BAEL-1627 Define a favicon in spring boot (#3957)

* BAEL-1627 Define a favicon in spring boot

* Restrict favicon requests to GET only

* Update FaviconConfiguration.java

spring-rest/src/main/java/org/baeldung/config/FaviconConfiguration.java

@@ -0,0 +1,44 @@
+package org.baeldung.config;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+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.stereotype.Controller;
+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;
+
+@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/produceimage/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() {}
+    }
+}

spring-rest/src/main/resources/application.properties

@@ -1,2 +1,3 @@
 server.port= 8082
 server.servlet.context-path=/spring-rest
+spring.mvc.favicon.enabled=false