Implementation of Spring AOP

There are two main methods: XML Schema-based setting and annotation-based setting.

Based onXML SchemaPre-notification(Currently, logbeforeadvice does not need to implement methodbeforeadvice)

Logbeforeadvice. Java

 
Public ClassLogbeforeadvice {Public VoidBefore (joinpoint) {system. Out. println (joinpoint. getsignature (). getname ()+ ", Start... logbeforeadvice");}}
 

Applicationcontext. xml

 <  Bean ID  = "Logbeforeadvice"  Class  = "Com.edu. cug. logbeforeadvice"  > </  Bean  >      <  AOP: config  >          <  AOP: Aspect  ID  = "Logbeforeaspect"  Ref  = "Logbeforeadvice" >              <  AOP: pointcut  ID  = "Logbeforepointcut"  Expression  = "Execution (* HELLO *(..))"  />              <  AOP: before  Pointcut-ref  = "Logbeforepointcut"  Method  = "Before"  />          </ AOP: Aspect  >      </  AOP: config  > 

TestProgram:

View code

Public ClassAoptest {Public Static VoidMain (string [] ARGs) {beanfactory Factory=NewClasspathxmlapplicationcontext ("Applicationcontext. xml"); Ihello Bean= (Ihello) Factory. getbean ("ihello"); Bean. hello1 ("Aop1"); Bean. hello2 ("Aop2");}}
 

Test Results

 
Hello1, start... logbeforeadvicehello1, aop1hello2, start... logbeforeadvicehello2, aop2
 

• Based onAnnotationPre-notification
• Definition aspect: Logbeforeadvice. Java

   
  @ Aspectpublic class logbeforeadvice {@ pointcut ("execution (* com.edu. cug. ihello. *(..)) ") Public void anymethod () {}@ before (" anymethod () ") Public void before (joinpoint) {system. out. println (joinpoint. getsignature (). getname () + ", start ............. logbeforeadvice ");}}
   

  Applicationcontext. xml

      bean   id  =" ihello "  class   =" com.edu. cug. ihelloimpl " >  bean  >    bean   id   =" logbeforeadvice "  class   =" com.edu. cug. logbeforeadvice " >
         bean  >    AOP: aspectj-autoproxy  />  

  Test procedure

  Aoptest. Java

   
  Public ClassAoptest {Public Static VoidMain (string [] ARGs) {beanfactory Factory=NewClasspathxmlapplicationcontext ("Applicationcontext. xml"); Ihello Bean= (Ihello) Factory. getbean ("ihello"); Bean. hello1 ("Aop1"); Bean. hello2 ("Aop2");}}
   

  Test Results

  Hello1, start... logbeforeadvicehello1, aop1hello2, start... logbeforeadvicehello2, aop2
   

  To declare pointcut in spring2.x, there are two main parts: pointcut expression (expression) and pointcut signature (signature)