WebConfig.java

package com.yummynoodlebar.config;

import org.springframework.context.MessageSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.ReloadableResourceBundleMessageSource;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.LocaleResolver;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.i18n.CookieLocaleResolver;
import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
import org.thymeleaf.spring3.SpringTemplateEngine;
import org.thymeleaf.spring3.view.ThymeleafViewResolver;
import org.thymeleaf.templateresolver.ServletContextTemplateResolver;

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = {"com.yummynoodlebar.web.controller","com.yummynoodlebar.web.domain"})
public class WebConfig extends WebMvcConfigurerAdapter {
	
	@Override
	public void addResourceHandlers(ResourceHandlerRegistry registry) {
		registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
	}
	
	@Override
	public void addInterceptors(InterceptorRegistry registry) {

		LocaleChangeInterceptor localeChangeInterceptor = new LocaleChangeInterceptor();
		localeChangeInterceptor.setParamName("lang");
		registry.addInterceptor(localeChangeInterceptor);
	}
	
	@Bean
	public LocaleResolver localeResolver() {

		CookieLocaleResolver cookieLocaleResolver = new CookieLocaleResolver();
		cookieLocaleResolver.setDefaultLocale(StringUtils.parseLocaleString("en"));
		return cookieLocaleResolver;
	}

  @Bean
  public ServletContextTemplateResolver templateResolver() {
    ServletContextTemplateResolver resolver = new ServletContextTemplateResolver();
    resolver.setPrefix("/WEB-INF/views/");
    resolver.setSuffix(".html");
    //NB, selecting HTML5 as the template mode.
    resolver.setTemplateMode("HTML5");
    resolver.setCacheable(false);
    return resolver;

  }

  public SpringTemplateEngine templateEngine() {
    SpringTemplateEngine engine = new SpringTemplateEngine();
    engine.setTemplateResolver(templateResolver());
    return engine;
  }

	@Bean
	public ViewResolver viewResolver() {

    ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
		viewResolver.setTemplateEngine(templateEngine());
    viewResolver.setOrder(1);
    viewResolver.setViewNames(new String[]{"*"});
    viewResolver.setCache(false);
		return viewResolver;
	}
	
	@Bean
	public MessageSource messageSource() {

		ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
		messageSource.setBasenames("classpath:messages/messages", "classpath:messages/validation");
		// if true, the key of the message will be displayed if the key is not
		// found, instead of throwing a NoSuchMessageException
		messageSource.setUseCodeAsDefaultMessage(true);
		messageSource.setDefaultEncoding("UTF-8");
		// # -1 : never reload, 0 always reload
		messageSource.setCacheSeconds(0);
		return messageSource;
	}

}