Java学习路线-57：静态代理和动态代理

AbstractObject
    - RealObject
    - Proxy

Client

package com.pengshiyu.proxy;

public class Host implements IRent{
    @Override
    public void rent() {
        System.out.println("房东租房");
    }
}

package com.pengshiyu.proxy;

// 中介
public class Proxy implements IRent{
    private Host host;

    public Proxy(Host host){
        this.host = host;
    }

    @Override
    public void rent() {
        this.beforeRent();
        this.host.rent();
        this.afterRent();
    }

    private void beforeRent(){
        System.out.println("中介带看房");
    }

    private void afterRent(){
        System.out.println("签订合同");
    }
}

package com.pengshiyu.proxy;

// 客户
public class Client {
    public static void main(String[] args) {
        Host host = new Host();
        Proxy proxy = new Proxy(host);
        proxy.rent();
    }
}

package com.pengshiyu.proxy;

public interface IVehicle {
    void run();
}

package com.pengshiyu.proxy;


public class Car implements IVehicle {
    public void run() {
        System.out.println("Car会跑");
    }
}

package com.pengshiyu.proxy;

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

public class VehicleInvocationHandler implements InvocationHandler {

    private Object target;

    public VehicleInvocationHandler(Object target){
        this.target = target;
    }

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        System.out.println("---------before-------");
        Object result = method.invoke(target, args);
        System.out.println("---------after-------");
        return result;
    }

}

package com.pengshiyu.proxy;

import java.lang.reflect.Proxy;

// 客户
public class Client {
    public static void main(String[] args) {
        IVehicle car = new Car();

        IVehicle carProxy = (IVehicle)Proxy.newProxyInstance(
                car.getClass().getClassLoader(),
                car.getClass().getInterfaces(),
                new VehicleInvocationHandler(car)
        );

        carProxy.run();

    }
}