added example code for BAEL-1682

spring-boot/src/main/java/com/baeldung/errorhandling/ErrorHandlingApplication.java

@@ -0,0 +1,26 @@
+package com.baeldung.errorhandling;
+
+import com.baeldung.autoconfiguration.MySQLAutoconfiguration;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.web.servlet.handler.HandlerMappingIntrospector;
+
+@SpringBootApplication(exclude = {MySQLAutoconfiguration.class})
+@ComponentScan(basePackages = "com.baeldung.errorhandling")
+public class ErrorHandlingApplication {
+
+    public static void main(String [] args) {
+        System.setProperty("spring.profiles.active", "errorhandling");
+        SpringApplication.run(ErrorHandlingApplication.class, args);
+    }
+
+    @Bean(name = "mvcHandlerMappingIntrospector")
+    public HandlerMappingIntrospector mvcHandlerMappingIntrospector(ApplicationContext context) {
+        return new HandlerMappingIntrospector(context);
+    }
+
+
+}

spring-boot/src/main/java/com/baeldung/errorhandling/controllers/IndexController.java

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+package com.baeldung.errorhandling.controllers;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+
+@Controller
+public class IndexController {
+
+    @GetMapping(value = {"/", ""})
+    public String index() {
+        return "index";
+    }
+
+    @GetMapping(value = {"/server_error"})
+    public String triggerServerError() {
+        "ser".charAt(30);
+        return "index";
+    }
+
+    @PostMapping(value = {"/general_error"})
+    public String triggerGeneralError() {
+        return "index";
+    }
+
+}

spring-boot/src/main/java/com/baeldung/errorhandling/controllers/MyErrorController.java

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+package com.baeldung.errorhandling.controllers;
+
+import org.springframework.boot.autoconfigure.web.ErrorController;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+
+import javax.servlet.RequestDispatcher;
+import javax.servlet.http.HttpServletRequest;
+
+@Controller
+public class MyErrorController implements ErrorController {
+
+    public MyErrorController() {}
+
+    @RequestMapping(value = "/error")
+    public String handleError(HttpServletRequest request) {
+
+        Integer statusCode =
+          Integer.valueOf(request.getAttribute(RequestDispatcher.ERROR_STATUS_CODE).toString());
+
+        if(statusCode == HttpStatus.NOT_FOUND.value()) {
+            return "error-404";
+        }
+        else if(statusCode == HttpStatus.INTERNAL_SERVER_ERROR.value()) {
+            return "error-500";
+        }
+        else {
+            return "error";
+        }
+    }
+
+    @Override
+    public String getErrorPath() {
+        return "/error";
+    }
+
+}