spring aop实例

迷南。 2021-11-02 10:31 254阅读 0赞

1，前置通知；

2，后置通知；

3，环绕通知；

4，返回通知；

5，异常通知；

1.1定义一个接口

package com.java.test6;
    
    /**
     * @author nidegui
     * @create 2019-06-23 9:40
     */
    public interface Student {
        public void addStudent(String name);
    }

实现

package com.java.test6;
    
    /**
     * @author nidegui
     * @create 2019-06-23 9:41
     */
    public class StudentImpl implements  Student {
        @Override
        public void addStudent(String name) {
            System.out.println("添加学生"+name);
        }
    }

在添加学生之前添加一个切点

package com.java.test6;
    
    import org.aspectj.lang.JoinPoint;
    import org.aspectj.lang.ProceedingJoinPoint;
    
    /**
     * @author nidegui
     * @create 2019-06-23 9:45
     */
    public class StudentServiceAspect {
        
        //前置通知，在方法之前通知
        public void before(JoinPoint jp){
        
            System.out.println("类名:"+jp.getTarget().getClass().getName());
            System.out.println("方法名："+jp.getSignature().getName());
            System.out.println("开始添加学生："+jp.getArgs()[0]);
    
            System.out.println("开始添加学生");
        }
    　　//后置通知
        public void doAfter(JoinPoint jp){
        
            System.out.println("类名:"+jp.getTarget().getClass().getName());
            System.out.println("方法名："+jp.getSignature().getName());
            System.out.println("学生添加完成："+jp.getArgs()[0]);
        }
       //环绕通知
        public Object doAround(ProceedingJoinPoint pjp) throws Throwable{
        
            System.out.println("添加学生前");
            Object retVal=pjp.proceed();
            System.out.println(retVal);
            System.out.println("添加学生后");
            return retVal;
        }
    　　//返回通知
        public void doAfterReturning(JoinPoint jp){
        
            System.out.println("返回通知");
        }
    　　//异常通知
        public void doAfterThrowing(JoinPoint jp,Throwable ex){
        
            System.out.println("异常通知");
            System.out.println("异常信息："+ex.getMessage());
        }
    
    
    }

在配置文件中配置

<?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
            http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/aop
            http://www.springframework.org/schema/aop/spring-aop.xsd">
    
    
        <bean id="studentImpl" class="com.java.test6.StudentImpl"></bean>
        <bean id="studentAcpect" class="com.java.test6.StudentServiceAspect"></bean>
    
        <aop:config>
            <aop:aspect id="studentAcpect" ref="studentAcpect">
                
                <aop:pointcut id="b" expression="execution(* com.java.test6.*.*(..))"></aop:pointcut>
                
                <aop:before method="before" pointcut-ref="b"></aop:before>
                
                <aop:after method="doAfter" pointcut-ref="b"></aop:after>
                
                <aop:around method="doAround" pointcut-ref="b"/>
                
                <aop:after-returning method="doAfterReturning" pointcut-ref="b"/>
                
                <aop:after-throwing method="doAfterThrowing" pointcut-ref="b" throwing="ex"/>
    
            </aop:aspect>
        </aop:config>
    </beans>

测试：

package com.java.test6;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    /**
     * @author nidegui
     * @create 2019-06-22 14:47
     */
    public class Test {
        public static void main(String[] args) {
           ApplicationContext ac = new ClassPathXmlApplicationContext("beanss.xml");
    
            Student people =(Student) ac.getBean("studentImpl");
            people.addStudent("zhangsna");
    
        }
    }

![1691985-20190623103906233-1428125154.png][]

转载于:https://www.cnblogs.com/nidegui/p/11072014.html

[1691985-20190623103906233-1428125154.png]: /images/20211101/13ac791fc43a40e3a231cf29a31c6275.png