JSTL fmt Taglib - Javascript

JSTL (JavaServer Pages Standard Tag Library) fmt Taglib is a JSP tag library for formatting and internationalization. It provides a set of tags that make it easy to format numbers, dates, times, and currencies in a consistent and configurable way.

Features

• JSTL fmt taglib provides the following tags:

  • <fmt:setLocale>: Sets the locale for subsequent operations.

  • <fmt:message>: Retrieves and formats a message from a resource bundle.

  • <fmt:formatNumber>: Formats a number according to a specified format and locale.

  • <fmt:formatDate>: Formats a date according to a specified format and locale.

  • <fmt:formatTime>: Formats a time according to a specified format and locale.

  • <fmt:formatDate>: Formats a date and time according to a specified format and locale.

• Configurable formatting patterns and properties for numbers, dates, times, and currencies.

• Support for different locales and character encodings.

Getting started

To use JSTL fmt taglib in your JSP pages, you need to perform the following steps:

1. Import the JSTL library in your JSP page using the following code snippet:

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

2. Use the <fmt:setLocale> tag to set the default locale for your application:

<fmt:setLocale value="en_US"/>

3. Use the appropriate format tags (e.g. <fmt:formatNumber>, <fmt:formatDate>, etc.) to format your data:

<fmt:formatNumber value="${price}" type="currency"/>
<fmt:formatDate value="${date}" pattern="yyyy-MM-dd"/>

Examples

Here are some examples of using JSTL fmt taglib:

Formatting numbers

<fmt:formatNumber value="${price}" type="currency"/>

This tag will format the value of the price attribute as a currency, using the default locale.

Formatting dates

<fmt:formatDate value="${date}" pattern="yyyy-MM-dd"/>

This tag will format the value of the date attribute as a date, using the pattern yyyy-MM-dd.

Retrieving messages

<fmt:message key="welcome.message"/>

This tag will retrieve and format the message with the key welcome.message from a resource bundle, using the default locale.

Conclusion

JSTL fmt taglib is a powerful and easy-to-use library for formatting and internationalizing data in JSP pages. Its flexible and configurable tags make it a popular choice among Java developers.