Java 将客户端对象发送到服务器时出错

我无法通过客户端将对象发送到服务器，因为当我运行客户端时，服务器程序崩溃，导致出现“连接重置”错误

这是客户：

    public class Client {

    public static void main(String[] args) throws IOException, SQLException, ClassNotFoundException{
        Socket s = new Socket("192.168.1.3", 4444);
        ObjectOutputStream oos = new ObjectOutputStream(s.getOutputStream());

        Group g = new Group("EXAMPLE");
        String command = "ADD_GROUP";
        System.out.println("Sending: " + command);
        oos.writeUTF(command);
        oos.flush();
        oos.writeObject(g);
        oos.flush();
        s.close();
     }

}

这是服务器：

    public class Server{

    public static void main(String[] args) throws IOException, SQLException, ClassNotFoundException, ParseException
    {

       ServerSocket server = new ServerSocket(4444);

       System.out.println("Waiting for clients to connect...");

       SimpleDataSource.init("database.properties");
       Network net = new Network();

       while (true)
       {
          Socket s = server.accept();
          InetAddress clientAddress = s.getInetAddress();
          System.out.println("Incoming connection from: " + clientAddress.getHostName() + "[" + clientAddress.getHostAddress() + "]");

          ServiceClass service = new ServiceClass(s,net);
          service.doService();

       }
    }
}

这是ServiceClass：

    public class ServiceClass{

    private Socket s;
    private Network net;

    public ServiceClass(Socket s, Network net){
        this.s = s;
        this.net = net;
    }

    public void doService() throws IOException, SQLException, ClassNotFoundException, ParseException
    {
       ObjectInputStream ois = new ObjectInputStream(s.getInputStream());

       while(true){

            String line = (String) ois.readUTF();
            System.out.println("Received: " + line);

            if(line.equals("ADD_GROUP")){
                Group group = (Group) ois.readObject();
                net.addGroup(group);
            }
        }
    }
}

当我运行服务器时，它会等待客户端连接，当我运行客户端程序时，服务器崩溃会导致以下错误：

    Waiting for clients to connect...
Incoming connection from: UNKNOWN_DEVICE[192.168.1.3]
Received: ADD_GROUP
Error: Group already exists
Exception in thread "main" java.io.EOFException
    at java.io.DataInputStream.readUnsignedShort(DataInputStream.java:340)
    at java.io.ObjectInputStream$BlockDataInputStream.readUnsignedShort(ObjectInputStream.java:2808)
    at java.io.ObjectInputStream$BlockDataInputStream.readUTF(ObjectInputStream.java:2864)
    at java.io.ObjectInputStream.readUTF(ObjectInputStream.java:1072)
    at social_network.ServiceClass.doService(ServiceClass.java:35)
    at social_network.Server.main(Server.java:39)
Java Result: 1

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这有什么问题？

客户端没有关闭套接字，因此服务器可以在尝试读取不存在的第二个字符串时重置连接而不是EOFEException

---

当您修复该问题时，EOFEException意味着没有任何内容可供阅读。这不是问题。您只需抓住它，然后将其断开。

在删除

s.close（）后再试一次来自导致问题的服务器类。@Braj不，它不是导致错误的原因。读取时，服务器收到“连接重置”异常。它永远不会到达a.close（）行。我已经做到了，并且用新的错误编辑了我的代码log@Braj已经找到了。代码对我来说已经足够完整了。