Srping AOP基于注解和配置文件方式实现前通知，后通知，环绕通知，异常通知，最终通知-蒲公英云

Srping AOP基于注解和配置文件方式实现前通知，后通知，环绕通知，异常通知，最终通知

注解方式：

1、切面类

package cn.sz.aspect;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;
//这是一个横向抽取非主要业务方法的类
@Component
@Aspect
public class MyAspect {
    @Before(value = "execution(* cn.sz.dao.impl.*.*(..))")
    public void login(JoinPoint jp) {
        // 获取连接点的信息
        Object o = jp.getThis();
        System.out.println(o);
        // ((UserDao)o).delete();
        System.out.println("login.......");
    }
    @AfterReturning(value = "execution(* cn.sz.dao.impl.*.*(..))")
    public void log4j() {
        System.out.println("log4j......");
    }
    @Around(value = "execution(* cn.sz.dao.impl.*.*(..))")
    public void rou(ProceedingJoinPoint pjp) throws Throwable {
        System.out.println("round......1");
        pjp.proceed();
        System.out.println("round......2");
    }
    @AfterThrowing(value = "execution(* cn.sz.dao.impl.*.*(..))")
    public void exception() {
        System.out.println("exception......");
    }
    @After(value = "execution(* cn.sz.dao.impl.*.*(..))")
    public void finallyF() {
        System.out.println("finallyF......");
    }
}

2、主配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:user="http://www.springframework.org/schema/p"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    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
        ">
    <!-- 扫描:当前包中的类和子包中的类 -->
    <context:component-scan base-package="com.sz"></context:component-scan>
    <aop:aspectj-autoproxy/>
    <bean id="userDao" class="com.sz.dao.impl.UserDaoImpl"></bean>
</beans>

3、测试接口 UserDAO

package cn.sz.dao;
public interface UserDAO {
    public void save();
}

4.接口实现类

package cn.sz.dao.impl;
import cn.sz.dao.UserDAO;
//主要业务功能类
public class UserDAOImpl implements UserDAO {
    @Override
    public void save() {
        // 测试出异常
        // String a = null;
        // a.length();
        System.out.println("save...");
    }
}

5、测试类

package cn.sz.test;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import cn.sz.dao.UserDAO;
public class AopTest {
    @Test
    public void test1() {
        ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
        UserDAO userDAO = ac.getBean("userDao", UserDAO.class);
        userDAO.save();
    }
}

配置文件方式：

1、切面类

package cn.sz.aspect;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;
//这是一个横向抽取非主要业务方法的类
public class MyAspect {
    public void login(JoinPoint jp) {
        // 获取连接点的信息
        Object o = jp.getThis();
        System.out.println(o);
        // ((UserDao)o).delete();
        System.out.println("login.......");
    }
    public void log4j() {
        System.out.println("log4j......");
    }
    public void rou(ProceedingJoinPoint pjp) throws Throwable {
        System.out.println("round......1");
        pjp.proceed();
        System.out.println("round......2");
    }
    public void exception() {
        System.out.println("exception......");
    }
    public void finallyF() {
        System.out.println("finallyF......");
    }
}

2、主配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:user="http://www.springframework.org/schema/p"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    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
        ">
    <!-- 创建非主要业务方法类的对象：切面 -->    
    <bean id="myAspect" class="com.sz.aspect.MyAspect"></bean>
    <bean id="userDao" class="com.sz.dao.impl.UserDaoImpl"></bean>
    <!-- 实现将非主要业务方法切入到主要业务方法中去 -->
    <aop:config>
        <!-- 将切面对象引入 -->
        <aop:aspect ref="myAspect" id="my">
            <!-- 定义切入点：在哪些地方实现切入 -->
            <aop:pointcut expression="execution(* com.sz.dao.impl.UserDaoImpl.*(..))" id="p1"/>
            <!-- 配置前通知 -->
            <!-- method配置非主要业务方法/通知/关注点 -->
            <aop:before method="login" pointcut-ref="p1"/>
            <!-- 配置后通知 -->
            <aop:after-returning method="log4j" pointcut-ref="p1"/>
            <!-- 配置环绕通知 -->
            <aop:around method="rou" pointcut-ref="p1"/>
            <!-- 配置异常后通知 -->
            <aop:after-throwing method="exception" pointcut-ref="p1"/>
            <!-- 配置最终通知 -->
            <aop:after method="finallyF" pointcut-ref="p1"/>
        </aop:aspect>
    </aop:config>
</beans>

3、测试接口UserDAO

package cn.sz.dao;
public interface UserDAO {
    public void save();
}

4.接口实现类

package cn.sz.dao.impl;
import cn.sz.dao.UserDAO;
//主要业务功能类
public class UserDAOImpl implements UserDAO {
    @Override
    public void save() {
        // 测试出异常
        // String a = null;
        // a.length();
        System.out.println("save...");
    }
}

5、测试类

package cn.sz.test;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import cn.sz.dao.UserDAO;
public class AopTest {
    @Test
    public void test1() {
        ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
        UserDAO userDAO = ac.getBean("userDao", UserDAO.class);
        userDAO.save();
    }
}