Classe de configuração para um projeto web com Spring sem usar Spring Boot.

WebConfig.java

package br.com.alexandreafonso.template.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.ViewResolver;
import org.thymeleaf.ITemplateEngine;
import org.thymeleaf.extras.springsecurity4.dialect.SpringSecurityDialect;
import org.thymeleaf.spring4.SpringTemplateEngine;
import org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver;
import org.thymeleaf.spring4.view.ThymeleafViewResolver;
import org.thymeleaf.templatemode.TemplateMode;
import org.thymeleaf.templateresolver.ITemplateResolver;

import nz.net.ultraq.thymeleaf.LayoutDialect;

@EnableWebMvc
@Configuration
public class WebConfig extends WebMvcConfigurerAdapter{
    
    @Autowired
    private ApplicationContext applicationContext;

	  @Override
	  public void addResourceHandlers(ResourceHandlerRegistry registry) {
		  registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
		  registry.addResourceHandler("/webjars/**").addResourceLocations("/webjars/").resourceChain(true);
    }
    
    @Bean
    public ViewResolver thymeleafViewResolver(ITemplateEngine templateEngine) {
        ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();

        viewResolver.setTemplateEngine(templateEngine);
        viewResolver.setCharacterEncoding("UTF-8");
    
        return viewResolver;
    }
    
    @Bean
    public ITemplateEngine templateEngine(ITemplateResolver templateResolver) {
        SpringTemplateEngine templateEngine = new SpringTemplateEngine();

        templateEngine.setTemplateResolver(templateResolver);
        templateEngine.setEnableSpringELCompiler(true);
        templateEngine.addDialect(new LayoutDialect());
        templateEngine.addDialect(new SpringSecurityDialect());

        return templateEngine;
    }
    
    @Bean
    public ITemplateResolver templateResolver() {
        SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver();

        templateResolver.setApplicationContext(this.applicationContext);
        templateResolver.setTemplateMode(TemplateMode.HTML);
        templateResolver.setPrefix("/WEB-INF/paginas/");
        templateResolver.setSuffix(".html");
        templateResolver.setCharacterEncoding("UTF-8");
        templateResolver.setCacheable(false);

        return templateResolver;
    }
}