基于TCP的多人聊天小程序

要回家了，心就散了，毕业论文也做不下去了。闲着弄了弄Socket。同时遇到了一些问题。

服务端ChatServer.java

package com.neusoft.socket.chat;

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

public class ChatServer {
    // 存储不同客户端的线程
    public static Hashtable peopleList;

    public static void main(String args[]) {
        ServerSocket server = null;
        Socket socket = null;

        peopleList = new Hashtable();
        while (true) {
            try {
                // 建立服务端
                server = new ServerSocket(8099);
            } catch (IOException e) {
            }
            try {
                // 开始监听
                socket = server.accept();
                InetAddress address = socket.getInetAddress();
                System.out.println("IP:" + address + " come in.");

            } catch (IOException e) {
            }
            if (socket != null) {
                // 开启一条线程通讯
                new Server_thread(socket).start();
            } else {
                continue;
            }
        }
    }
}

服务端线程Server_thread.java

package com.neusoft.socket.chat;

import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.Socket;
import java.util.Enumeration;
import java.util.Hashtable;

public class Server_thread extends Thread {
    // 客户端机器名
    String name = null;

    String keyName = null;

    String message = null;

    Socket socket = null;

    ObjectOutputStream out = null;

    ObjectInputStream in = null;

    Hashtable peopleList = null;

    public Server_thread(Socket t) {
        socket = t;
        try {
            // 取得输入输出流对象
            in = new ObjectInputStream(socket.getInputStream());
            out = new ObjectOutputStream(socket.getOutputStream());
        } catch (IOException e) {
        }
    }

    public void run() {

        while (true) {

            try {
                // 读取客户端消息
                message = (String) in.readObject();
                // 把客户端线程存储到HASHTABLE
                name = socket.getInetAddress().toString();
                if (!ChatServer.peopleList.containsKey(name)) {
                    ChatServer.peopleList.put(name, this);
                }

                // 遍历HASHTABLE,把消息发送到每一个客户端,实现多人聊天
                Enumeration enum1 = ChatServer.peopleList.keys();
                while (enum1.hasMoreElements()) {
                    keyName = (String) enum1.nextElement();
                    ((Server_thread) ChatServer.peopleList.get(keyName)).out
                            .writeObject(keyName + "says:" + message);
                }
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            } catch (IOException ee) {
                ee.printStackTrace();
            }
        }
    }
}

客户端：Client.java

package com.neusoft.socket.chat;

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import javax.swing.*;

public class Client extends JFrame {
    private Container container;

    private JTextField enterField;

    private JTextArea displayArea;

    private ObjectOutputStream output;

    private ObjectInputStream input;

    private String message = "";

    private String chatServer;

    private Socket client;

    public Client(String host) {
        //初始化聊天窗口
        super("my Client");
        chatServer = host;
        container = getContentPane();
        enterField = new JTextField();
        enterField.setEnabled(false);
        enterField.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent event) {
                sendData(event.getActionCommand());
            }
        });
        container.add(enterField, BorderLayout.SOUTH);
        displayArea = new JTextArea();
        container.add(new JScrollPane(displayArea), BorderLayout.CENTER);
        setSize(500, 300);
        setLocation(200, 300);
        setVisible(true);
    }

    // 执行客户端
    public void runClient() {
        try {
            connectToServer();
            getStreams();
            processConnection();
            closeConnection();
        } catch (EOFException eofException) {
            System.out.println("Server