WebConfig.java

package org.springframework.issues.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.ResourceBundleMessageSource;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
import org.springframework.web.servlet.i18n.SessionLocaleResolver;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@EnableWebMvc
@ComponentScan(basePackages="org.springframework.issues")
@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {

	@Override
	public void addViewControllers(ViewControllerRegistry registry) {
		registry.addViewController("/").setViewName("home");
	}
	
	@Bean
	public InternalResourceViewResolver viewResolver() {
		InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
		viewResolver.setPrefix("/WEB-INF/views/");
		viewResolver.setSuffix(".jsp");
		return viewResolver;
	}

	@Override
	public void addInterceptors(InterceptorRegistry registry) {
		LocaleChangeInterceptor interceptor = new LocaleChangeInterceptor();
		interceptor.setParamName("language");
		registry.addInterceptor(interceptor);
	}

	@Bean
	public SessionLocaleResolver localeResolver() {
		return new SessionLocaleResolver();
	}

	@Bean
	public ResourceBundleMessageSource messageSource() {
		ResourceBundleMessageSource source = new ResourceBundleMessageSource();
		source.setBasename("welcome");
		return source;
	}

}