Spring实现AOP的三种方式

超、凢脫俗 2022-10-21 03:42 169阅读 0赞

# 一、项目公共代码 #

**UserService.java**

package com.zhang.service;
    
    public interface UserService { 
        public void add();
        public void delete();
        public void update();
        public void select();
    }

**UserServiceImpl.java**

package com.zhang.service;
    
    public class UserServiceImpl implements UserService{ 
    
        public void add() { 
            System.out.println("这是一个add方法！");
        }
    
        public void delete() { 
            System.out.println("这是一个delete方法！");
        }
    
        public void update() { 
            System.out.println("这是一个update方法！");
        }
    
        public void select() { 
            System.out.println("这是一个select方法！");
        }
    }

# 二、实现AOP方式1：注解方式 #

**annotionPointCut.java**

package com.zhang.diy;
    
    import org.aspectj.lang.annotation.After;
    import org.aspectj.lang.annotation.Aspect;
    import org.aspectj.lang.annotation.Before;
    
    @Aspect  //表明该类是一个切面
    public class annotionPointCut { 
    
        @Before("execution(* com.zhang.service.UserServiceImpl.*(..))")
        public void before(){ 
            System.out.println("before,方法执行前，注解方式实现aop----");
        }
    
        @After("execution(* com.zhang.service.UserServiceImpl.*(..))")
        public void after(){ 
            System.out.println("after,方法执行后，注解方式实现aop----");
        }
    }

**applicationContext.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:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
            
        
        <bean id="annotionPointCut" class="com.zhang.diy.annotionPointCut"></bean>
        <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
    </beans>

**MyTest.java**

import com.zhang.service.UserService;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class MyTest { 
        public static void main(String[] args) { 
            ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
            UserService service = (UserService) context.getBean("UserService");
            service.add();
        }
    }

**执行结果**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ppa2UxMTIzMQ_size_16_color_FFFFFF_t_70]

# 三、实现AOP方式2：使用自定义方式 #

**diyPointCut.java**

package com.zhang.diy;
    
    public class diyPointCut { 
    
        public void before(){ 
            System.out.println("方法执行前-------------");
        }
    
        public void after(){ 
            System.out.println("方法执行后-------------");
        }
    }

**applicationContext.xml**

<bean id="diy" class="com.zhang.diy.diyPointCut"></bean>
        <aop:config>
            <aop:aspect ref="diy">
                 
                 <aop:pointcut id="pointcut" expression="execution (* com.zhang.service.UserServiceImpl.*(..))"/>
                 
                  <aop:before method="before" pointcut-ref="pointcut"></aop:before>
                  <aop:after method="after" pointcut-ref="pointcut"></aop:after>
            </aop:aspect>
        </aop:config>

**执行结果**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ppa2UxMTIzMQ_size_16_color_FFFFFF_t_70 1]

# 四、实现AOP方式3：使用原生Spring API接口 #

**afterLog实现AfterReturningAdvice接口**

package com.zhang.log;
    
    import org.springframework.aop.AfterReturningAdvice;
    import java.lang.reflect.Method;
    
    public class afterLog implements AfterReturningAdvice { 
        public void afterReturning(Object returnVale, Method method, Object[] objects, Object o1) throws Throwable { 
            System.out.println("执行了"+method.getName()+"方法，返回结果"+returnVale);
        }
    }

**log实现MethodBeforeAdvice接口**

package com.zhang.log;
    
    import org.springframework.aop.MethodBeforeAdvice;
    import java.lang.reflect.Method;
    
    public class log implements MethodBeforeAdvice { 
        //method要执行的目标对象方法
        //args参数
        //target目标对象
        public void before(Method method, Object[] args, Object target) throws Throwable { 
            System.out.println(target.getClass().getName()+"的"+method.getName()+"方法被执行了--------");
        }
    }

**applicationContext.xml**

<bean id="UserService" class="com.zhang.service.UserServiceImpl"></bean>
        <bean id="log" class="com.zhang.log.log"></bean>
        <bean id="afterLog" class="com.zhang.log.afterLog"></bean>
        
    
        <aop:config>
            <aop:pointcut id="poincut" expression="execution(* com.zhang.service.UserServiceImpl.*(..))"></aop:pointcut>
            <aop:advisor advice-ref="log" pointcut-ref="poincut"></aop:advisor>
            <aop:advisor advice-ref="afterLog" pointcut-ref="poincut"></aop:advisor>
        </aop:config>

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ppa2UxMTIzMQ_size_16_color_FFFFFF_t_70 2]

# 五、项目整体结构 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ppa2UxMTIzMQ_size_16_color_FFFFFF_t_70 3]

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