Simple implementation of AOP terminology and XML in 6.Spring

1.AOP terminology

1. Joinpoint(连接点)：所谓连接点是指那些被拦截到的点。在spring中,这些点指的是方法,因为spring只支持方法类型的连接点2. Pointcut(切入点)：所谓切入点是指我们要对哪些Joinpoint进行拦截的定义3. Advice(通知/增强)：所谓通知是指拦截到Joinpoint之后所要做的事情就是通知.通知分为前置通知,后置通知,异常通知,最终通知,环绕通知(切面要完成的功能)4. Introduction(引介)：引介是一种特殊的通知在不修改类代码的前提下, Introduction可以在运行期为类动态地添加一些方法或Field5. Target(目标对象)：代理的目标对象6. Weaving(织入)：是指把增强应用到目标对象来创建新的代理对象的过程7. Proxy（代理）：一个类被AOP织入增强后，就产生一个结果代理类8. Aspect(切面)：是切入点和通知的结合，以后咱们自己来编写和配置的

2.AOP simple implementation of ASPECTJ-based XML method

1. Introduction of the JAR package

Sprig Framework foundation Package +JUNTIL Integration Pack + Log Pack +AOP package

spring的传统AOP的开发的包

　　spring-aop-4.2.4.RELEASE.jar

　　com.springsource.org.aopalliance-1.0.0.jar

aspectJ的开发包

　　com.springsource.org.aspectj.weaver-1.6.8.RELEASE.jar

　　spring-aspects-4.2.4.RELEASE.jar

2. Introduction of configuration files (AOP constraints)

 <  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:schemalocation  = "Http://www.springframework.org/schema/beans Http://www.springframework.org/sche Ma/beans/spring-beans.xsd HTTP://WWW.SPRINGFRAMEWORK.ORG/SCHEMA/AOP http://www.springframework.org/schema/aop/s Pring-aop.xsd " >  </ bean  >  

3. Create an implementation class

 Public Interface UserService {    publicvoid  Save ();          Public void update ();}

 Public class Implements userservice {    @Override    publicvoid  Save () {        //  TODO auto-generated Method Stub        System.out.println ("Save User:" );    }    @Override    publicvoid  update () {        //  TODO auto-generated method Stub        System.out.println ("Update User:" );    }}

4. Hosting the implementation class in spring

    <!---    < id = "UserService" class  = "Com.spring.demo1.UserServiceImpl"/>     

5. Defining Slice Classes

 Public class Logimpl {    publicvoid  log () {        System.out.println ("Logging ....") );    }}

6. Hosting a slice class in spring

    <!---    < id = "Logimpl" class  = "Com.spring.demo1.LogImpl"/>

7. Complete the AOP configuration in the configuration file

    <!--Configuring AOP -    <Aop:config>        <!--Configure slice classes: pointcuts and Notifications -        <Aop:aspectref= "Logimpl">            <Aop:beforeMethod= "Log"pointcut= "Execution (public void Com.spring.demo1.UserServiceImpl.save ())"/>        </Aop:aspect>            </Aop:config>

8. Writing test Code

@RunWith (Springjunit4classrunner.  Class) @ContextConfiguration ("Classpath:applicationContext.xml")Publicclass  Test1 {    @Resource (name= "UserService")    private  UserService UserService;        @Test    publicvoid  m01 () {        userservice.save ();        Userservice.update ();    }    }

Effect:

Simple implementation of AOP terminology and XML in 6.Spring