Spring AOP：如何获取建议方法的注释 [英] Spring AOP: how to get the annotations of the adviced method

问题描述

我想用Spring / AOP和注释实现声明性安全性。
正如您在下一个代码示例中看到的，我有限制注释，参数allowedRoles用于定义允许执行推荐方法的人。

I'd like to implement declarative security with Spring/AOP and annotations. As you see in the next code sample I have the Restricted Annotations with the paramter "allowedRoles" for defining who is allowed to execute an adviced method.

    @Restricted(allowedRoles="jira-administrators")
        public void setPassword(...) throws UserMgmtException {             
               // set password code
               ...
        }

现在，问题是在我的建议中我无法访问定义的内容注释：

Now, the problem is that in my Advice I have no access to the defined Annotations:

public Object checkPermission(ProceedingJoinPoint pjp) throws Throwable {

    Signature signature = pjp.getSignature();
    System.out.println("Allowed:" + rolesAllowedForJoinPoint(pjp));
            ...
}

private Restricted rolesAllowedForJoinPoint(ProceedingJoinPoint thisJoinPoint)
        {
            MethodSignature methodSignature = (MethodSignature) thisJoinPoint.getSignature();
            Method targetMethod = methodSignature.getMethod();

            return targetMethod.getAnnotation(Restricted.class);
        }

上述方法始终返回null（根本没有找到注释）。
有一个简单的解决方案吗？

The method above always returns null (there are no annotations found at all). Is there a simple solution to this?

我读了一些关于使用AspectJ代理的内容，但我不想使用这个代理。

I read something about using the AspectJ agent but I would prefer not to use this agent.

推荐答案

我假设 @Restricted 是你的注释。如果是这种情况，请确保您拥有：

I assume @Restricted is your annotation. If that is the case, make sure you have:

@Retention(RetentionPolicy.RUNTIME)

。这意味着注释在运行时保留。

in your annotation definition. This means that the annotation is retained at runtime.

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