Spring实战06——AOP通知之xml配置

╰+哭是因爲堅強的太久メ 2021-09-28 09:40 340阅读 0赞

例子同上一文

1.接口

package com.qhf.aop.example03;
    
    public interface Performance {
        public void perform();
    }

2.表演实现类

package com.qhf.aop.example03;
    
    public class PerformanceImpl implements Performance {
    
        @Override
        public void perform() {
            //int a = 1/0;
            System.out.println("表演过程中...");
        }
    }

3.观众类

package com.qhf.aop.example03;
    
    import org.aspectj.lang.ProceedingJoinPoint;
    
    public class Audience {
    
        public void silencePhones(){
            System.out.println("关手机...");
        }
    
        public void takeSeats(){
            System.out.println("找座位...");
        }
    
        public void applause(){
            System.out.println("鼓掌...");
        }
    
        public void demandRefund(){
            System.out.println("要求重演...");
        }
    
        public void watchPerformance(ProceedingJoinPoint pj){
            try {
                silencePhones();
                takeSeats();
    
                pj.proceed();
    
                applause();
            } catch (Throwable t){
                demandRefund();
                t.printStackTrace();
            }
        }
    }

4.配置类

package com.qhf.aop.example03;
    
    import org.springframework.context.annotation.Configuration;
    import org.springframework.context.annotation.ImportResource;
    
    @Configuration //作为配置文件之一
    @ImportResource("classpath:aop/example03/aop.xml")
    public class AOPConfig {
    
    }

5.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: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">
    
        <aop:aspectj-autoproxy/>
    
        
            
                
                
                
                
                
                
                
    
            
        
        
        
        <aop:config>
            <aop:aspect ref="audience">
                
                <aop:pointcut id="performance" expression="execution(* com.qhf.aop.example03.Performance.perform(..))"/>
                
                <aop:around method="watchPerformance" pointcut-ref="performance"/>
                
            </aop:aspect>
        </aop:config>
    
        <bean id="performanceImpl" class="com.qhf.aop.example03.PerformanceImpl"/>
        <bean id="audience" class="com.qhf.aop.example03.Audience"/>
    </beans>

6.测试

ackage com.qhf.aop.example03;
    
    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(classes= AOPConfig.class)
    public class Test {
    
        @Autowired
        private Performance performance;//即便这里名字是performance，符合这个接口的实现类是PerformanceImpl，所以bean的id是performanceImpl
    
        @org.junit.Test
        public void test(){
            performance.perform();
        }
    }

7.结果

关手机...  
找座位...  
表演过程中...  
鼓掌...