Java设计模式之适配器模式

下面通过一个PS2PORT端口转USBPORT端口的转换线说明：

package com.zzy.adapter;

/**
 * PS2接口，圆口
 * @author eason
 *
 */
public interface PS2Port {
    public void workWithPS2();
}

package com.zzy.adapter;

/**
 * USB接口，U口
 * @author eason
 *
 */
public interface USBPort {
    public void workWithUSB();
}

package com.zzy.adapter;

/**
 * 对象适配器
 * 将PS2接口装换成USB接口
 * 所以此类类型是USB接口(implements USBPort) + 成员变量ps2Port
 * @author eason
 *
 */
public class PS2ToUSB implements USBPort{

    private PS2Port ps2Port;

    public PS2ToUSB(PS2Port ps2Port) {
        this.ps2Port = ps2Port;
    }

    @Override
    public void workWithUSB() {
        System.out.println("转换的关键在这里,本来是");
        ps2Port.workWithPS2();
        System.out.println("经过你的转换，现在是USB工作中");
    }

}

package com.zzy.adapter;

/**
 * 测试类
 * client
 * @author eason
 *
 */
public class TestAdapter {

    public static void main(String[] args) {
        //1.我现在有一个PS2接口
        PS2Port ps2Port = new PS2Port() {
            @Override
            public void workWithPS2() {
                System.out.println("PS2工作中");
            }
        };

        //2.但是我需要的是一个USB接口啊,对我(client)来说，我只认识USB接口
        //3.经过PS2ToUSB的转换，PS2接口变成了USB接口
        USBPort ps2ToUsbPort = new PS2ToUSB(ps2Port);

        ps2ToUsbPort.workWithUSB();

    }

}