Java编写的聊天应用程序

import java.io.*; import java.net.*; import java.util.Date; import javax.swing.*; import java.awt.*; import java.awt.event.*; public class ServerFrame extends JFrame implements ActionListener{ /** * */ private static final long serialVersionUID = 1L; JLabel l1=new JLabel("聊天："), l2=new JLabel(""); JTextArea chatLog=new JTextArea(15,50), reslutlog=new JTextArea(5,50), note=new JTextArea(5,50); JButton sendBut=new JButton("发送"), getBut=new JButton("查看聊天记录"); ServerSocket server=null; Socket socket=null; BufferedReader is;//读缓冲区，用于获取另一端发来的信息 PrintWriter os;//输出流，完成向另一端发送信息 ServerFrame(){ super("服务器端程序"); this.setLayout(new FlowLayout(FlowLayout.LEFT)); this.add(l1); this.add(new JScrollPane(chatLog)); this.add(new JScrollPane(reslutlog)); this.add(new JScrollPane(note)); this.add(sendBut); sendBut.addActionListener(this); this.add(getBut); getBut.addActionListener(this); this.addWindowListener(new WindowAdapter(){//在关闭窗体的时候，关闭输入输出流和套接字 public void windowClosing(WindowEvent e) { try { is.close(); socket.close(); server.close(); } catch (IOException e1) { // TODO 自动生成 catch 块 e1.printStackTrace(); } } }); this.setBounds(100,100,580,560); this.setResizable(false); this.setVisible(true); this.setDefaultCloseOperation(3); try { server=new ServerSocket(4700);//创建服务器 socket=server.accept();//等待客户端接入 os=new PrintWriter(socket.getOutputStream()); is=new BufferedReader(new InputStreamReader(socket.getInputStream())); //******************************************************************************* String s=is.readLine(); if((s!=null)&&(!s.equals(""))) chatLog.append("客户说："+s.toString()+"\n"); } catch (IOException e) { // TODO 自动生成 catch 块 e.printStackTrace(); } } public void actionPerformed(ActionEvent e) { if(e.getSource()==getBut){ if(chatLog.getText().trim().length()==0) { return; } else { try { String L=is.readLine(); if((L!=null)&&(!L.equals(""))) reslutlog.append("客户说："+L.toString()+"\n"); } catch (IOException e1) { JOptionPane.showMessageDialog(null,"读取消息失败！","提示",JOptionPane.ERROR_MESSAGE); } } } else if(e.getSource()==sendBut){ os.println(note.getText().trim()+" "+new Date().toLocaleString()); os.flush(); chatLog.append("我说："+note.getText().trim()+" "+new Date().toLocaleString()+"\n"); } } public static void main(String args[]){ new ServerFrame(); } }