AOP——AOP表达式

方法签名匹配：

expression(<method scope> <return type> <fully qualified class name>.*(parametes))

• method scope: Advice will be applied to all the methods having this
  scope. For e.g., public, private, etc. Please note that Spring AOP
  only supports advising public methods.

• return type: Advice will be applied to all the methods having this
  return type.

• fully qualified class name: Advice will be applied to all the methods
  of this type. If the class and advice are in the same package then
  package name is not required

• parameters: You can also filter the method names based on the types.
  Two dots(..) means any number and type of parameters.

示例：
execution(* com.aspects.pointcut.DemoClass.*(..)) 匹配DemoClass下所有的方法。
execution(public com.aspects.pointcut.DemoClass.*(int,int)) 匹配DemoClass下public、参数为两个int的方法。

类型签名匹配：

适用于类型符合的多有joinpoint

within(type name)  

“type name”可以使包名称也可以是类名称

示例：
within(com.aspects.blog.package.*) : 匹配 com.aspects.blog.package包下所有类的所有方法。（注意：com.aspects.blog.package.abc下的类方法并不匹配）

within(com.aspects.blog.package..*) 匹配 com.aspects.blog.package包下所有类的所有方法，并且匹配其子包下所有类的所有方法。

within(com.aspects.blog.package.DemoClass) 匹配com.aspects.blog.package.DemoClass下所有方法

within(com.aspects.blog.package.DemoInterface+) : 匹配这个接口的所有实现类的所有方法

AOP表达式逻辑计算

Pointcut expressions can be combined using && (and), ||(or), and !(not).

within(com.aspects.blog.package.DemoInterface+)|| within(com.aspects.blog.package.DemoInterface2+)

匹配DemoInterface或者DemoInterface2的实现类中的所有方法

更多示例：

//the execution of any public method:execution(public * *(..))//the execution of any method with a name beginning with "set":execution(* set*(..))//the execution of any method defined by the AccountService interface:execution(* com.xyz.service.AccountService.*(..))//the execution of any method defined in the service package:execution(* com.xyz.service.*.*(..))//the execution of any method defined in the service package or a sub-package:execution(* com.xyz.service..*.*(..))//any join point (method execution only in Spring AOP) within the service package:within(com.xyz.service.*)//any join point (method execution only in Spring AOP) within the service package or a sub-package:within(com.xyz.service..*)//any join point (method execution only in Spring AOP) where the proxy implements the //AccountService interface:this(com.xyz.service.AccountService)

http://docs.spring.io/spring/docs/current/spring-framework-reference/html/aop.html