SpringAOP的三种方式

布满荆棘的人生 2022-12-01 14:11 114阅读 0赞

1.作用对象

public class Person { 
        private Integer id;
        private String name;
    	// getter setter省略
        public void findPerson() { 
            Person person = new Person(1, "JDK");
            System.out.println("findperson 被执行");
        }
    }

2.方法一：Java API

public class MyAdvice implements MethodBeforeAdvice, AfterReturningAdvice { 
    
        @Override
        public void before(Method method, Object[] objects, Object o) throws Throwable { 
            System.out.println("准备执行方法： " + method.getName());
        }
    
        @Override
        public void afterReturning(Object o, Method method, Object[] objects, Object o1) throws Throwable { 
            System.out.println(method.getName() + " 方法执行结束");
        }
    }

<bean id="myAdvice" class="aop.MyAdvice"></bean>
    
    
    <bean class="org.springframework.aop.support.RegexpMethodPointcutAdvisor">
    	<property name="advice" ref="myAdvice"></property>
        <property name="pattern" value="beans.*.find.*"></property>
    </bean>
    
    
    <bean class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator"></bean>

3.方法二：AspectJ

@Aspect
    public class MyAspectJ { 
    
        // 配置拦截类 Person
        @Pointcut("execution(* beans.Person.*(..))")
        public void pointCut() { 
        }
    
        @Before("pointCut()")
        public void doBefore() { 
            System.out.println("执行doBefore方法");
        }
    
        @After("pointCut()")
        public void doAfter() { 
            System.out.println("执行doAfter方法");
        }
    }

<aop:aspectj-autoproxy/>
    
    <bean class="aop.MyAspectJ"></bean>

4.方法三：XML aop标签

public class MyPointcut { 
    
        public void doBefore() { 
            System.out.println("执行 doBefore方法");
        }
    
        public void doAfter() { 
            System.out.println("执行 doAfter 方法");
        }
    }

<bean id="myPointcut" class="aop.MyPointcut"></bean>
    <aop:config>
        
        <aop:pointcut id="pointcutConfig" expression="execution(* beans.Person.*(..))"></aop:pointcut>
        
        <aop:aspect ref="myPointcut">
            <aop:before method="doBefore" pointcut-ref="pointcutConfig"></aop:before>
            <aop:after method="doAfter" pointcut-ref="pointcutConfig"></aop:after>
        </aop:aspect>
    </aop:config>

5.测试

ApplicationContext context =
                   new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
    Person person = context.getBean("person", Person.class);
    person.findPerson();