Java, Spring setting up themes confusing and not working

spring-servlet.xml setting up theme beans:

<bean id="themeSource"
class="org.springframework.ui.context.support.ResourceBundleThemeSource">
    <property name="basenamePrefix" value="theme-" />  // also tried WEB-INF.resources.theme- and WEB-INF/resources/theme- here, same problem
</bean>

<bean id="themeChangeInterceptor"
    class="org.springframework.web.servlet.theme.ThemeChangeInterceptor">
    <property name="paramName" value="theme" />
</bean>

<bean id="themeResolver"
    class="org.springframework.web.servlet.theme.CookieThemeResolver">
    <property name="defaultThemeName" value="default" />
</bean>

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

under WEB-INF/resources, where are 3 theme files:

1. theme-black.properties
2. theme-blue.properties
3. theme-default.properties

each file contain this accordingly:

css=themes/black.css
css=themes/blue.css
css=themes/default.css

i have folder WEB-INF/themes , which contains 3 of these css files, i think the content of css isn't important here.

now error i run into is :

javax.servlet.ServletException: javax.servlet.jsp.JspTagException: Theme 'default': No message found under code 'css' for locale 'en'.

so basically it just can't find the css value f开发者_高级运维or themes, which means it can't find the properties file...

what I am doing wrong? feel free to ask questions

You should try to put theme properties into classpath (as is written in docs). Classpath is not /WEB-INF folder. See this question for clarity.

By default the delegate will be a org.springframework.ui.context.support.ResourceBundleThemeSource that loads properties files from the root of the classpath.

If you do don't want to put the theme.properties file under "classes" folder, you can put it under "META-INF" folder. If you use maven to create and manage the project, the "META-INF" folder is also unser the class path.

For example, if you put the themes under "META-INF/theme", you can do the following stuff to make it works.

<!-- resolves localized <theme_name>.properties files in the classpath to allow for theme support -->
<bean class="org.springframework.ui.context.support.ResourceBundleThemeSource" id="themeSource">
    <property name="basenamePrefix" value="META-INF.theme."/>
</bean>

here the problem is not with css file actually ResourcebundleThemeSource trying to find theme-default.properties file in rot of classpath .ie. under the src folder. so put your all properties file under thier, and i am sure your problem will resolve.

Are you trying to use the i18N features in your application , regarding the localization if yes, then you need to add the below code

<"bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
  <property name="basename" value="/WEB-INF/messages" />
  <property name="cacheSeconds" value="3000" />
</bean>

Otherwise remove your code <ref bean="localeChangeInterceptor" /> from the below code

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

I hope this code will work properly.....