代理(Proxy)模式

public interface Marry {
    public void marry();
}

class WeddingCompany implements Marry{
    public WeddingCompany(Walidake walidake) {
        this.walidake = walidake;
    }

    @Override
    public void marry() {
        System.out.println("婚礼筹备");

        walidake.marry();

        System.out.println("婚礼结束");

    }
}

public class WeddingCompany implements InvocationHandler{

    private Object object;

    public WeddingCompany(Object object) {
        this.object = object;
    }

    @SuppressWarnings("unchecked")
    public <T> T getProxy(){
        return (T)Proxy.newProxyInstance(
                Thread.currentThread().getContextClassLoader(), 
                object.getClass().getInterfaces(), 
                this);
    }


    @Override
    public Object invoke(Object proxy, Method method, Object[] args)
            throws Throwable {
        if ("marry".equals(method.getName())) {
            System.out.println("婚礼筹备");

            method.invoke(object, args);

            System.out.println("婚礼结束");
        }
        return null;
    }

}