java - 如何在java中通过TCP发送对象?

I'm writing a program to send an object from one class to another class. Here is a short sample example of my program to represent the problem. As you can see the object to send from server to client is Student class which has been defined separately in each class(Server/Client). I have examined this code by sending an ArrayList which works fine but when it comes to a class type which defined by myself i'm receiving this error:

Exception in thread "main" java.lang.ClassCastException: ServerSide$1Student cannot be cast to ClientSide$1Student
    at ClientSide.main(ClientSide.java:29)

这是服务器端的代码:

import java.io.*;
import java.net.*;

public class ServerSide {

    public static void main(String[] args) {
        class Student implements Serializable
        {
            int id;
            public Student(int num){id=num;}
            public void setID(int num){id=num;}
            public void Print(){System.out.println("id = " + id);}
        }
        try
        {
            Student a = new Student(3);
            ServerSocket myServerSocket = new ServerSocket(9999);
            Socket skt = myServerSocket.accept();   
            try 
            {
                ObjectOutputStream objectOutput = new ObjectOutputStream(skt.getOutputStream());
                objectOutput.writeObject(a);                
            } 
            catch (IOException e) 
            {
                e.printStackTrace();
            } 
        }
        catch (IOException e) 
        {
            e.printStackTrace();
        }
    }
}

而对于客户端是:

import java.io.*;
import java.net.Socket;
import java.net.UnknownHostException;

public class ClientSide {

    public static void main(String[] args)
    {
        class Student implements Serializable
        {
            int id;
            public Student(int num){id=num;}        
            public void setID(int num){id=num;}
            public void Print(){System.out.println("id = " + id);}
        }
        try {       
            Socket socket = new Socket("10.1.1.2",9999);
            try {
                ObjectInputStream objectInput = new ObjectInputStream(socket.getInputStream());
                try {
                    Object object =(Student) objectInput.readObject();
                    Student tmp = (Student) object;
                    tmp.Print();
                } catch (ClassNotFoundException e) {
                    e.printStackTrace();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }           
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }   
    }   
}

我将它们移动到同一个文件并添加了序列化 ID.它工作正常.

推荐答案

只有两个同名的类是不够的.这两个类需要有