小鱼的空气

HelloReplacer.java

package javamxj . spring . basic . MethodReplacer ;

import java . lang . reflect . Method ;

import org . springframework . beans . factory . support . MethodReplacer ;

public class HelloReplacer implements MethodReplacer {
    publicObject reimplement(Object o, Method m, Object[] args) throwsThrowable {

        System.out.println("你好: " + args[0]);
        returnnull;
    }
}

beans.xml

<? xml version = " 1.0 " encoding = " GBK " ?>
<! DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd" >

< beans >
    <bean id="helloReplacer" class="javamxj.spring.basic.MethodReplacer.HelloReplacer"/>
   
    <bean id="helloA" class="javamxj.spring.basic.MethodReplacer.HelloImpl"/>
   
    <bean id="helloB" class="javamxj.spring.basic.MethodReplacer.HelloImpl">
        <replaced-method name="sayHello" replacer="helloReplacer"/>
    </bean>
   
</beans>

Main.java

package javamxj . spring . basic . MethodReplacer ;

import org . springframework . beans . factory . BeanFactory ;
import org . springframework . beans . factory . xml . XmlBeanFactory ;
import org . springframework . core . io . ClassPathResource ;
import org . springframework . core . io . Resource ;

public class Main {
    publicstaticvoid main(String[] args) {
        Resource res = new ClassPathResource(
                "javamxj/spring/basic/MethodReplacer/beans.xml");
        BeanFactory ft = new XmlBeanFactory(res);

        // 没有使用replaced-method
        Hello h = (Hello) ft.getBean("helloA");
        h.sayHello("分享Java快乐");
       
        // 使用replaced-method
        h=(Hello) ft.getBean("helloB");
        h.sayHello("分享Java快乐");

    }
}