用JAVA寫個簡單的聊天室-單人版

先整理下思路：
1.創建一個通信服務端，傳入端口號和相關的流後等待客戶端連接，並初始化圖形界面。
2.創建一個JFrame，用於寫出聊天的界面，這裏界面名稱由其他類傳入。
3.把客戶端創建的方法寫進JFrame（當然這裏很粗糙的方法）
4.設置按鈕的監聽事件，發送消息和離線功能
首先創建一個服務端的類

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import com.jero.jframe.ChatSocketJFrame;
//創建服務端
public class ChatServerSocket{
    //構造初始化方法
    public ChatServerSocket(String name,int port) throws IOException{
        //創建Socket服務連接對象    
            ServerSocket serverSocket = new ServerSocket(port);
        //等待客戶端連接
            Socket client = serverSocket.accept();
        //初始化聊天界面   
            try {
                new ChatSocketJFrame(name,client);
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        //關閉流
            serverSocket.close();
    }
    public static void main(String[] args) throws Exception{
        new ChatServerSocket("服務端",8001);//啓動服務端，指定網名和端口
    }

}





package com.jero.jframe;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.border.EmptyBorder;

import com.jero.socket.ChatServerSocket;

import javax.swing.JTextPane;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.JTextArea;

public class ChatSocketJFrame extends JFrame implements ActionListener {
    private Socket socket;
    private String name;
    private JButton BT_SEND,BT_LEAVE,BT_LOGIN;
    private JTextArea textArea;
    private JPanel contentPane;
    private JTextField textField;
    private PrintWriter cout;
    /**
     * Launch the application.
     * @throws Exception 
     * @throws IOException 
     * @throws UnknownHostException 
     */
    public static void main(String[] args) throws UnknownHostException, IOException, Exception {
        //實例化界面以及客戶端
        new ChatSocketJFrame("客戶端","127.0.0.1",8001);
    }

    /**
     * Create the frame.
     */
    public ChatSocketJFrame(String name, Socket socket)throws Exception, IOException {
        //聊天室界面
        super("聊天室"+name+" "+InetAddress.getLocalHost()+" "+socket.getPort());
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 733, 519);
        this.textArea = new JTextArea();
        this.textArea.setEditable(false);
        this.getContentPane().add(new JScrollPane(this.textArea));
        JPanel panel = new JPanel();
        this.getContentPane().add(panel, "South");
        this.textField = new JTextField(16);
        panel.add(this.textField);
        BT_SEND = new JButton("發送");
        panel.add(BT_SEND);
        BT_SEND.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
                System.out.println("按鈕已點擊");
                cout.println(name+"說:  "+textField.getText()+"\n");
                textArea.append("我說:  "+textField.getText()+"\n");
                textField.setText("");
            }
        });
        BT_LEAVE = new JButton("離線");
        panel.add(BT_LEAVE);
        BT_LEAVE.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
                textArea.append("我離線");
                cout.println(name+"離線\n"+"bye");
                BT_LEAVE.setEnabled(false);
                BT_SEND.setEnabled(false);
            }
        });
        this.setVisible(true);
        //開始創建通信
        this.socket = socket;
        this.name = name;
        //獲得Socket的輸出流並立即刷新
        this.cout = new PrintWriter(socket.getOutputStream(),true);
        //把網名傳給對方
        this.cout.println(name);
        //獲得Socket對象的輸入流，創建字符輸入流
        BufferedReader buff = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        //接受對方的網名
        String aline = buff.readLine();
        //顯示對方發送的內容
        textArea.append("連接"+aline+"成功！！\n");
        aline = buff.readLine();
        //如果內容不爲空並且對方不離線，則相互傳送消息
        while(aline!=null&&!aline.equals("bye")){

            textArea.append(aline+"\r\n");
            aline = buff.readLine();
        }
        //當對方離線時，關閉所有的流
        buff.close();
        cout.close();
        socket.close();
        //把按鈕設置爲不可操作
        BT_SEND.setEnabled(false);
        BT_LEAVE.setEnabled(false);
    }


    /**
     * @wbp.parser.constructor
     */
    public ChatSocketJFrame(String name,String host,int port) throws UnknownHostException, IOException, Exception{
        //創建客戶端
        this(name,new Socket(host,port));
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        // TODO Auto-generated method stub
        //可以把動作監聽寫進此函數，這個就不演示了
    }
}