JAVA-86: spring-boot-favicon

spring-boot-modules/spring-boot-basic-customization/README.md

@@ -10,3 +10,4 @@ This module contains articles about Spring Boot customization
  - [Spring Boot: Customize Whitelabel Error Page](https://www.baeldung.com/spring-boot-custom-error-page)
  - [Spring Boot: Configuring a Main Class](https://www.baeldung.com/spring-boot-main-class)
  - [How to Define a Spring Boot Filter?](https://www.baeldung.com/spring-boot-add-filter)
+ - [Guide to the Favicon in Spring Boot](https://www.baeldung.com/spring-boot-favicon)

spring-boot-modules/spring-boot-basic-customization/src/main/java/com/baeldung/favicon/FaviconApplication.java

@@ -0,0 +1,12 @@
+package com.baeldung.favicon;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class FaviconApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(FaviconApplication.class, args);
+    }
+}

spring-boot-modules/spring-boot-basic-customization/src/main/java/com/baeldung/favicon/config/FaviconConfiguration.java

@@ -0,0 +1,45 @@
+package com.baeldung.favicon.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.core.io.Resource;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.servlet.handler.SimpleUrlHandlerMapping;
+import org.springframework.web.servlet.resource.ResourceHttpRequestHandler;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+@Configuration
+public class FaviconConfiguration {
+
+    @Bean
+    public SimpleUrlHandlerMapping myFaviconHandlerMapping() {
+        SimpleUrlHandlerMapping mapping = new SimpleUrlHandlerMapping();
+        mapping.setOrder(Integer.MIN_VALUE);
+        mapping.setUrlMap(Collections.singletonMap("/favicon.ico", faviconRequestHandler()));
+        return mapping;
+    }
+
+    @Bean
+    protected ResourceHttpRequestHandler faviconRequestHandler() {
+        ResourceHttpRequestHandler requestHandler = new ResourceHttpRequestHandler();
+        ClassPathResource classPathResource = new ClassPathResource("com/baeldung/images");
+        List<Resource> locations = Arrays.asList(classPathResource);
+        requestHandler.setLocations(locations);
+        return requestHandler;
+    }
+
+    //    @Controller
+    static class FaviconController {
+
+        @RequestMapping(value = "favicon.ico", method = RequestMethod.GET)
+        @ResponseBody
+        void favicon() {
+        }
+    }
+}