spring2.0 AOP举例
spring 2.0 aop 配置----解决 CGLIB2 is not availa(2008-11-06 10:22:03)转载标签：杂谈 分类：Java

Spring 2.0 aop 配置----解决 Cannot proxy target class because CGLIB2 is not available.
在lib中添加cglib-nodep-2.1_3.jar 即可！



Spring 2.0中 AOP的编程：
nested exception：该嵌套异常往往是导入包是嵌套造成的，将包remove后再重新导入
方式一：
publicclass User {
publicvoid method() {
System.out.println("in method1");
}
}
publicclass LogBean {
public Object aroundLogCalls(ProceedingJoinPoint joinPoint) throws Throwable {
System.out.println("before invoke method:"
+ joinPoint.getSignature().getName());
Object object = joinPoint.proceed();
System.out.println("after invoke method:"
+ joinPoint.getSignature().getName());
return object;
}

}
采用在xml配置aop:
<?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:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 注意上面的四个地址用空格分开 -->
<aop:config>
<!-- expression 表示要执行的匹配表达式，这里匹配所有的public方法，但是去除logger类的所有方法，防止无限调用-->

<aop:pointcut id="loggableCalls"
expression="execution(public * *(..)) "/>


<aop:aspect id="logAspect" ref="logBean">
<aop:around pointcut-ref="loggableCalls"
method="aroundLogCalls" />
</aop:aspect>

</aop:config>
<bean id="logBean" />
<bean id="user" />
方式二：
采用标注：
@Aspect
publicclass LogAspect {

@Pointcut("execution(public * *(..))")
publicvoid publicMethods() {
}
@Around("publicMethods()")
public Object aroundLogCalls(ProceedingJoinPoint joinPoint)
throws Throwable {
System.out.println("before invoke method:"
+ joinPoint.getSignature().getName());
Object object = joinPoint.proceed();
System.out.println("after invoke method:"
+ joinPoint.getSignature().getName());
return object;
}
}
<?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:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 注意上面的四个地址用空格分开 -->

<aop:aspectj-autoproxy />

<!-- 或者使用以下定义

<bean />

-->
<bean id="logAspect" />
<bean id="user" />

</beans>