AOP annotation

1.xml文件

<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/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd ">

<!--设置自动代理-->

<aop:aspectj-autoproxy />

<!-- 自动装箱扫描，检测注释的组件-->

<context:component-scan base-package="com.donghua.aop.annotation"></context:component-scan>

<!-- Aspect ，设置切面-->

<bean id="logAd" class="com.donghua.aop.annotation.LogAd" />

</beans>

2  定义切面

@Aspect
public class LogAd{

//expression格式 （修饰符类型?（问好代表可省略如：public）

　　　　　　　　　　返回值类型

　　　　　　　　　　全限定包名？

　　　　　　　　　　方法名（..） ..代表参数类型

）
@Before("execution(* *(..))")
public void before(){
System.out.println("before==========>");
}

@After("execution(public * *.save(..))")
public void after(){
System.out.println("afte==========>");
}

@AfterReturning("execution(* *(..))")
public void afterreturn(){
System.out.println("afterreturn==========>");
}

@Around("execution(* *.remove*(..))")
public void around(ProceedingJoinPoint proceed){
try{
System.out.println("around==before========>");
proceed.proceed();
System.out.println("around==after====");

}catch(Throwable e){
e.getStackTrace();
}

}

}

3 定义注释的组件

@Component("userDaoImp")
public class UserDaoImp{

public UserDaoImp(){}

public void save() {
System.out.println("save======>");

}

public void delete() {
System.out.println("delete======>");

}

public void remove() {
System.out.println("remove======>");

}

}

4.测试

public class TestAop {

private static ApplicationContext ac = new
ClassPathXmlApplicationContext("com/donghua/aop/annotation/applicationContext.xml");
@Test
public void testaop(){
UserDaoImp user = (UserDaoImp) ac.getBean("userDaoImp");
System.out.println(user.getClass());
user.delete();
user.save();
user.remove();
}
}

结果：

class com.donghua.aop.annotation.UserDaoImp$$EnhancerByCGLIB$$1cb1e29b
before==========>
delete======>
afterreturn==========>
before==========>
save======>
afte==========>
afterreturn==========>
before==========>
around==before========>
remove======>
around==after====
afterreturn==========>