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     <a href="interceptors.html" title="back to Interceptors"><< back to Interceptors</a>

     <h1 id="i18n-interceptor">I18n Interceptor</h1>

 <h2 id="description">Description</h2>

 <p>An interceptor that handles setting the locale specified in a session as the locale for the current action request.
 In addition, this interceptor will look for a specific HTTP request parameter and set the locale to whatever value is
 provided, it also looks for specific cookie to read locale from. This means that this interceptor can be used to allow
 for your application to dynamically change the locale for the user’s session or, alternatively, only for the current
 request. This is very useful for applications that require multi-lingual support and want the user to be able to set
 his or her language preference at any point. The locale parameter is removed during the execution of this interceptor,
 ensuring that properties aren’t set on an action (such as request_locale) that have no typical corresponding setter
 in your action.</p>

 <p>For example, using the default parameter name, a request to <code class="highlighter-rouge">foo.action?request_locale=en_US</code>, then the locale for
 US English is saved in the user’s session and will be used for all future requests. If there is no locale set
 (for example with the first visit), the interceptor uses the browser locale.</p>

 <h2 id="parameters">Parameters</h2>

 <ul>
   <li><code class="highlighter-rouge">parameterName</code> (optional) - the name of the HTTP request parameter that dictates the locale to switch to and save
 in the session. By default this is <code class="highlighter-rouge">request_locale</code></li>
   <li><code class="highlighter-rouge">requestCookieParameterName</code> (optional) - the name of the HTTP request parameter that dictates the locale to switch
 to and save in a cookie. By default this is <code class="highlighter-rouge">request_cookie_locale</code></li>
   <li><code class="highlighter-rouge">requestOnlyParameterName</code> (optional) - the name of the HTTP request parameter that dictates the locale to switch to
 for the current request only, without saving it in the session. By default this is <code class="highlighter-rouge">request_only_locale</code></li>
   <li><code class="highlighter-rouge">attributeName</code> (optional) - the name of the session key to store the selected locale. By default this is <code class="highlighter-rouge">WW_TRANS_I18N_LOCALE</code></li>
   <li><code class="highlighter-rouge">localeStorage</code> (optional) - the name of storage location, it can be <code class="highlighter-rouge">accept_language</code>, <code class="highlighter-rouge">request</code>, <code class="highlighter-rouge">session</code> or <code class="highlighter-rouge">cookie</code>,
 by default this is <code class="highlighter-rouge">session</code>.</li>
   <li><code class="highlighter-rouge">supportedLocale</code> (optional) - a set of comma separated locale supported by the application, once <code class="highlighter-rouge">storage</code> is set
 to <code class="highlighter-rouge">accept_language</code>, interceptor will try to match <code class="highlighter-rouge">supportedLocale</code> with locale provided in <code class="highlighter-rouge">Accept-Language</code> header.
 Also in case of using <code class="highlighter-rouge">session</code> or <code class="highlighter-rouge">cookie</code>, interceptor will try to first match with <code class="highlighter-rouge">Accept-Language</code> header
 once <code class="highlighter-rouge">supportedLocale</code> has been defined. Since Struts 2.6.</li>
 </ul>

 <h2 id="examples">Examples</h2>

 <div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt">&lt;interceptor</span> <span class="na">name=</span><span class="s">"i18nCookie"</span> <span class="na">class=</span><span class="s">"org.apache.struts2.interceptor.I18nInterceptor"</span><span class="nt">/&gt;</span>

 <span class="nt">&lt;action</span> <span class="na">name=</span><span class="s">"someAction"</span> <span class="na">class=</span><span class="s">"com.examples.SomeAction"</span><span class="nt">&gt;</span>
     <span class="nt">&lt;interceptor-ref</span> <span class="na">name=</span><span class="s">"i18nCookie"</span><span class="nt">&gt;</span>
         <span class="nt">&lt;param</span> <span class="na">name=</span><span class="s">"localeStorage"</span><span class="nt">&gt;</span>cookie<span class="nt">&lt;/param&gt;</span>
     <span class="nt">&lt;/interceptor-ref&gt;</span>
     <span class="nt">&lt;interceptor-ref</span> <span class="na">name=</span><span class="s">"basicStack"</span><span class="nt">/&gt;</span>
     <span class="nt">&lt;result</span> <span class="na">name=</span><span class="s">"success"</span><span class="nt">&gt;</span>good_result.ftl<span class="nt">&lt;/result&gt;</span>
 <span class="nt">&lt;/action&gt;</span>
 </code></pre></div></div>

