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");    }}