我需要一个 Spring AOP 切入点解释 [英] I need a Spring AOP pointcut explanation

问题描述

我见过两种切入点模式的变体:

I have seen two variations of pointcut patterns:

这个

execution(* some.package.*.*(..))

还有这个

execution(* some.package.* *(..))

最后两个 * 之间的点(或没有点)是什么意思?

What is the meaning of the dot (or of it absence) between the last two *'s?

推荐答案

这个 附录 定义了切入点表达式语言的语法.对于执行表达式，规则如下:

This appendix defines grammar of the pointcut expression langauge. For the execution expression the rule is the following:

execution(MethodPattern)

哪里

MethodPattern = 
  [ModifiersPattern] TypePattern 
        [TypePattern . ] IdPattern (TypePattern | ".." , ... ) 
        [ throws ThrowsPattern ]

这意味着如果你在("之前有3个表达式(用空格分隔)，那么第一个是修饰符，第二个是类，第三个是方法名.但是如果你在("之前有2个表达式，那么第一个会是类，第二个是方法名.

That means that if you have 3 expressions (separated by space) before "(", then the first is modifier, second is class and third is method name. But if you have 2 expressions before "(", then first will be class and second will be method name.

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