|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: REQUIRED | OPTIONAL | DETAIL: ELEMENT |
@Target(value={FIELD,METHOD,PARAMETER}) @Retention(value=RUNTIME) @Documented public @interface Value
Annotation at the field or method/constructor parameter level that indicates a default value expression for the affected argument.
Typically used for expression-driven dependency injection. Also supported for dynamic resolution of handler method parameters, e.g. in Spring MVC.
A common use case is to assign default field values using "#{systemProperties.myProp}" style expressions.
Note that actual processing of the @Value
annotation is performed
by a BeanPostProcessor
which in turn means that you cannot use
@Value
within
BeanPostProcessor
or BeanFactoryPostProcessor
types. Please
consult the javadoc for the AutowiredAnnotationBeanPostProcessor
class (which, by default, checks for the presence of this annotation).
AutowiredAnnotationBeanPostProcessor
,
Autowired
,
BeanExpressionResolver
,
AutowireCandidateResolver.getSuggestedValue(org.springframework.beans.factory.config.DependencyDescriptor)
Required Element Summary | |
---|---|
String |
value
The actual value expression: e.g. |
Element Detail |
---|
public abstract String value
|
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
SUMMARY: REQUIRED | OPTIONAL | DETAIL: ELEMENT |