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	<a class="edit-on-gh" href="https://github.com/apache/struts-site/edit/master/source/core-developers/i18n-interceptor.md" title="Edit this page on GitHub">Edit on GitHub</a>

	<a href="interceptors.html" title="back to Interceptors"><< back to Interceptors</a>

	<h1 id="i18n-interceptor">I18n Interceptor</h1>

	<h2 id="description">Description</h2>

	<p>An interceptor that handles setting the locale specified in a session as the locale for the current action request.
	In addition, this interceptor will look for a specific HTTP request parameter and set the locale to whatever value is
	provided, it also looks for specific cookie to read locale from. This means that this interceptor can be used to allow
	for your application to dynamically change the locale for the user’s session or, alternatively, only for the current
	request. This is very useful for applications that require multi-lingual support and want the user to be able to set
	his or her language preference at any point. The locale parameter is removed during the execution of this interceptor,
	ensuring that properties aren’t set on an action (such as request_locale) that have no typical corresponding setter
	in your action.</p>

	<p>For example, using the default parameter name, a request to <code class="highlighter-rouge">foo.action?request_locale=en_US</code>, then the locale for
	US English is saved in the user’s session and will be used for all future requests. If there is no locale set
	(for example with the first visit), the interceptor uses the browser locale.</p>

	<h2 id="parameters">Parameters</h2>

	<ul>
	<li><code class="highlighter-rouge">parameterName</code> (optional) - the name of the HTTP request parameter that dictates the locale to switch to and save
	in the session. By default this is <code class="highlighter-rouge">request_locale</code></li>
	<li><code class="highlighter-rouge">requestCookieParameterName</code> (optional) - the name of the HTTP request parameter that dictates the locale to switch
	to and save in a cookie. By default this is <code class="highlighter-rouge">request_cookie_locale</code></li>
	<li><code class="highlighter-rouge">requestOnlyParameterName</code> (optional) - the name of the HTTP request parameter that dictates the locale to switch to
	for the current request only, without saving it in the session. By default this is <code class="highlighter-rouge">request_only_locale</code></li>
	<li><code class="highlighter-rouge">attributeName</code> (optional) - the name of the session key to store the selected locale. By default this is <code class="highlighter-rouge">WW_TRANS_I18N_LOCALE</code></li>
	<li><code class="highlighter-rouge">localeStorage</code> (optional) - the name of storage location, it can be <code class="highlighter-rouge">accept_language</code>, <code class="highlighter-rouge">request</code>, <code class="highlighter-rouge">session</code> or <code class="highlighter-rouge">cookie</code>,
	by default this is <code class="highlighter-rouge">session</code>.</li>
	<li><code class="highlighter-rouge">supportedLocale</code> (optional) - a set of comma separated locale supported by the application, once <code class="highlighter-rouge">storage</code> is set
	to <code class="highlighter-rouge">accept_language</code>, interceptor will try to match <code class="highlighter-rouge">supportedLocale</code> with locale provided in <code class="highlighter-rouge">Accept-Language</code> header.
	Also in case of using <code class="highlighter-rouge">session</code> or <code class="highlighter-rouge">cookie</code>, interceptor will try to first match with <code class="highlighter-rouge">Accept-Language</code> header
	once <code class="highlighter-rouge">supportedLocale</code> has been defined. Since Struts 2.6.</li>
	</ul>

	<h2 id="examples">Examples</h2>

	<div class="language-xml highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nt"><interceptor</span> <span class="na">name=</span><span class="s">"i18nCookie"</span> <span class="na">class=</span><span class="s">"org.apache.struts2.interceptor.I18nInterceptor"</span><span class="nt">/></span>

	<span class="nt"><action</span> <span class="na">name=</span><span class="s">"someAction"</span> <span class="na">class=</span><span class="s">"com.examples.SomeAction"</span><span class="nt">></span>
	<span class="nt"><interceptor-ref</span> <span class="na">name=</span><span class="s">"i18nCookie"</span><span class="nt">></span>
	<span class="nt"><param</span> <span class="na">name=</span><span class="s">"localeStorage"</span><span class="nt">></span>cookie<span class="nt"></param></span>
	<span class="nt"></interceptor-ref></span>
	<span class="nt"><interceptor-ref</span> <span class="na">name=</span><span class="s">"basicStack"</span><span class="nt">/></span>
	<span class="nt"><result</span> <span class="na">name=</span><span class="s">"success"</span><span class="nt">></span>good_result.ftl<span class="nt"></result></span>
	<span class="nt"></action></span>
	</code></pre></div></div>

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