Spring @Aspect切面参数传递:
Xml:
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p" xmlns:util="http://www.springframework.org/schema/util" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd"> <!-- 这个声明会创建AnnotationAwareAspectJAutoProxyCreator,进行切面Bean的代理 --> <aop:aspectj-autoproxy /> <!-- 必须将切面类声明为一个Bean --> <bean id="magician" class="com.stono.sprtest3.Magician"></bean> <bean id="volunteer" class="com.stono.sprtest3.Volunteer"></bean> </beans>
AppBean:
package com.stono.sprtest3; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class AppBeans12 { public static void main(String[] args) { @SuppressWarnings("resource") ApplicationContext context = new ClassPathXmlApplicationContext("appbeans12.xml"); // 在AOP情况下,如果有接口就必须用接口来接,否则会报ClassCastException; Thinker bean = (Thinker) context.getBean("volunteer"); bean.thinkOfSomething("volunteer think of something"); MindReader bean2 = (MindReader) context.getBean("magician"); String thoughts = bean2.getThoughts(); System.out.println(thoughts); } }
切面:
package com.stono.sprtest3; public interface MindReader { void interceptThoughts(String thoughts); String getThoughts(); } package com.stono.sprtest3; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before; import org.aspectj.lang.annotation.Pointcut; @Aspect public class Magician implements MindReader { @Pointcut("execution(* com.stono.sprtest3.Thinker.thinkOfSomething(String)) && args(thoughts)") public void thinking(String thoughts) { } private String thoughts; @Override @Before("thinking(thoughts)") public void interceptThoughts(String thoughts) { System.out.println("Intercepting volunteer's thoughts"); this.thoughts = thoughts; } @Override public String getThoughts() { return thoughts; } }
POJO:
package com.stono.sprtest3; public interface Thinker { void thinkOfSomething(String thoughts); } package com.stono.sprtest3; public class Volunteer implements Thinker { private String thoughts; @Override public void thinkOfSomething(String thoughts) { this.thoughts = thoughts; } public String getThoughts() { return thoughts; } }