spring 实现AOP

2021-04-13 21:27

阅读：547

标签：object proxy method work void odi 比较 execution stl

三种方式

第二个比较好

导入包


org.aspectj
    aspectjweaver
    1.9.5

使用API接口实现AOP

过程

1、接口类

2、继承接口类

3、添加日志

前

package com.wt.log;

import org.springframework.aop.MethodBeforeAdvice;

import java.lang.reflect.Method;

public class BeforeLog  implements MethodBeforeAdvice {

    public void before(Method method, Object[] args, Object target) throws Throwable {
        System.out.println(method.getName());
    }
}

后

package com.wt.log;

import org.springframework.aop.AfterReturningAdvice;

import java.lang.reflect.Method;

public class AfterLog implements AfterReturningAdvice {
    public void afterReturning(Object returnValue, Method method, Object[] args, Object object) throws Throwable {
        System.out.println(method.getName() + returnValue);
    }
}

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
        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="userService" class="com.wt.service.UserServiceImpl">bean>
    bean id="afterLog" class="com.wt.log.AfterLog">bean>
    bean id="beforeLog" class="com.wt.log.BeforeLog">bean>

    aop:config>

       aop:pointcut id="pointcut" expression="execution(* com.wt.service.UserServiceImpl.*(..))"/>

        aop:advisor advice-ref="beforeLog" pointcut-ref="pointcut"/>
        aop:advisor advice-ref="afterLog" pointcut-ref="pointcut"/>
    aop:config>
beans>

测试

import com.wt.service.UserService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MyTest {
    @Test
    public void userTest(){
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        UserService userService = context.getBean("userService", UserService.class);
        userService.add();
    }
}

自定义实现AOP

自定义一个类用于打印日志

package com.wt.diy;

public class UserLog {
    void before(){
        System.out.println("===========before===========");
    }

    void after(){
        System.out.println("===========after============");
    }
}

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="userService" class="com.wt.service.UserServiceImpl">bean>
    bean id="userLog" class="com.wt.diy.UserLog"/>

    aop:config>
        
        aop:aspect ref="userLog">
            
            
            aop:pointcut id="point" expression="execution(* com.wt.service.UserServiceImpl.*(..))"/>
            aop:before method="before" pointcut-ref="point"/>
            aop:after method="after" pointcut-ref="point"/>
        aop:aspect>
    aop:config>

beans>

使用注解实现AOP

package com.wt.diy;

import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;

// 切面
@Aspect
public class TestLog {
    
    @Before("execution(* com.wt.service.UserServiceImpl.*(..))")
    public void before(){
        System.out.println("=====方法执行前=====");
    }
    
    @After("execution(* com.wt.service.UserServiceImpl.*(..))")
    public void after(){
        System.out.println("=====方法执行后======");
    }
}

xml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
        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="userService" class="com.wt.service.UserServiceImpl"/>
    bean id="testLog" class="com.wt.diy.TestLog"/>

    aop:aspectj-autoproxy />

beans>

spring 实现AOP

标签：object proxy method work void odi 比较 execution stl

原文地址：https://www.cnblogs.com/wt7018/p/13339532.html

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spring 实现AOP

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