Following example will show how to customize ThemeResolver. We are still going to use FixedThemeResolver (used by default as well) but with a different theme name.
Example
Java Config class
DispatcherServlet looks for user configured ThemeResolver bean by a specific name as defined by DispatcherServlet.THEME_RESOLVER_BEAN_NAME before falling back to the default one:
@EnableWebMvc
@Configuration
@ComponentScan
public class MyWebConfig implements WebMvcConfigurer {
@Bean(DispatcherServlet.THEME_RESOLVER_BEAN_NAME)
public ThemeResolver customThemeResolver() {
FixedThemeResolver fixedThemeResolver = new FixedThemeResolver();
fixedThemeResolver.setDefaultThemeName("app-theme");
return fixedThemeResolver;
}
@Override
public void addViewControllers(ViewControllerRegistry registry) {
//mapping '/' to index view name without a controller
ViewControllerRegistration r = registry.addViewController("/");
r.setViewName("index");
}
@Override
public void configureViewResolvers(ViewResolverRegistry registry) {
registry.jsp();//default prefix=/WEB-INF/", suffix=".jsp"
}
}
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<html>
<body style="background-color:<spring:theme code='background'/>;">
<div style="<spring:theme code='content-style'/>">
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Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante.
Donec eu libero sit amet quam egestas semper. Aenean ultricies
mi vitae est. Mauris placerat eleifend leo.
</div>
</body>
</html>
To try examples, run embedded tomcat (configured in pom.xml of example project below):
mvn tomcat7:run-war
Output
Example Project
Dependencies and Technologies Used:
spring-webmvc 5.0.2.RELEASE: Spring Web MVC.
javax.servlet-api 3.1.0 Java Servlet API
JDK 1.8
Maven 3.3.9
Spring MVC Customizing theme name with FixedThemeResolver
