@RequestParam and co support placeholders and expressions in their defaultValue attributes (SPR-5922); @Value expressions supported as MVC handler method arguments as well (against request scope)

org.springframework.beans/src/main/java/org/springframework/beans/factory/annotation/Value.java

@@ -25,8 +25,11 @@ import java.lang.annotation.Target;
  * Annotation at the field or method/constructor parameter level
  * that indicates a default value expression for the affected argument.
  *
- * <p>This is typically used for assigning default field values
- * with "#{systemProperties.myProp}" style expressions.
+ * <p>Typically used for expression-driven dependency injection. Also supported
+ * for dynamic resolution of handler method parameters, e.g. in Spring MVC.
+ *
+ * <p>A common use case is to assign default field values using
+ * "#{systemProperties.myProp}" style expressions.
  *
  * @author Juergen Hoeller
  * @since 3.0