SpringAOP的XML版

待我称王封你为后i 2022-12-13 15:26 188阅读 0赞

## IWorkDao ##

package com.lbl.dao;
    
    public interface IWorkDao {
         void work();
    }

## WorkDaoImpl ##

/** * Created by 李柏霖 * 2020/10/12 10:30 */
    
    package com.lbl.dao.Impl;
    
    import com.lbl.dao.IWorkDao;
    
    public class WorkDaoImpl implements IWorkDao { 
    
        @Override
        public void work() { 
            System.out.println("我爱加班");
        }
    
    }

## Advice ##

/** * Created by 李柏霖 * 2020/10/12 10:32 */
    
    package com.lbl.aspect;
    
    
    public class Advice { 
    
        public void writeLog(){ 
            System.out.println("写入日志");
        }
    }

## 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: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-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
    
    <bean id="workDaoImpl" class="com.lbl.dao.Impl.WorkDaoImpl"></bean>
    <bean id="advice" class="com.lbl.aspect.Advice"></bean>
        <aop:config>
            <aop:pointcut id="work" expression="execution(public void com.lbl.dao.Impl.WorkDaoImpl.work())"/>
            <aop:aspect ref="advice">
                <aop:after method="writeLog" pointcut-ref="work"></aop:after>
            </aop:aspect>
        </aop:config>
    </beans>

## DaoTest ##

/** * Created by 李柏霖 * 2020/10/12 10:37 */
    
    package com.lbl.dao;
    
    import org.junit.Test;
    import org.junit.runner.RunWith;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.test.context.ContextConfiguration;
    import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
    
    @RunWith(SpringJUnit4ClassRunner.class)
    @ContextConfiguration("classpath:applicationContext.xml")
    public class DaoTest { 
    
        @Autowired
        IWorkDao iworkDao;
    
        @Test
        public void work(){ 
            System.out.println(iworkDao);
            iworkDao.work();
        }
    }

## 测试运行结果： ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3OTI0OTA1_size_16_color_FFFFFF_t_70_pic_center]

## AOP切面编程-切面表达式 ##

*  （1）什么是切面表达式  
    `execution([修饰符] 返回值类型 包.类.方法(参数列表) );`
 *  （2）切面表达式有什么用？  
    符合表达式的方法，会被增强  
    使用\* 表过任意的内容  
    使用… 可以表示包与子包下面的类  
    使用…可以写在方法(…)表示任意参数

我这边在上面代码的基础上再加一个eat（）方法，然后用通配符的方法，同时配置这两个方法。

## IWorkDao ##

package com.lbl.dao;
    
    public interface IWorkDao { 
         void work();
         void eat();
    }

## WorkDaoImpl ##

Advice方法同上不变。

## applicationContext.xml ##

这里面用了通配符的方法，将任意返回值的，在com.lbl.dao包以及其子包下的所有方法，参数任意。都织入writeLog这个方法。

<?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-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
    
    <bean id="workDaoImpl" class="com.lbl.dao.Impl.WorkDaoImpl"></bean>
    <bean id="advice" class="com.lbl.aspect.Advice"></bean>
        <aop:config>
            <aop:pointcut id="work" expression="execution( * com.lbl.dao..*(..))"/>
            <aop:aspect ref="advice">
                <aop:after method="writeLog" pointcut-ref="work"></aop:after>
            </aop:aspect>
        </aop:config>
    </beans>

## 运行结果： ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3OTI0OTA1_size_16_color_FFFFFF_t_70_pic_center 1]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3OTI0OTA1_size_16_color_FFFFFF_t_70_pic_center]: /images/20221123/8a5449069adf479c8888c1e65c5abf8a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3OTI0OTA1_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221123/898a023304154e1290127dbf748892c1.png