学习札记:AOP(before、after)
学习笔记:AOP(before、after)
代码(转bea)
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<!-- mypack.MethodTracing-->
<!-- Bean configuration -->
<bean id="businesslogicbean"
class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="proxyInterfaces">
<value>mypack.IBusinessLogic</value>
</property>
<property name="target">
<ref local="beanTarget" />
</property>
<property name="interceptorNames">
<list>
<value>theTracingBeforeAdvisor</value>
<value>theTracingAfterAdvisor</value>
</list>
</property>
</bean>
<!-- Bean Classes -->
<bean id="beanTarget" class="mypack.BusinessLogic" />
<!-- Advisor pointcut definition for before advice -->
<bean id="theTracingBeforeAdvisor"
class="org.springframework.aop.support.RegexpMethodPointcutAdvisor">
<property name="advice">
<ref local="theTracingBeforeAdvice" />
</property>
<property name="pattern">
<value>.*</value>
</property>
</bean>
<!-- <value>.*</value>:该表达式选择advisor所关联到的一个或多个bean上的所有联结点。 -->
<!-- <value>./IBusinessLogic/.foo</value>:该表达式只选择IbusinessLogic接口上的foo()方法的联结点。-->
<!-- 如果是advisor所关联到的bean,则该表达式只选择IBusinessLogic接口上的联结点。 -->
<!-- Advisor pointcut definition for after advice -->
<bean id="theTracingAfterAdvisor"
class="org.springframework.aop.support.RegexpMethodPointcutAdvisor">
<property name="advice">
<ref local="theTracingAfterAdvice" />
</property>
<property name="pattern">
<value>.*</value>
</property>
</bean>
<!-- Advice classes -->
<bean id="theTracingBeforeAdvice" class="mypack.MethodTracing.TracingBeforeAdvice" />
<bean id="theTracingAfterAdvice" class="mypack.MethodTracing.TracingAfterAdvice" />
</beans>
IBusinessLogic
BusinessLogic
TracingAfterAdvice.java
TracingBeforeAdvice.java
main
代码(转bea)
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<!-- mypack.MethodTracing-->
<!-- Bean configuration -->
<bean id="businesslogicbean"
class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="proxyInterfaces">
<value>mypack.IBusinessLogic</value>
</property>
<property name="target">
<ref local="beanTarget" />
</property>
<property name="interceptorNames">
<list>
<value>theTracingBeforeAdvisor</value>
<value>theTracingAfterAdvisor</value>
</list>
</property>
</bean>
<!-- Bean Classes -->
<bean id="beanTarget" class="mypack.BusinessLogic" />
<!-- Advisor pointcut definition for before advice -->
<bean id="theTracingBeforeAdvisor"
class="org.springframework.aop.support.RegexpMethodPointcutAdvisor">
<property name="advice">
<ref local="theTracingBeforeAdvice" />
</property>
<property name="pattern">
<value>.*</value>
</property>
</bean>
<!-- <value>.*</value>:该表达式选择advisor所关联到的一个或多个bean上的所有联结点。 -->
<!-- <value>./IBusinessLogic/.foo</value>:该表达式只选择IbusinessLogic接口上的foo()方法的联结点。-->
<!-- 如果是advisor所关联到的bean,则该表达式只选择IBusinessLogic接口上的联结点。 -->
<!-- Advisor pointcut definition for after advice -->
<bean id="theTracingAfterAdvisor"
class="org.springframework.aop.support.RegexpMethodPointcutAdvisor">
<property name="advice">
<ref local="theTracingAfterAdvice" />
</property>
<property name="pattern">
<value>.*</value>
</property>
</bean>
<!-- Advice classes -->
<bean id="theTracingBeforeAdvice" class="mypack.MethodTracing.TracingBeforeAdvice" />
<bean id="theTracingAfterAdvice" class="mypack.MethodTracing.TracingAfterAdvice" />
</beans>
IBusinessLogic
public interface IBusinessLogic { public void foo(); }
BusinessLogic
public class BusinessLogic implements IBusinessLogic { public void foo() { System.out.println( "Inside BusinessLogic.foo()"); } }
TracingAfterAdvice.java
public class TracingAfterAdvice implements AfterReturningAdvice { public void afterReturning(Object arg0, Method arg1, Object[] arg2, Object arg3) throws Throwable { System.out.println( "Hello world! (by " + this.getClass().getName() + ")"); } }
TracingBeforeAdvice.java
public class TracingBeforeAdvice implements MethodBeforeAdvice { public void before(Method arg0, Object[] arg1, Object arg2) throws Throwable { System.out.println( "Hello world! (by " + this.getClass().getName() + ")"); } }
main
public class MainApplication { /** * @param args */ public static void main(String[] args) { // Read the configuration file // ApplicationContext ctx = new FileSystemXmlApplicationContext("springconfig.xml"); ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); //Instantiate an object IBusinessLogic testObject = (IBusinessLogic) ctx.getBean("businesslogicbean"); // Execute the public // method of the bean testObject.foo(); } }
1 楼
raykcn
2007-01-05
希望还有下文....
2 楼
lighter
2007-01-05
就我自身用过的情况来说.
Around处理用得比较多,before,after比较少一些
Around处理用得比较多,before,after比较少一些
3 楼
magice
2007-01-07
AOP在项目中能够适用哪些情况呢?
用在权限的鉴权方面比较好,但是acegi框架这部分已经做的很好了,所以觉得AOP的用武之地不适很多。。。
用在权限的鉴权方面比较好,但是acegi框架这部分已经做的很好了,所以觉得AOP的用武之地不适很多。。。
4 楼
piaoling
2007-01-08
想问一下Spring里面的功能,开发时能用到多少?
5 楼
magice
2007-01-08
主要还是在用IOC,使用的多了,思维模式就越来越有spring味道了,
而AOP用的地方到不是很多,因为需要用的地方-如权限,都有现成的产品可以集成-如acegi
而AOP用的地方到不是很多,因为需要用的地方-如权限,都有现成的产品可以集成-如acegi
6 楼
dzgwt2004
2007-01-08
java里面有回调函数么?
我想利用AOP是否可以实现方法的回调,就像C#里面的委托一下
不知道是否可行
我想利用AOP是否可以实现方法的回调,就像C#里面的委托一下
不知道是否可行