问题
My understanding is that .. is 0-Many args and * is one arg of any name. Is this correct?
Does aspectj support syntax like args(..,myArg,..)?
回答1:
This is from AspectJ site: http://www.eclipse.org/aspectj/doc/next/progguide/semantics-pointcuts.html
* represents any number of characters except "."
.. represents any number of characters including any number of "."
Update From AspectJ in Action - for method signatures:
In method signatures, the wildcard .. is used to denote any type and number of arguments taken by a method
* specifies a single argument
回答2:
Others have answered part of the question before me, so I will only amend:
.., bla, .. does not work because if you bind parameter bla to a variable there might be several matching combinations in case a matching type occurs multiple times in the parameter list. Example:
void foo(int a, String b, String c, File d)
Now what should happen if the advice is:
before(String bla) : call(void foo(.., bla, ..)) && args(bla)
Should bla be bound to the String value of b or c?
来源：https://stackoverflow.com/questions/12303142/what-do-and-mean-in-aspectj