理解切入点并访问advice中的注释参数

Question

有人能帮我理解下面AspectJ中的切入点吗？

@Target({ElementType.FIELD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
public @interface DynamicValue {
String lookupName() default "";
}

com.package.sample;
Class SampleA{

@DynamicValue("Hello")
public String greet;

//getters & setters

}

@Aspect
@Configurable
@Component
public class DynamicValueAspect
{

@Pointcut("get(@com.sample.aspect.DynamicValue java.lang.String com.package.sample..*.*)")
public void isDynamicValue() {}

@Around("isDynamicValue()")
public void getLocalized(ProceedingJoinPoint pjp) throws Throwable {
    System.out.println("Annotation called");
//How can I access the parameter in annotation here 
//i.e "Hello" from the @DynamicValue("Hello")
}

Answer 1

按以下方式更改方法签名：

@Around("isDynamicValue()")
public void getLocalized(ProceedingJoinPoint pjp, DynamicValue dynamicValue) throws Throwable {
    System.out.println(dynamic.lookupName());
}

我不太明白你是否也有问题与切入点。下面是一个应该有效的例子

@Around("execution(@com.package.sample.DynamicValue * *(..)) && @annotation(dynamicValue)")
public void isDynamicValue() {}