package com.swift;

import java.io.DataInputStream;

import java.io.IOException;

import java.net.ServerSocket;

import java.net.Socket;

public class ChatServer {

    public static void main(String[] args) {

        boolean started=false;

        ServerSocket ss=null;

        DataInputStream dis=null;

        Socket s = null;

        try {

            ss = new ServerSocket(8888);

            started=true;

        } catch (IOException e1) {

            // TODO Auto-generated catch block

            e1.printStackTrace();

        }

        try {

            while(started) {

                boolean connected=false;

                s = ss.accept();

                connected=true;

                System.out.println("a client connected success");

                dis=new DataInputStream(s.getInputStream());

                while(connected) {

                String str=dis.readUTF();

                System.out.println(str);

                }

            }

        } catch (Exception e) {

            //e.printStackTrace();

            System.out.println("client has closed.");

        }finally {

            if(dis!=null) {

                try {

                    dis.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

            if(s!=null) {

                try {

                    s.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

        }

    }

}

package com.swift;

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.io.DataOutputStream;

import java.io.IOException;

import java.net.Socket;

import java.net.UnknownHostException;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.JTextField;

public class ChatClientFrame extends JFrame {

    private static final long serialVersionUID = -118470059355655240L;

    Socket s=null;

    DataOutputStream dos=null;

    JLabel label_shang=new JLabel();

    JLabel label_xia=new JLabel();

    JTextField tf = new JTextField(38);

    JTextArea ta = new JTextArea(15, 50);

    JButton button=new JButton();

    public ChatClientFrame() {

        setBounds(200, 200, 500, 400);

        setTitle("客户端聊天工具 —— 0.6");

        //对窗口进行大的布局，分为三行一列，在pBasic面板上添加三个面板shang zhong xia

        JPanel pBasic=new JPanel();

        pBasic.setLayout(new BorderLayout());//不设置默认也是这种布局模式

        setContentPane(pBasic);//把面板放在窗口上，不记得用this.关键字

        JPanel shang=new JPanel();

        JPanel zhong=new JPanel();

        JPanel xia=new JPanel();

        //设置JPanel面板的大小

        shang.setSize(470, 25);

        zhong.setSize(470, 180);

        xia.setSize(470, 40);

        pBasic.add(shang,BorderLayout.NORTH);

        pBasic.add(zhong,BorderLayout.CENTER);

        pBasic.add(xia,BorderLayout.SOUTH);

        shang.setBackground(Color.red);

        zhong.setBackground(Color.yellow);

        xia.setBackground(Color.blue);

        label_shang.setText("聊天记录");

        shang.add(label_shang);

        ta.setLineWrap(true);// 自动换行

        JScrollPane scroll=new JScrollPane(ta);// 增加滚动条，以便不增加行数

        zhong.add(scroll);

        label_xia.setText("输入信息");

        xia.add(label_xia,BorderLayout.WEST);

        /*

         * 增加功能，窗口监听事件，窗口打开时设置光标焦点在tf文本域中

         */

        this.addWindowListener(new WindowAdapter() {

            @Override

            public void windowOpened(WindowEvent e) {

                tf.requestFocus();

            }

        });

        xia.add(tf,BorderLayout.CENTER);

        button.setText("发送");

        xia.add(button,BorderLayout.EAST);

        final class ShareListener implements ActionListener{

            @Override

            public void actionPerformed(ActionEvent e) {

                String taText=ta.getText();

                String tfText=tf.getText()+"\r\n";

                String tfText1=tf.getText();

                ta.setText(taText+tfText);

                tf.setText("");

                //当回车或发送按钮时，tfText发送到服务器

                try {

                    dos.writeUTF(tfText1);

                    dos.flush();

                } catch (IOException e1) {

                    e1.printStackTrace();

                }

            }

        }

        button.addActionListener(new ShareListener());

        tf.addActionListener(new ShareListener());

        //通过压缩自动调整各个面板

        pack();

        this.addWindowListener(new WindowAdapter() {

            @Override

            public void windowClosing(WindowEvent e) {

                disconnect();

                System.exit(0);

            }

        });

        setVisible(true);

        //创建窗体直接调用连接服务器

        connect();

    }

    public void connect() {

        try {

            s=new Socket("127.0.0.1",8888);

            System.out.println("connected!");

            dos=new DataOutputStream(s.getOutputStream());

        } catch (UnknownHostException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

    public void disconnect() {

        try {

            dos.close();

            s.close();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

    public static void main(String[] args) {

        new ChatClientFrame();

    }

}