java-tutorials/spring-5/src/main/java/com/baeldung/sessionattrs/Config.java

package com.baeldung.sessionattrs;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;
import org.springframework.context.annotation.ScopedProxyMode;
import org.springframework.core.Ordered;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.thymeleaf.templatemode.TemplateMode;
import org.thymeleaf.templateresolver.ClassLoaderTemplateResolver;
import org.thymeleaf.templateresolver.ITemplateResolver;

@EnableWebMvc
@Configuration
public class Config implements WebMvcConfigurer {

    @Override
    public void addViewControllers(ViewControllerRegistry registry) {
        registry.addViewController("/").setViewName("index");
        registry.setOrder(Ordered.HIGHEST_PRECEDENCE);
    }

    @Bean
    @Scope(
        value = WebApplicationContext.SCOPE_SESSION, 
        proxyMode = ScopedProxyMode.TARGET_CLASS)
    public TodoList todos() {
        return new TodoList();
    }

    @Bean
    public ITemplateResolver templateResolver() {
        ClassLoaderTemplateResolver resolver 
            = new ClassLoaderTemplateResolver();
        resolver.setPrefix("templates/sessionattrs/");
        resolver.setSuffix(".html");
        resolver.setTemplateMode(TemplateMode.HTML);
        resolver.setCharacterEncoding("UTF-8");
        return resolver;
    }
}