Extract code snippets from exceceptionhandlers.adoc

See gh-36175

framework-docs/modules/ROOT/pages/web/webmvc/mvc-servlet/exceptionhandlers.adoc

@@ -74,42 +74,7 @@ Servlet container makes an ERROR dispatch within the container to the configured
 to a `@Controller`, which could be implemented to return an error view name with a model
 or to render a JSON response, as the following example shows:
 
-[tabs]
-======
-Java::
-+
-[source,java,indent=0,subs="verbatim,quotes"]
-----
-	@RestController
-	public class ErrorController {
-
-		@RequestMapping(path = "/error")
-		public Map<String, Object> handle(HttpServletRequest request) {
-			Map<String, Object> map = new HashMap<>();
-			map.put("status", request.getAttribute("jakarta.servlet.error.status_code"));
-			map.put("reason", request.getAttribute("jakarta.servlet.error.message"));
-			return map;
-		}
-	}
-----
-
-Kotlin::
-+
-[source,kotlin,indent=0,subs="verbatim,quotes"]
-----
-	@RestController
-	class ErrorController {
-
-		@RequestMapping(path = ["/error"])
-		fun handle(request: HttpServletRequest): Map<String, Any> {
-			val map = HashMap<String, Any>()
-			map["status"] = request.getAttribute("jakarta.servlet.error.status_code")
-			map["reason"] = request.getAttribute("jakarta.servlet.error.message")
-			return map
-		}
-	}
-----
-======
+include-code::./ErrorController[tag=snippet,indent=0]
 
 TIP: The Servlet API does not provide a way to create error page mappings in Java. You can,
 however, use both a `WebApplicationInitializer` and a minimal `web.xml`.

framework-docs/src/main/java/org/springframework/docs/web/webmvc/mvcservlet/mvcanncustomerservletcontainererrorpage/ErrorController.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2002-2025 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.docs.web.webmvc.mvcservlet.mvcanncustomerservletcontainererrorpage;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import jakarta.servlet.http.HttpServletRequest;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+// tag::snippet[]
+@RestController
+public class ErrorController {
+
+	@RequestMapping(path = "/error")
+	public Map<String, Object> handle(HttpServletRequest request) {
+		Map<String, Object> map = new HashMap<>();
+		map.put("status", request.getAttribute("jakarta.servlet.error.status_code"));
+		map.put("reason", request.getAttribute("jakarta.servlet.error.message"));
+		return map;
+	}
+}
+// end::snippet[]

framework-docs/src/main/kotlin/org/springframework/docs/web/webmvc/mvcservlet/mvcanncustomerservletcontainererrorpage/ErrorController.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2002-2025 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.docs.web.webmvc.mvcservlet.mvcanncustomerservletcontainererrorpage
+
+import jakarta.servlet.http.HttpServletRequest
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+
+// tag::snippet[]
+@RestController
+class ErrorController {
+
+	@RequestMapping(path = ["/error"])
+	fun handle(request: HttpServletRequest): Map<String, Any> {
+		val map = HashMap<String, Any>()
+		map["status"] = request.getAttribute("jakarta.servlet.error.status_code")!!
+		map["reason"] = request.getAttribute("jakarta.servlet.error.message")!!
+		return map
+	}
+}
+// end::snippet[]