JDK 动态代理讨债实例

2018-06-18 00:48:01来源：未知阅读 ()

现弄一个讨债接口

package cn.itcast.g_dongtaidaili;

public interface Taozhai {

    void taozhai();
}

再弄一个讨债实现类

package cn.itcast.g_dongtaidaili;

public class Taozhai_Impl implements Taozhai{

    @Override
    public void taozhai() {

        System.out.println("把钱还给我~~~");
    }

}

讨债力度太弱,根本讨不回

所以请讨债公司代理讨债

package cn.itcast.g_dongtaidaili;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

import org.junit.Test;

public class CompanyProxyTaozhai implements Taozhai {

    Taozhai_Impl taozhai=new Taozhai_Impl();
    
    @Override
    public void taozhai() {

        Taozhai strong_taozhai = (Taozhai) Proxy.newProxyInstance(cn.itcast.g_dongtaidaili.Taozhai_Impl.class.getClassLoader(),
                new Class[]{cn.itcast.g_dongtaidaili.Taozhai.class}, new InvocationHandler() {
                    
                    @Override
                    public Object invoke(Object obj, Method method, Object[] param) throws Throwable {
                        
                        System.out.println("讨债公司利用恐吓 威胁 暴力殴打 打砸等方式逼债");
                        method.invoke(taozhai, param);
                        System.out.println("讨债成功,讨债公司分取利益");
                        return null;
                    }
                });
        
        strong_taozhai.taozhai();
    }

}

与装饰者设计模式相同,代理讨债也实现了讨债接口,植入原始讨债对象反射出原始讨债方法并进行增强,返回增强的讨债对象.

实现类

package cn.itcast.g_dongtaidaili;

public class DemoTaozhai {

    public static void main(String[] args) {

        CompanyProxyTaozhai taozhai=new CompanyProxyTaozhai();
        taozhai.taozhai();
    }

}

结果演示