Traditional Spring AOP

Get the target class from the spring container, perform AOP configuration, and let spring Create the proxy class. Fully automated process. The implementation process of traditional spring AOP

Pre-work: Add an AOP namespace

Target classes and their interfaces:

Public interface UserService {public void AddUser ();p ublic void UpdateUser ();

public class Userserviceimpl implements UserService {@Overridepublic void AddUser () {System.out.println ("Spring AOP add u Ser ");} @Overridepublic void UpdateUser () {System.out.println ("Spring AOP Update User");}}

Slice class:

public class Myaspect implements methodinterceptor{@Overridepublic Object invoke (methodinvocation mi) throws Throwable { System.out.println ("front"); Object obj = Mi.proceed (); System.out.println ("after"); return obj;}}

The focus of this blog post is on XML configuration:

<?xml version= "1.0" encoding= "UTF-8"? ><beans xmlns= "Http://www.springframework.org/schema/beans" xmlns: Xsi= "Http://www.w3.org/2001/XMLSchema-instance" xmlns:aop= "HTTP://WWW.SPRINGFRAMEWORK.ORG/SCHEMA/AOP" Xsi:sche malocation= "Http://www.springframework.org/schema/beans Http://www.springframework.org/schema/beans/spring-bean S.xsd HTTP://WWW.SPRINGFRAMEWORK.ORG/SCHEMA/AOP Http://www.springframework.org/schema/aop/spring-aop.xs D "><!--1 Create target class--><bean id=" Userserviceid "class=" COM.CANYUGAN.C_AOP. Userserviceimpl "></bean><!--2 Create a slice class (notification)--><bean id=" Myaspectid "class=" COM.CANYUGAN.C_AOP. Myaspect "></bean><!--3 Spring Traditional AOP development, make notification reference to target class Pointcut * Add AOP Namespace * AOP programming <aop:config>* &LT;AOP:POINTC Ut> is used to declare pointcuts and to determine which methods on the target class will be enhanced. ID: pointcut name expression: Used to write pointcut expressions (aspectj pointcut expressions) Execution (* com.itheima.c_aop.*.* (..)) Fixed return value type package class name Method name parameter list * <aop:advisor> special facets, only one pointcut and one notification advice-ref: a notification reference pointcut-reF: A pointcut reference--><aop:config><aop:pointcut expression= "Execution (* com.canyugan.c_aop.*.* (..))" Id= " Mypointcut "/><aop:advisor advice-ref=" Myaspectid "pointcut-ref=" Mypointcut "/></aop:config></ Beans>

Traditional Spring AOP