Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: REQUIRED | OPTIONAL | DETAIL: ELEMENT

## org.springframework.beans.factory.annotation
Annotation Type Value

    @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).

Since:
  3.0
Author:
  Juergen Hoeller
See Also:
  `AutowiredAnnotationBeanPostProcessor`, `Autowired`, `BeanExpressionResolver`, `AutowireCandidateResolver.getSuggestedValue(org.springframework.beans.factory.config.DependencyDescriptor)`

Required Element Summary
`String` | `value` The actual value expression: e.g.

Element Detail

### value

    public abstract String value

  The actual value expression: e.g. "#{systemProperties.myProp}".

Overview | Package | Class | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: REQUIRED | OPTIONAL | DETAIL: ELEMENT