java 服务的任何公共方法的 AOP 切入点表达式
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AOP pointcut expression for any public method of a service
提问by Konrad Garus
What is the simplest pointcut expression that would intercept all public methods of all beans annotated with @Service? For instance, I expect it to affect both public methods of this bean:
什么是最简单的切入点表达式，它可以拦截所有用 注释的 bean 的所有公共方法@Service？例如，我希望它影响这个 bean 的两个公共方法：
@Service
public MyServiceImpl implements MyService {
public String doThis() {...}
public int doThat() {...}
protected int doThatHelper() {...} // not wrapped
}
采纳答案by nicholas.hauschild
This documentationshould be extremely helpful.
该文档应该非常有帮助。
I would do by creating two individual point cuts, one for all public methods, and one for all classes annotated with @Service, and then create a third one that combines the pointcut expressions of the other two.
我会创建两个单独的切入点，一个用于所有公共方法，一个用于所有用@Service 注释的类，然后创建第三个结合其他两个切入点表达式的切入点。
Take a look at (7.2.3.1 Supported Pointcut Designators) for which designators to use. I think you are after 'execution' designator for finding public methods, and the 'annotation' designator for finding your annotation.
看看 ( 7.2.3.1 Supported Pointcut Designators) 使用哪些指示符。我认为您在寻找公共方法的“执行”指示符和用于查找注释的“注释”指示符之后。
Then take a look at (7.2.3.2 Combining pointcut expressions) for combining them.
然后看一下（7.2.3.2 组合切入点表达式）来组合它们。
I have provided some code below (which I have nottested). It is mostly taken from the documentation.
我在下面提供了一些代码（我没有测试过）。它主要取自文档。
@Pointcut("execution(public * *(..))") //this should work for the public pointcut
private void anyPublicOperation() {}
//@Pointcut("@annotation(Service)") this might still work, but try 'within' instead
@Pointcut("@within(Service)") //this should work for the annotation service pointcut
private void inTrading() {}
@Pointcut("anyPublicOperation() && inTrading()")
private void tradingOperation() {}
