作者：因情语写

链接：https://www.proprogrammar.com/article/443

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　　有两种适配器模式：类的适配器和对象的适配器

　　类的适配器是继承要适配的类，对象的适配器是关联要适配的类的对象，类的适配器继承了要适配的类，就不能继承其它类了，而对象的适配器不但能继承其它类，还能适配其子类，所以觉得对象的适配器适用范围要大一些，下面就说说对象的适配器模式

　　一个人到德国旅行，带了个国标的充电器，但德国要用德标的充电器，所以他又带了一个适配器

package constructional.pattern.adapter;

public interface DBSocketInterface {
    void output();
}

package constructional.pattern.adapter;

public class DBSocket implements DBSocketInterface {

    @Override
    public void output() {
        System.out.println("two round Angle output current, charge German equipment.");
    }

}

package constructional.pattern.adapter;

public interface GBSocketInterface {
    void output();
}

package constructional.pattern.adapter;

public class GBSocket implements GBSocketInterface {

    @Override
    public void output() {
        System.out.println("three plat angle output current. charge China equipment.");
    }

}

package constructional.pattern.adapter;

public class SocketAdapter implements DBSocketInterface {
    private GBSocketInterface gBSocketInterface;
    
    public SocketAdapter(GBSocketInterface gBSocketInterface) {
        this.gBSocketInterface = gBSocketInterface;
    }
    
    @Override
    public void output() {
        System.out.println("insert into two round hole and three plat"
                + " angle can be inserted to output current.");
        gBSocketInterface.output();
    }

}

package constructional.pattern.adapter;

public class Hotel {
    private DBSocketInterface dbSocketInterface;
    
    public Hotel(DBSocketInterface dbSocketInterface) {
        super();
        this.dbSocketInterface = dbSocketInterface;
    }

    public void charge()
    {
        dbSocketInterface.output();
    }
}

　　适配器继承了德标的接口，但用来适配国标的充电器，即把国标的充电器和德标的标准结合起来

　　下面看一下测试代码

package constructional.pattern.adapter;

public class TestSocketClass {
    public static void main(String[] args) {
        // 1.德国电器
        DBSocketInterface dbSocket = new DBSocket();
        Hotel hotel = new Hotel(dbSocket);
        hotel.charge();
        
        System.out.println("----------------------------------------------------------------");
        
        // 2.中国电器
        GBSocketInterface gBSocket = new GBSocket();
        SocketAdapter socketAdapter = new SocketAdapter(gBSocket);
        Hotel hotel2 = new Hotel(socketAdapter);
        hotel2.charge();
    }
}

　　运行结果如下

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