发送ArrayList< String>从服务器端到客户端通过TCP使用套接字？ [英] Sending an ArrayList<String> from the server side to the client side over TCP using socket?

问题描述

我正在尝试通过TCP将一个对象从服务器端套接字发送到客户端套接字。我无法找出问题所在。

I'm trying to send one object from the server side socket to the client side socket over TCP. I can't find out where is the problem.

以下是我在客户端遇到的错误：

Here is the error I'm getting on the Client side:

java.io.EOFException
    at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2280)
    at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2749)
    at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:779)
    at java.io.ObjectInputStream.<init>(ObjectInputStream.java:279)
    at ClientSide.main(ClientSide.java:16)

服务器端代码：

import java.io.*;
import java.net.*;
import java.util.ArrayList;

public class ServerSide {

    public static void main(String[] args) {
        try
        {
            ServerSocket myServerSocket = new ServerSocket(9999);
            Socket skt = myServerSocket.accept();   
            ArrayList<String> my =  new ArrayList<String>();
            my.set(0,"Bernard");
            my.set(1, "Grey");
            try 
            {
                ObjectOutputStream objectOutput = new ObjectOutputStream(skt.getOutputStream());
                objectOutput.writeObject(my);               
            } 
            catch (IOException e) 
            {
                e.printStackTrace();
            } 
        }
        catch (IOException e) 
        {
            e.printStackTrace();
        }
    }

}

代码客户端：

import java.io.*;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.ArrayList;


public class ClientSide {

    public static void main(String[] args)
    {
        try {       
            Socket socket = new Socket("10.1.1.2",9999);
            ArrayList<String> titleList = new ArrayList<String>();
            try {
                ObjectInputStream objectInput = new ObjectInputStream(socket.getInputStream()); //Error Line!
                try {
                    Object object = objectInput.readObject();
                    titleList =  (ArrayList<String>) object;
                    System.out.println(titleList.get(1));
                } catch (ClassNotFoundException e) {
                    System.out.println("The title list has not come from the server");
                    e.printStackTrace();
                }
            } catch (IOException e) {
                System.out.println("The socket for reading the object has problem");
                e.printStackTrace();
            }           
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }   
    }   
}

推荐答案

从设置更改添加可以解决这个问题

Changing from set to add does the trick

ArrayList<String> my =  new ArrayList<String>();
my.add("Bernard");
my.add("Grey");

ps。根据其他人的建议，这不是一个好主意，但仅用于学习

ps. as advised by the others this is not a good idea but, use only for learning

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