java - 可序列化的 ObjectOutputStream 对象

Question

我想制作服务器客户端应用程序并使用 ObjecOutputStream 将对象发送到客户端，但我想发送的对象是 ObjectOutputStream 对象，我需要以某种方式对其进行序列化，但我不知道如何......有什么建议吗？

我需要发送对象播放器:

public class Player implements Serializable{
    ObjectOutputStream out;
    public Player(ObjectOutputStream out){
        this.out = out;
    }
    public send(){
        this.out.writeObject(this);
    }
}

在启动类似的代码之后，一个异常显示如下:
java.io.NotSerializableException:java.io.ObjectOutputStream

Answer 1

因为 ObjectOutputStream 没有实现 Serializable，所以你的 Player 类不能被序列化。要修复它:

class Player implements Serializable {
    private transient ObjectOutputStream out;

    // the rest
}

在我看来，Player 不应该知道如何发送自己。您可以引入一个新类 PlayerSender:

class PlayerSender {

    private ObjectOutputStream outputStream;

    public PlayerSender(OutputStream out) {
        this.outputStream = new ObjectOutputStream(out);
    }

    public void send(Player player) {
        this.outputStream.writeObject(player);
    }

}

//---- Usage ----

List<Player> players = // make a bunch of players;

PlayerSender playerSender = new PlayerSender(getNetworkStream());
//PlayerSender playerSender = new PlayerSender(new FileOutputStream("/players/list.txt");
//PlayerSender playerSender = new PlayerSender(socketConnection.getOutputStream());
for (Player player : players) {
    playerSender.send(player);
}