Java加密解密器

今天用Java类里自带的编码解码做了 一个加密解密器。其实我没做什么就是做了个界面。

还有key是固定八个字符，我改成不是八个字符也可以了。

import java.awt.BorderLayout;import java.awt.FlowLayout;import java.awt.HeadlessException;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.crypto.Cipher;import javax.crypto.SecretKey;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESKeySpec;import javax.crypto.spec.IvParameterSpec;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.JTextField;public class Encrypt extends JFrame{private static final long serialVersionUID = 1L;JLabel lb1 = new JLabel("原文:");JTextArea txt = new JTextArea(8,35);JScrollPane jsTxt = new JScrollPane(txt);JLabel lb = new JLabel("KEY:");JTextField pwd = new JTextField(10);JButton encry = new JButton("加密");JButton decry = new JButton("解密");JLabel lb2 = new JLabel("加/解密后:");JTextArea showArea = new JTextArea(8,35);JScrollPane jsShowArea = new JScrollPane(showArea);public Encrypt(String title) throws HeadlessException {super(title);}public static void main(String[] args) {new Encrypt("Encrypt").start();}public void start(){JPanel topPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));JPanel leftPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));JPanel rightPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));JPanel downPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));BorderLayout layout = new BorderLayout(5,5);this.setLayout(layout);this.setSize(400, 395);topPanel.add(lb1);topPanel.add(jsTxt);this.add("North", topPanel);leftPanel.add(lb);leftPanel.add(pwd);this.add("West", leftPanel);rightPanel.add(encry);encry.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubif(txt.getText().length()==0){JOptionPane.showMessageDialog(null, "加密内容不能为空", "提示", JOptionPane.INFORMATION_MESSAGE);return ;}showArea.setText(encrypt(txt.getText(),pwd.getText()));}});rightPanel.add(decry);decry.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {// TODO Auto-generated method stubif(txt.getText().length()==0){JOptionPane.showMessageDialog(null, "解密内容不能为空", "提示", JOptionPane.INFORMATION_MESSAGE);return ;}showArea.setText(decrypt(txt.getText(),pwd.getText()));}});this.add("East", rightPanel);downPanel.add(lb2);downPanel.add(jsShowArea);this.add("South", downPanel);this.setResizable(false);this.setVisible(true);this.setLocationRelativeTo(null);   this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}  /**     * 加密逻辑方法     * @param message     * @param key     * @return     * @throws Exception     */    private static byte[] encryptProcess(String message, String key) throws Exception {         Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");         DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));         SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");         SecretKey secretKey = keyFactory.generateSecret(desKeySpec);         IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));         cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);         return cipher.doFinal(message.getBytes("UTF-8"));     }        /**     * 解密逻辑方法     * @param message     * @param key     * @return     * @throws Exception     */     private static String decryptProcess(String message,String key) throws Exception {             byte[] bytesrc =convertHexString(message);             Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");             DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));             SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");             SecretKey secretKey = keyFactory.generateSecret(desKeySpec);             IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));             cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);             byte[] retByte = cipher.doFinal(bytesrc);             return new String(retByte);     }        /**     * 16进制数组数转化     * @param ss     * @return     */    private static byte[] convertHexString(String ss) throws Exception {         byte digest[] = new byte[ss.length() / 2];         for(int i = 0; i < digest.length; i++)         {         String byteString = ss.substring(2 * i, 2 * i + 2);         int byteValue = Integer.parseInt(byteString, 16);         digest[i] = (byte)byteValue;         }         return digest;     }        /**     * 十六进制数转化     * @param b     * @return     * @throws Exception     */    private static String toHexString(byte b[]) throws Exception {         StringBuffer hexString = new StringBuffer();         for (int i = 0; i < b.length; i++) {             String plainText = Integer.toHexString(0xff & b[i]);             if (plainText.length() < 2)                 plainText = "0" + plainText;             hexString.append(plainText);         }                    return hexString.toString();     }        private static String fixKey(String key){    if(key.length()>8){        key = key.substring(0, 8);        }else{        while(key.length()<8){        key+='0';        }        }    return key;    }    /**     * 加密方法     */    public static String encrypt(String message,String key){        String enStr = null;        if(key.length()!=8){        key = fixKey(key);        }        System.out.println(key+"......"+key.length());        try {             String orignStr=java.net.URLEncoder.encode(message, "utf-8");              enStr=toHexString(encryptProcess(orignStr, key));         } catch (Exception e) {            JOptionPane.showMessageDialog(null, "加密参数异常！", "错误", JOptionPane.OK_OPTION);        }        return enStr;    }            /**     * 解密方法     */    public static String decrypt(String message,String key){        String decStr = null;        if(key.length()!=8){        key = fixKey(key);        }        System.out.println(key+"......"+key.length());        try {            decStr = java.net.URLDecoder.decode(decryptProcess(message,key), "utf-8") ;        }catch (Exception e) {        JOptionPane.showMessageDialog(null, "解密参数异常！", "错误", JOptionPane.OK_OPTION);        }        return decStr;    }}

经过测试。确实可以加解密。