spring-boot中@P注解的含义

Question

I have a simple and maybe stupid question so apologies in advance..

I have been reading some spring-boot java code recently I am able to understand almost all for I have been able to find documentation everywhere.. but for example for this I still can't figure out the exact meaning (I am not able to find the annotation @P ):

public MyFileEvent getEvent(
        @P("user") User user,
        @P("file") @Valid @RequestBody EventFile file) throws MyException {

    return myService.getFileEvent(file);
}

I understand @Valid and @RequestBody but I don't find the meaning of @P .

Answer 1

According to the javadoc :

"An annotation that can be used along with AnnotationParameterNameDiscoverer to specify parameter names. This is useful for interfaces prior to JDK 8 which cannot contain the parameter names."

There are in fact two versions of the @P annotation:

• org.springframework.security.access.method.P since Spring 3.2 (deprecated)
• org.springframework.security.core.parameters.P since Spring 5.0