BAEL-2576 - add ControllerAdvice

spring-mvc-xml/src/main/java/com/baeldung/spring/controller/ConstraintViolationExceptionHandler.java

@@ -0,0 +1,21 @@
+package com.baeldung.spring.controller;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.context.request.WebRequest;
+import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler;
+
+import javax.validation.ConstraintViolationException;
+
+@ControllerAdvice
+public class ConstraintViolationExceptionHandler extends ResponseEntityExceptionHandler {
+
+    @ExceptionHandler(value = {ConstraintViolationException.class})
+    protected ResponseEntity<Object> handleConstraintViolation(ConstraintViolationException e, WebRequest request) {
+        return handleExceptionInternal(e, e.getMessage(), new HttpHeaders(), HttpStatus.BAD_REQUEST, request);
+    }
+}
+