SpringAop实现接口版

叁歲伎倆 2023-07-03 04:56 40阅读 0赞

前面记录了基于注解的aop [注解aop链接地址][aop]  
基于xml配置的aop [配置aop链接地址][aop 1]

记录一下基于实现接口方式的aop

1.  前置通知实现：MethodBeforeAdvice
2.  后置通知实现：AfterReturningAdvice
3.  异常通知实现：ThrowsAdvice
4.  环绕通知实现：MethodInterceptor

前面三者都是来自org.springframework.aop.包下的  
环绕通知不一样来自 org.aopalliance.intercept.包下本质就是用拦截器来实现 ，导包的时候注意不要导错

实现接口的方式实现aop步骤

1.  导包 或者 maven 依赖
2.  实现对应的通知类
3.  将通知类和目标方法加入到ioc容器当中
4.  通过配置将通知类和目标方法关联起来

项目架构  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx_size_16_color_FFFFFF_t_70]  
Operation 类 （业务类接口）

public interface Operation
    {
        //  加法
         double add(double i, double j);
        //  减法
         double subtract(double i, double j);
        //  乘法
         double mul(double i, double j);
        //  除法
          double div(double i, double j);
    }

OperationImpl 类 （业务实现类）

public class OperationImpl implements Operation
    {
        @Override
        public double add(double i, double j)
        {
            return i+j;
        }
    
        @Override
        public double subtract(double i, double j)
        {
            return i-j;
        }
    
        @Override
        public double mul(double i, double j)
        {
            return i*j;
        }
    
        @Override
        public double div(double i, double j)
        {
            return i/j;
        }
    }

LogBefore 类 （前置通知类）

/*
     implements MethodBeforeAdvice 实现该类
     重写  before 方法 实现前置通知
    * */
    public class LogBefore implements MethodBeforeAdvice
    {
        @Override
        public void before(Method method, Object[] objects, Object o) throws Throwable
        {
            System.out.println("我是前置通知,目标方法的方法名 "+ method.getName()+"\t目标对象" +o+"\t参数列表"+ Arrays.asList(objects));
        }
    }

LogAfterReturning 类 （后置通知类）

public class LogAfterReturning implements AfterReturningAdvice
    {
    
        @Override
        public void afterReturning(Object o, Method method, Object[] objects, Object o1) throws Throwable
        {
            System.out.println("我是后置通知,目标方法的方法名 "+ method.getName()+"\t目标对象" +o1+"\t参数列表"+ Arrays.asList(objects));
        }
    }

LogThrowing 类 （异常类）

public class LogThrowing implements ThrowsAdvice
    {
        //  异常类方法
        public void afterThrowing(Method method, Object[] args, Object target, Throwable throwable){
            System.out.println("我是异常通知,目标方法的方法名 "+ method.getName()+"\t目标对象" +target+"\t异常信息"+throwable);
        }
    }

LogAround 类（环绕通知类）

public class LogAround implements MethodInterceptor
    {
        @Override
        public Object invoke(MethodInvocation invocation) throws Throwable
        {
            Object result = null;
            try
            {
                System.out.println("我是 [环绕通知]的 前置通知");
    
                result= invocation.proceed(); // 控制着目标方法是否执行
                System.out.println("我是 [环绕通知]的 后置通知");
                System.out.println("目标方法的返回值 "+result+"\t 目标对象 " +invocation.getThis()+"\t 调用方法的方法名" + invocation.getMethod().getName());
    
    
            }
            catch (Exception e)
            {
                System.out.println("我是 [环绕通知]的 异常通知");
            }
            finally
            {
                System.out.println("我是 [环绕通知]的 最终通知");
            }
    
            return  result;
        }
    }

xml

<?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:context="http://www.springframework.org/schema/context"
           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/context
           http://www.springframework.org/schema/context/spring-context.xsd
            http://www.springframework.org/schema/aop
            http://www.springframework.org/schema/aop/spring-aop.xsd">
    
    
        
        <bean id="operation" class="com.stone.aopdome.operation.impl.OperationImpl"></bean>
    
        
        <bean id="before" class="com.stone.aopdome.proxy.LogBefore"></bean>
    
        
        <bean id="after" class="com.stone.aopdome.proxy.LogAfterReturning"></bean>
    
        
        <bean id="throwing" class="com.stone.aopdome.proxy.LogThrowing"></bean>
    
        
        <bean id="around" class="com.stone.aopdome.proxy.LogAround"></bean>
    
        
        <aop:config>
            
            <aop:pointcut id="myPointcut" expression="execution(* com.stone.aopdome.operation.impl.OperationImpl.*(..))"/>
    
            
            <aop:advisor advice-ref="before" pointcut-ref="myPointcut"/>
    
            <aop:advisor advice-ref="after" pointcut-ref="myPointcut"/>
    
            <aop:advisor advice-ref="throwing" pointcut-ref="myPointcut"/>
    
            <aop:advisor advice-ref="around" pointcut-ref="myPointcut"/>
    
        </aop:config>
    
    
    
    
    </beans>

测试类

public class SpringAopInterfaceTest
    {
        ApplicationContext ioc = new ClassPathXmlApplicationContext("applicationContext.xml");
    
        @Test
        public void testAopInterface1(){
            Operation bean = ioc.getBean(Operation.class);
            double add = bean.add(1, 3);
            System.out.println(add);
        }
    }

执行结果  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx_size_16_color_FFFFFF_t_70 1]

[aop]: https://blog.csdn.net/qq_44892091/article/details/104129244
[aop 1]: https://blog.csdn.net/qq_44892091/article/details/104143949
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200202173231465.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/2020020217394731.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODkyMDkx,size_16,color_FFFFFF,t_70