Merge branch '5.1.x'

spring-core/src/main/java/org/springframework/util/ReflectionUtils.java

@@ -527,16 +527,8 @@ public abstract class ReflectionUtils {
 	 * Determine whether the given method is originally declared by {@link java.lang.Object}.
 	 */
 	public static boolean isObjectMethod(@Nullable Method method) {
-		if (method == null) {
-			return false;
-		}
-		try {
-			Object.class.getDeclaredMethod(method.getName(), method.getParameterTypes());
-			return true;
-		}
-		catch (Exception ex) {
-			return false;
-		}
+		return (method != null && (method.getDeclaringClass() == Object.class ||
+				isEqualsMethod(method) || isHashCodeMethod(method) || isToStringMethod(method)));
 	}
 
 	/**