java设计模式---桥接模式

桥接模式的目的是把抽象和具体实现分离，其uml类图如下所示：

public interface SendMessage {
    abstract void send(String message,String name);
}

public class EmailSend implements SendMessage{
    public void send(String message,String name){
        System.out.println(message+" through email send to"+ name);
    }
}

public class SystemSend implements SendMessage{
    public void send(String message,String name){
        System.out.println(message+" through send to "+name);
    }
}

public abstract class Message{
    public SendMessage sendMethd ;
    public Message(SendMessage s){
        this.sendMethd = s;
    }
    public abstract void send(String message,String name);
}

public class CommandMessage extends Message{
    public CommandMessage(SendMessage s){
        super(s);
    }
    public void send(String message,String name){
        this.sendMethd.send(message, name);
    }
}

public class ErgentMessage extends Message{
    public ErgentMessage(SendMessage s){
        super(s);
    }
    public void send(String m,String n){
        m+="加急";
        this.sendMethd.send(m,n);
    }
}

public class TestBridge{
    public static void main(String args[]){
        SendMessage s1 = new EmailSend();
        Message m1 = new CommandMessage(s1);
        m1.send("utstarcom","china");
        
        Message m2 = new ErgentMessage(s1);
        m2.send("utstarcom","china");
    }
}