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/*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);}}}
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