AspectJ-----XML

青旅半醒 2023-06-08 04:42 4阅读 0赞

UserDao: 实体接口类

package com.student.jdk;
    
    public interface UserDao {
    	public void addUser(); 
    	public void deleteUser();
    }

实体类

package com.student.jdk;
    
    public class UserDaoImpl implements UserDao {
    
    	@Override
    	public void addUser() {
    		System.out.println("添加用户！！！!");
    
    	}
    
    	@Override
    	public void deleteUser() {
    	System.out.println("删除用户！！！！");
    
    	}
    
    }

切面类：

package com.student.aspectj.xml;
    
    import org.aspectj.lang.JoinPoint;
    import org.aspectj.lang.ProceedingJoinPoint;
    
    public class MyAspect {
    	//前置通知
    	public void myBefore(JoinPoint joinPoint)
    	{
    		System.out.print("正在执行前置通知！！！，权限检查中....");
    		System.out.print("目标类是："+joinPoint.getTarget());
    		System.out.println("，被植入的目标方法是："+joinPoint.getSignature().getName());
    	}
    	//后置通知
    	public void myAfterReturning(JoinPoint joinPoint)
    	{
    		System.out.print("正在执行后置通知！！！，记录日志中....");
    		System.out.println("，被植入的目标方法是："+joinPoint.getSignature().getName());
    	}
    	//环绕通知
    	public Object myAround(ProceedingJoinPoint proceedingJoinPoint) throws Throwable
    	{
    		System.out.println("正在执行环绕通知！！！，模拟开启事务中...");
    		Object obj = proceedingJoinPoint.proceed();
    		System.out.println("环绕结束，模拟关闭事物中...");
    		return obj;
    	}
    	//异常通知
    	public void myAfterThrowing(JoinPoint joinPoint,Throwable e) 
    	{
    		System.out.println("异常通知："+e.getMessage());
    	}
    	//最终通知
    	public void myAfter()
    	{
    		System.out.println("最终通知：释放资源...");
    	}
    }

配置文件：

<?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">
    
        <bean id="userDao" class="com.student.jdk.UserDaoImpl"></bean>
    	<bean id="myAspect" class="com.student.aspectj.xml.MyAspect"></bean>
    	<aop:config>
    		<aop:aspect ref="myAspect">
    			<aop:pointcut expression="execution(* com.student.jdk.*.*(..))" id="myPointCut"/>
    			<aop:before method="myBefore" pointcut-ref="myPointCut"/>
    			<aop:after-returning method="myAfterReturning" pointcut-ref="myPointCut" returning="returnVal"/>
    			<aop:around method="myAround" pointcut-ref="myPointCut"/>
    			<aop:after-throwing method="myAfterThrowing" pointcut-ref="myPointCut" throwing="e"/>
    			<aop:after method="myAfter" pointcut-ref="myPointCut"/>
    		</aop:aspect>
    	</aop:config>
    </beans>

测试类：

package com.student.aspectj.xml;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    import com.student.jdk.UserDao;
    
    public class TestXmlAspectj {
    
    	public static void main(String[] args) {
    		String xmlPath = "com/student/aspectj/xml/applictionContext.xml";
    		ApplicationContext applicationContext = new ClassPathXmlApplicationContext(xmlPath);
    		UserDao userDao = (UserDao) applicationContext.getBean("userDao");
    		userDao.addUser();
    	}
    
    }

运行结果：

十月 16, 2019 11:36:30 上午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
    信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@69d0a921: startup date [Wed Oct 16 11:36:30 CST 2019]; root of context hierarchy
    十月 16, 2019 11:36:30 上午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
    信息: Loading XML bean definitions from class path resource [com/student/aspectj/xml/applictionContext.xml]
    正在执行前置通知！！！，权限检查中....目标类是：com.student.jdk.UserDaoImpl@2aa5fe93，被植入的目标方法是：addUser
    正在执行环绕通知！！！，模拟开启事务中...
    添加用户！！！!
    最终通知：释放资源...
    环绕结束，模拟关闭事物中...
    正在执行后置通知！！！，记录日志中....，被植入的目标方法是：addUser

修改最终通知：

//最终通知
    	public void myAfter()
    	{
    		System.out.println("最终通知：释放资源...");
    		int b=10/0;
    	}

运行结果:

十月 16, 2019 11:43:56 上午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
    信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@69d0a921: startup date [Wed Oct 16 11:43:56 CST 2019]; root of context hierarchy
    十月 16, 2019 11:43:56 上午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
    信息: Loading XML bean definitions from class path resource [com/student/aspectj/xml/applictionContext.xml]
    正在执行前置通知！！！，权限检查中....目标类是：com.student.jdk.UserDaoImpl@2aa5fe93，被植入的目标方法是：addUser
    正在执行环绕通知！！！，模拟开启事务中...
    添加用户！！！!
    最终通知：释放资源...
    异常通知：/ by zero
    Exception in thread "main" java.lang.ArithmeticException: / by zero
    	at com.student.aspectj.xml.MyAspect.myAfter(MyAspect.java:37)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    	at java.lang.reflect.Method.invoke(Unknown Source)
    	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:629)
    	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:611)
    	at org.springframework.aop.aspectj.AspectJAfterAdvice.invoke(AspectJAfterAdvice.java:50)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.aop.aspectj.AspectJAfterThrowingAdvice.invoke(AspectJAfterThrowingAdvice.java:62)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85)
    	at com.student.aspectj.xml.MyAspect.myAround(MyAspect.java:24)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    	at java.lang.reflect.Method.invoke(Unknown Source)
    	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:629)
    	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:618)
    	at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.aop.framework.adapter.AfterReturningAdviceInterceptor.invoke(AfterReturningAdviceInterceptor.java:52)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:52)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
    	at com.sun.proxy.$Proxy2.addUser(Unknown Source)
    	at com.student.aspectj.xml.TestXmlAspectj.main(TestXmlAspectj.java:14)

AspectJ-----XML

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