Programming Jakarta Struts, 2nd Edition [Electronic resources] نسخه متنی

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Programming Jakarta Struts, 2nd Edition [Electronic resources] - نسخه متنی

Chuck Cavaness

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14.6 Internationalization Support with Tiles


Although the Struts framework provides
certain I18N capabilities that can be used with Tiles, Tiles also
provides the ability to select a particular tile based on the
user's locale. To support this feature in your
application, you need to create a different Tiles definition file for
each locale that you need to support. For example, if you need to
support a set of definitions for the U.S. locale and a separate set
for the German locale, you must create two separate definition files:

  • tiles-tutorial-defs_en.xml

  • tiles-tutorial-defs_de.xml


The suffix naming conventions follow the ones set by the
java.util.ResourceBundle, which is also used by
the resource bundles for Struts. When a request for a definition is
made, the correct definition is determined by the included locale.


As with regular Java resource bundles, you should always provide a
base definition that is used when no locale is provided or when an
unsupported locale is used. No language or country suffix is appended
to the name of the Tiles base definition file.

Once you have created the locale-specific definition files and placed
them in the WEB-INF directory, the only other
necessary step is to ensure that a Locale is
stored in the user's HttpSession.
The Tiles framework depends on the same Locale
instance that Struts uses to determine which definition file to use.
You will need to ensure that the Struts framework is storing the
user's Locale in the session.
This is accomplished by setting the locale
attribute to true in the
controller element. See "The
Struts Configuration DTD" in Chapter 4 for more information on the
controller element.

That's all there is to it. Note that you should
still rely on the Struts resource bundle for locale-sensitive
resources such as text, messages, and images. The I18N support in
Tiles should be used for differences in layout based on the locale.
Struts and Tiles work very well together to provide complete I18N
support.


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