对象流问题
public class MyChatServer {

public MyChatServer (){
try{
//在6789监听
  ServerSocket ss=new ServerSocket(12345);
  //等待链接
  System.out.print("okoko");
  Socket s=ss.accept();
  //未成功
  ObjectInputStream ois=new ObjectInputStream(s.getInputStream());
  User u=(User)ois.readObject();


  Message ms = new Message();
  if(u.getUserPwd().equals("123456")){
  //返回登入成功
  ms.setMesType("1");
  }
  else ms.setMesType("2");
  ObjectOutputStream oos=new ObjectOutputStream(s.getOutputStream());
// oos.writeObject(ms);
  oos.writeUnshared(ms);oos.flush();
}catch(Exception e){
e.printStackTrace();
}
}
}


public class ChatClientConServer {
  //第一次链接
boolean b=false;
public boolean SendLoginMegToServer(User u){
try {
Socket s=new Socket("127.0.0.1",12345);
System.out.print("cli");

ObjectOutputStream oos=new ObjectOutputStream(s.getOutputStream());
// oos.writeObject(u);
oos.writeUnshared(u);
System.out.print(u.getUserId()+"\n"+u.getUserPwd());
ObjectInputStream ois=new ObjectInputStream(s.getInputStream());

Message ms=(Message)ois.readObject();System.out.print("client");
// Message ms=new Message();ms.setMesType("1");
if(ms.getMesType().equals("1")){
b=true;
}
} catch (Exception e) {
e.printStackTrace();
}
//finally{}
return b;
}
}

客户端发了一个对象后，服务器读取不到

------解决方案--------------------
//在6789监听
ServerSocket ss=new ServerSocket(12345);


到底在哪个端口？？？？