国际化问题

Question

Hi all i am working on internationalization using spring mcv. But i am not able to perform language change. please help in that. here is my servlet.xml

<bean id="messageSource"
    class="org.springframework.context.support.ResourceBundleMessageSource">
    <property name="basename" value="classpath:messages" />
    <!-- <property name="defaultEncoding" value="UTF-8" /> -->
</bean>


<bean id="localeChangeInterceptor"
    class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
    <property name="paramName" value="language" />
</bean>

<bean id="localeResolver"
    class="org.springframework.web.servlet.i18n.SessionLocaleResolver">
    <property name="defaultLocale" value="en" />
</bean>

<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" >
    <property name="interceptors">
       <list>
        <ref bean="localeChangeInterceptor" />
       </list>
    </property>
</bean>

and this is my file directory structure :

and this is language selection menu :

 <span style="float: right"> <a href="?language=en">en</a> | <a href="?language=ge">ge</a> | <a href="?language=it">it</a> </span> 

please help me to solve the language selection issues why its not working to me ? please provide the suggestion.

New edited Servlet.xml

-->

<bean id="localeChangeInterceptor"
    class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
    <property name="paramName" value="language" />
</bean>

<bean id="localeResolver"
    class="org.springframework.web.servlet.i18n.SessionLocaleResolver">
    <property name="defaultLocale" value="en" />
</bean>

<bean id="handlerMapping"
    class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
    <property name="interceptors">
        <ref bean="localeChangeInterceptor" />
    </property>
</bean>

Answer 1

Couple of things,

Please use ReloadableResourceBundleMessageSource instead of ResourceBundleMessageSource

<bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource "> 
   <property name="basename" value="/WEB-INF/messages"></property>
</bean>

then you have to move your resource bundle files from current src/main/resources to your WEB-INF.

Also add relevant bundles as per your requirements like,

messages_en, messages_gt, messages_it in your WEB-INF.

EDIT :

Also I suspect that you need following,

<bean id="handlerMapping"
        class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
        <property name="interceptors">
            <ref bean="localeChangeInterceptor" />
        </property>
    </bean>

Instead of,

<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" >
    <property name="interceptors">
       <list>
        <ref bean="localeChangeInterceptor" />
       </list>
    </property>
</bean>

This is because while changing the language you are not invoking any Controller mapping. Hence it is not getting intercepted by the interceptor and your language is not getting changed.

Answer 2

Register the SessionLocaleResolver

<bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver">
        <property name="defaultLocale" value="en" />
    </bean>

Register " LocaleChangeInterceptor " interceptor, and invoke it to the handler mappings that need to support those languages

<bean id="localeChangeInterceptor" class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
        <property name="paramName" value="language" />
    </bean>

<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping" >
        <property name="interceptors">
            <list>
                <ref bean="localeChangeInterceptor" />
            </list>
        </property>
    </bean>

And (this is what you're missing)

<!-- Register the messages_.properties -->
    <bean id="messageSource"
              class="org.springframework.context.support.ResourceBundleMessageSource">
        <property name="basename" value="messages" /><!-- value="messages" as the prefix is messages_.properties -->
    </bean>

Also it's not magically translating any texts on the page you'll still need to reference the text in the .properties files, as they're the ones that will be translated:

For eg :

messages_en.properties contains :

messages.text = My name

messages_ge.properties contains

messages.text = Ich heise

Then you output this text on the target page

<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
 ...
 ...
  <h3> your message : <spring:message code="messages.text" text="default text" /> </h3>