Spring AOP切面的時候參數的傳遞

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.xsdhttp://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsdhttp://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd"><bean id="volunteer" class="com.stono.sprtest2.Volunteer"></bean><bean id="magician" class="com.stono.sprtest2.Magician"></bean><bean id="singer" class="com.stono.sprtest2.Singer"></bean><aop:config><aop:aspect ref="magician"><aop:pointcut expression="execution(* com.stono.sprtest2.Thinker.thinkOfSomething(String)) and args(thoughts)" id="thinking" /><aop:before method="interceptThoughts" pointcut-ref="thinking" arg-names="thoughts" /></aop:aspect></aop:config> </beans>

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AppBean：

package com.stono.sprtest2;import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext;public class AppBeans10 {@SuppressWarnings("resource")public static void main(String[] args) {ApplicationContext context = new ClassPathXmlApplicationContext("appbeans10.xml");// 在AOP情況下，如果有接口就必須用接口來接，否則會報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);// 沒有接口的Bean還是可以用類的；Singer bean3 = (Singer) context.getBean("singer");bean3.perform();} }

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POJO：

package com.stono.sprtest2;public interface Thinker {void thinkOfSomething(String thoughts); } package com.stono.sprtest2;public class Volunteer implements Thinker {private String thoughts;@Overridepublic void thinkOfSomething(String thoughts) {this.thoughts = thoughts;}public String getThoughts() {return thoughts;} }

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AOP：

package com.stono.sprtest2;public interface MindReader {void interceptThoughts(String thoughts);String getThoughts(); } package com.stono.sprtest2;public class Magician implements MindReader {private String thoughts;@Overridepublic void interceptThoughts(String thoughts) {System.out.println("Intercepting volunteer's thoughts");this.thoughts = thoughts;}@Overridepublic String getThoughts() {return thoughts;} }

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總結

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