JAVA-14723 Convert spring-mvc-basics-4 to Spring Boot project and upd… (#13399)

* JAVA-14723 Convert spring-mvc-basics-4 to Spring Boot project and update articles

* JAVA-14723 Refactoring and remove unused files

* JAVA-14723 remove the WEB-INF and migrate jsp to html

* JAVA-14723 Add back the removed test and rename the test into: ArticleViewerControllerWithRequiredAttributeIntegrationTest

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Co-authored-by: timis1 <noreplay@yahoo.com>

spring-web-modules/spring-mvc-basics-4/src/main/java/com/baeldung/config/WebConfig.java

@@ -0,0 +1,87 @@
+package com.baeldung.config;
+
+import org.springframework.boot.web.server.WebServerFactoryCustomizer;
+import org.springframework.boot.web.servlet.server.ConfigurableServletWebServerFactory;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.ViewResolver;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.view.InternalResourceViewResolver;
+import org.springframework.web.servlet.view.JstlView;
+import org.thymeleaf.spring5.SpringTemplateEngine;
+import org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver;
+import org.thymeleaf.spring5.view.ThymeleafViewResolver;
+import org.thymeleaf.templatemode.TemplateMode;
+import org.thymeleaf.templateresolver.ClassLoaderTemplateResolver;
+import org.thymeleaf.templateresolver.ITemplateResolver;
+
+import com.baeldung.contexts.Greeting;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+/**
+ * Web Configuration for the entire app
+ */
+@Configuration
+@EnableWebMvc
+public class WebConfig {
+
+    @Bean
+    public WebServerFactoryCustomizer<ConfigurableServletWebServerFactory> enableDefaultServlet() {
+        return factory -> factory.setRegisterDefaultServlet(true);
+    }
+
+    @Bean
+    public Greeting greeting() {
+        Greeting greeting = new Greeting();
+        greeting.setMessage("Hello World !!");
+        return greeting;
+    }
+
+    @Bean
+    public ObjectMapper objectMapper() {
+        return new ObjectMapper();
+    }
+
+    // Thymeleaf configuration
+    @Bean
+    public ViewResolver thymeleafViewResolver() {
+
+        ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
+
+        viewResolver.setTemplateEngine(thymeleafTemplateEngine());
+        viewResolver.setCharacterEncoding("UTF-8");
+        viewResolver.setOrder(0);
+
+        return viewResolver;
+    }
+
+    // Thymeleaf template engine with Spring integration
+    @Bean
+    public SpringTemplateEngine thymeleafTemplateEngine() {
+
+        SpringTemplateEngine templateEngine = new SpringTemplateEngine();
+        templateEngine.setTemplateResolver(thymeleafTemplateResolver());
+        templateEngine.setEnableSpringELCompiler(true);
+
+        return templateEngine;
+    }
+
+    @Bean
+    public SpringResourceTemplateResolver springResourceTemplateResolver() {
+        return new SpringResourceTemplateResolver();
+    }
+
+    @Bean
+    public ITemplateResolver thymeleafTemplateResolver() {
+
+        ClassLoaderTemplateResolver templateResolver = new ClassLoaderTemplateResolver();
+
+        templateResolver.setPrefix("/templates/");
+        templateResolver.setCacheable(false);
+        templateResolver.setSuffix(".html");
+        templateResolver.setTemplateMode(TemplateMode.HTML);
+        templateResolver.setCharacterEncoding("UTF-8");
+
+        return templateResolver;
+    }
+}