expressions and notification types for 7.Spring pointcuts

1. Expressions for Pointcuts

Expression format:

Execution ([modifier] Returns a value type package name. Class Name. Method name (parameter))

Other substitutions:

<!--fully Specify a method -<!--<aop:before method= "log" pointcut= "Execution (public void Com.spring.demo1.UserServiceImpl.save ())"/>  -        <!--modifier can not be written, not necessarily appear -<!--<aop:before method= "log" pointcut= "Execution (void Com.spring.demo1.UserServiceImpl.save ())"/> -<!--The return value type must be written and can be replaced with "*" -<!--<aop:before method= "log" pointcut= "Execution (* Com.spring.demo1.UserServiceImpl.save ())"/> -<!--the package name must be written and can be replaced with "*" -<!--<aop:before method= "log" pointcut= "Execution (* *.spring.demo1.userserviceimpl.save ())"/> -<!--any package structure, "*.. * " -<!--<aop:before method= "log" pointcut= "Execution (* *). *. Userserviceimpl.save ()) "/> -<!--class must be written, can be replaced with "*" -<!--<aop:before method= "log" pointcut= "Execution (* *). *.*serviceimpl.save ()) "/> -<!--method must be written, can be replaced with "*" -<!--<aop:before method= "log" pointcut= "Execution (* *). *.*serviceimpl.save* ()) "/> -<!--parameters must be written, "*" represents a parameter, ". "represents any parameter- 
<!--<aop:before method= "log" pointcut= "Execution (* *). *.*serviceimpl.save* (..)) " /> --

2.AOP Notification Type

1. Front-facing notification
* Executed before the method of the target class executes.
* Configuration file information:

<method= "before"  pointcut-ref= "MYPOINTCUT3"/ >

* Application: Can be used to verify the parameters of the method
2. Final Notice
* After the method of the target class executes, the final notification is executed if the program has an exception.
* Write the specific configuration in the configuration file:

<method= "after"  pointcut-ref= "MYPOINTCUT3"/ >

< Span style= "COLOR: #008000" >         *   Applications: such as freeing resources
    3. Post notification
        *  method. &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP
         *  write a specific configuration in the configuration file:

 <  aop:after-returning  method  = "afterreturning"   Pointcut-ref  = "MyPointcut2"  />  

< Span style= "COLOR: #008000" > < Span style= "COLOR: #808080" >          *  Application: You can modify the return value of a method
    4. Exception throw notification
        *  notification after an exception is thrown
Span style= "COLOR: #808080" >        *  write a specific configuration in the configuration file:

 <  aop:after-throwing  method  = "afterthorwing"   Pointcut-ref  = "MyPointcut3"  />  

< Span style= "COLOR: #808080" > < Span style= "COLOR: #808080" >          *  Application: Packaging exception information
    5. Surround notification
        *  method.
        *  write a specific configuration in the configuration file:

 <  aop:around  method  = "Around"   Pointcut-ref  = "MyPointcut2"  />  

< Span style= "COLOR: #008000" > < Span style= "COLOR: #808080" > < Span style= "COLOR: #808080" >          *  Note: The target method is not executed by default and requires the Proceedingjoinpoint pair to be used for the target object's method execution.

     Public void Around (proceedingjoinpoint joinpoint) {        System.out.println ("Surround notification 1 ...");         Try {            //  manually allow the target object's method to execute             joinpoint.proceed ()        ; Catch (Throwable e) {            e.printstacktrace ();        }        System.out.println ("Surround notification 2 ...");    

How to Pass the attribute in the notification to the Pointcut ?????

How to Pass the attribute in pointcut to the notification ?????

expressions and notification types for 7.Spring pointcuts