基于客户端通信的DES加密的java实现

import java.awt.EventQueue; import javax.swing.JFrame; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.border.EmptyBorder; import javax.swing.JLabel; import java.awt.Font; import javax.swing.JButton; import java.awt.event.ActionListener; import java.awt.event.ActionEvent; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.net.ServerSocket; import java.net.Socket; import java.net.UnknownHostException; import javax.swing.JScrollPane; import javax.swing.JTextArea; @SuppressWarnings("serial") public class CLient extends JFrame implements Runnable{ private JPanel contentPane; private int port;//设置的客户端端口号 private String sendToip;//要接收方的ip地址 private int sendToport;//要接受方的端口号 private String text;//要发送的明文 private String result; ServerSocket ss=null; private Socket socket=null; private Thread thread=null;//该线程打开特定的端口号等待连接 private DES des=null; /** * Launch the application. */ JTextArea resultArea; JTextArea mingwen; JTextArea ipArea; JTextArea portArea; JTextArea portSelf; public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { CLient frame = new CLient(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the frame. */ public CLient() throws Exception{ setTitle("\u52A0/\u89E3\u5BC6\u8F6F\u4EF6\u5BA2\u6237\u7AEF"); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(100, 100, 661, 483); contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); setContentPane(contentPane); contentPane.setLayout(null); JScrollPane scrollPane = new JScrollPane(); scrollPane.setBounds(10, 10, 625, 248); contentPane.add(scrollPane); resultArea = new JTextArea(); resultArea.setFont(new Font("Monospaced", Font.PLAIN, 16)); resultArea.setLineWrap(true); scrollPane.setViewportView(resultArea); mingwen = new JTextArea(); mingwen.setFont(new Font("Monospaced", Font.PLAIN, 18)); mingwen.setBounds(101, 387, 413, 34); contentPane.add(mingwen); des=new DES(); //为发送按钮添加消息响应函数 JButton sendbtn = new JButton("\u53D1\u9001"); sendbtn.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { text=mingwen.getText(); try { DataOutputStream dos=new DataOutputStream(socket.getOutputStream()); resultArea.setText(text); // 利用des进行加密并发送密文 des.setMingwen(text); try { byte []ctext=des.encrypt();//加密 int len; len=ctext.length; dos.writeInt(len); System.out.println("len="+len); dos.write(ctext, 0, len); } catch (Exception e1) { e1.printStackTrace(); } //dos.writeUTF(text); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } }); sendbtn.setFont(new Font("宋体", Font.PLAIN, 15)); sendbtn.setBounds(530, 387, 93, 34); contentPane.add(sendbtn); ipArea = new JTextArea(); ipArea.setFont(new Font("Monospaced", Font.PLAIN, 18)); ipArea.setBounds(154, 343, 174, 34); contentPane.add(ipArea); portArea = new JTextArea(); portArea.setFont(new Font("Monospaced", Font.PLAIN, 18)); portArea.setBounds(430, 343, 49, 34); contentPane.add(portArea); portSelf = new JTextArea(); portSelf.setFont(new Font("Monospaced", Font.PLAIN, 18)); portSelf.setBounds(217, 295, 93, 34); contentPane.add(portSelf); thread=new Thread(this); //点击设置后 JButton set = new JButton("\u8BBE\u7F6E"); set.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { port=Integer.parseInt(portSelf.getText()); thread.start(); } }); set.setFont(new Font("宋体", Font.PLAIN, 15)); set.setBounds(327, 289, 93, 34); contentPane.add(set); JLabel benjiPortLabel = new JLabel("\u5BA2\u6237\u7AEF\u7AEF\u53E3"); benjiPortLabel.setFont(new Font("宋体", Font.PLAIN, 14)); benjiPortLabel.setBounds(138, 289, 83, 34); contentPane.add(benjiPortLabel); JLabel sendToportLabel = new JLabel("\u53D1\u9001\u65B9IP"); sendToportLabel.setFont(new Font("宋体", Font.PLAIN, 14)); sendToportLabel.setBounds(88, 337, 56, 34); contentPane.add(sendToportLabel); JLabel mingwenLabel = new JLabel("\u660E\u6587"); mingwenLabel.setFont(new Font("宋体", Font.PLAIN, 14)); mingwenLabel.setBounds(57, 387, 34, 34); contentPane.add(mingwenLabel); JLabel sendToPortLabel = new JLabel("\u53D1\u9001\u65B9\u7AEF\u53E3"); sendToPortLabel.setFont(new Font("宋体", Font.PLAIN, 14)); sendToPortLabel.setBounds(338, 343, 70, 34); contentPane.add(sendToPortLabel); //为加密设置消息响应函数 JButton jiemibtn = new JButton("\u89E3\u5BC6"); jiemibtn.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { } }); jiemibtn.setFont(new Font("宋体", Font.PLAIN, 15)); jiemibtn.setBounds(473, 289, 118, 34); contentPane.add(jiemibtn); //为连接按钮添加消息响应函数 JButton connect = new JButton("\u8FDE\u63A5"); connect.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { sendToip=ipArea.getText();//目的IP sendToport=Integer.parseInt(portArea.getText());//目的端口号 try { socket=new Socket(sendToip,sendToport); JOptionPane.showMessageDialog(null, "connect success!"); } catch (UnknownHostException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } }); connect.setFont(new Font("宋体", Font.PLAIN, 15)); connect.setBounds(508, 343, 83, 34); contentPane.add(connect); } @Override public void run() { System.out.println(port+" is listening! please connect……"); try { ss=new ServerSocket(port); DataInputStream dis; while(true){ Socket s=ss.accept(); dis=new DataInputStream(s.getInputStream()); int len=0; len=dis.readInt(); System.out.println("len="+len); byte []ctext=new byte [len]; dis.read(ctext, 0, len); System.out.print(ctext); try { byte []ptext=des.Decrypt(ctext); String text="接收到的密文为:\n"+ctext+"\n转换后的明文:\n"; result=new String(ptext,"UTF8"); result=text+result; resultArea.setText(result); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } }