The purpose of the `@Value` annotation in `org.springframework.beans.factory.annotation` is to inject a value into a field or method based on the Spring context after it has been established.
If the annotation does not include an expression (either Spring Expression Language or a property injection), the injected value is a simple constant that does not depend on the Spring context, making the annotation replaceable with a standard field initialization statement.
This not only implies the redundant use of `@Value`, but could also indicate an error where the expression indicators (`#`, `$`) were omitted by mistake.
This rule does not raise an issue if `@Value` is applied to a method or method argument, because the annotation has the side effect that the method is called.
- If a property is to be injected, use `${propertyName}` instead of `propertyName`.
- If a SpEL expression is to be evaluated, use `#{expression}` instead of `expression`.
- If you intend to initialize a field with a simple value or with an expression that does not depend on the Spring context, use a standard field initialization statement.
