}”]

[pattern=“dd-MM-yy”] />

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Date – Time Pattern

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