Question

我正在构建一个客户端 - 服务器项目我需要的是客户端发送一个字符串，例如＆＃34; Pendu＆＃34;，服务器接收该字符串并发送一个名为＆＃34; Pendu＆＃34;的对象。回到客户端。

这是我的代码：

// server
ServerSocket serverSocket = new ServerSocket(6789);
System.out.println("accepting...");
Socket socket = serverSocket.accept();
BufferedReader inFromClient = new BufferedReader(new InputStreamReader(socket.getInputStream()));
ObjectOutputStream outToClient = new ObjectOutputStream(socket.getOutputStream());
String clientMsg = inFromClient.readLine();
System.out.println("Received from client: " + clientMsg);
Object obj;
System.out.println("building object...");
obj = Class.forName("Data." + clientMsg).newInstance();
System.out.println("object built");
if(obj instanceof Pendu)
{
    System.out.println("Send to client: " + obj);
    outToClient.writeObject(new Pendu());
}

//client
Socket socket = new Socket("localhost", 6789);
DataOutputStream outToServer = new DataOutputStream(socket.getOutputStream());
System.out.println("sending...");
outToServer.writeBytes("Pendu");
System.out.println("sent");
ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
System.out.println("receiving...");
Object obj = ois.readObject(); // it is blocked here and I don't know why
System.out.println("received");

课程Pendu在课程Data中定义：

package Data;

public class Pendu implements Serializable
{
    private static final long serialVersionUID = 1L;
    private static String[] words = new String[]{"bonjour", "bonsoir", "hier", "france", "ordinateur"};
    private static Random rand = new Random();
    private String but;

    public Pendu()
    {
        this.but = words[rand.nextInt(words.length)];
    }

    public int getLenth()
    {
        return this.but.length();
    }

    public String getBut()
    {
        return this.but;
    }

    @Override
    public String toString()
    {
        return "I'm a pendu object";
    }
}

我的问题是：
首先我执行服务器，我可以看到控制台中显示accepting... 然后我执行客户端，在控制台中我得到如下信息：

sending...
sent
receiving...

同时，服务器端没有显示任何新内容现在我停止客户端并显示服务器的所有其他消息：

Received from client: Pendu
building object...
object built

当然我也得到了错误：

java.net.SocketException：Broken pipe

这是合乎逻辑的，因为我杀死了没有完成接收的客户我不知道为什么客户无法按预期收到。

Answer 1

你正在读行而不是写行。您需要在"Pendu"消息中添加行终止符。

注意当您发送Pendu时，为什么要发送一个新的而不是刚创建的那个？

套接字readLine（）没有收到发送的行

1 个答案: