用java实现nc功能实例

<script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> </script> /* socket编程实例 一个用java实现nc的功能的小例子 请各位高手指教：shengshuai@126.com */ import java.net.*; import java.io.*; import javax.swing.event.*; import javax.swing.*; import java.awt.*; import java.awt.event.*; import javax.swing.UIManager; import javax.swing.plaf.metal.MetalLookAndFeel; public class fs { public fs() { fsframe Frame1 = new fsframe(); Frame1.validate(); Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); Dimension frameSize = Frame1.getSize(); if (frameSize.height > screenSize.height) { frameSize.height = screenSize.height; } if (frameSize.width > screenSize.width) { frameSize.width = screenSize.width; } Frame1.setLocation((screenSize.width - frameSize.width)/2,(screenSize.height - frameSize.height)/2); //Frame1.setlocation(0,0); Frame1.setDefaultCloseOperation(3); Frame1.show(); } public static void main(String[] args) { try { UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel"); }catch(Exception e) { e.printStackTrace(); } new fs(); } } class fsframe extends JFrame { String indata = null; DataInputStream in; DataOutputStream out; Socket conn; JLabel la = new JLabel("请输入："); JButton lianjie = new JButton("连接"); JButton act = new JButton("执行"); JTextField hostfield = new JTextField("www.126.com",10); JTextField portfield = new JTextField("80",2); JTextArea log = new JTextArea(10,0); JTextArea input = new JTextArea(4,0); JPanel contorlpanel = new JPanel(); JPanel inputPanel = new JPanel(); JScrollPane logscrollpane = new JScrollPane(); JScrollPane inputsrollpane = new JScrollPane(); public fsframe() { setSize(Toolkit.getDefaultToolkit().getScreenSize().width/2,380); try { this.setResizable(false); this.getContentPane().setLayout(new BorderLayout()); this.setBackground(Color.red); log.setText(""); log.setEditable(false); logscrollpane.getViewport().add(log); this.getContentPane().add(logscrollpane,BorderLayout.NORTH); contorlpanel.setLayout(new FlowLayout()); contorlpanel.add(la); contorlpanel.add(hostfield); contorlpanel.add(portfield); contorlpanel.add(lianjie); contorlpanel.add(act); this.getContentPane().add(contorlpanel,BorderLayout.CENTER); inputsrollpane.getViewport().add(input); this.getContentPane().add(inputsrollpane,BorderLayout.SOUTH); lianjie.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ String host = hostfield.getText(); int port = Integer.parseInt(portfield.getText()); if(host.equals("")||(portfield.getText().equals(""))) JOptionPane.showMessageDialog(null, "主机和端口为空！"); log.append("正在连接……/n"); try{ conn = new Socket(InetAddress.getByName(host),port); in = new DataInputStream(conn.getInputStream()); out = new DataOutputStream(conn.getOutputStream()); log.append("已经连接至主机" host "端口：" port "/n"); //while((indata=in.readLine())!="") log.append(indata); }catch(UnknownHostException un) { log.append("UnknownHostException:" un "/n"); JOptionPane.showMessageDialog(null, un); }catch(IOException iod) { log.append("IOException:" iod "/n"); JOptionPane.showMessageDialog(null,iod); } } }); act.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent ac){ try{ log.append(input.getText() "/n"); out.writeBytes(input.getText()); out.writeBytes("/n"); input.setText(""); if((indata=in.readLine())!="") log.append(indata); }catch(IOException iod) { log.append("IOException:" iod "/n"); JOptionPane.showMessageDialog(null,iod); } } }); }catch(Exception e) { log.append("Exception" e); } } }