Java实现DES加密解密代码

import java.io.IOException; import java.io.Serializable; import java.security.InvalidKeyException; import java.security.NoSuchAlgorithmException; http://www.kmnk03.com/hxpfk/bdf/264.html import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.KeyGenerator; import javax.crypto.NoSuchPaddingException; import javax.crypto.SealedObject; import javax.crypto.SecretKey; http://www.kmnk03.com/hxpfk/qcd/265.html public class EncryptDecryptObjectWithDES { private static Cipher ecipher; private static Cipher dcipher; private static SecretKey key; public static void main(String[] args) { try {http://www.kmnk03.com/hxpfk/qcd/266.html // generate secret key using DES algorithm key = KeyGenerator.getInstance("DES").generateKey(); ecipher = Cipher.getInstance("DES"); dcipher = Cipher.getInstance("DES"); // initialize the ciphers with the given key ecipher.init(Cipher.ENCRYPT_MODE, key); dcipher.init(Cipher.DECRYPT_MODE, key); // create a sealed object SealedObject sealed = new SealedObject(new SecretObject("My secret message"), ecipher); http://www.kmnk03.com/hxpfk/pfsy/268.html // get the algorithm with the object has been sealed String algorithm = sealed.getAlgorithm(); System.out.println("Algorithm " + algorithm); // unseal (decrypt) the object SecretObject o = (SecretObject) sealed.getObject(dcipher); System.out.println("Original Object: " + o); }http://www.kmnk03.com/hxpfk/xmz/269.html catch (NoSuchAlgorithmException e) { System.out.println("No Such Algorithm:" + e.getMessage()); return; } catch (NoSuchPaddingException e) { System.out.println("No Such Padding:" + e.getMessage()); return; } catch (BadPaddingException e) { System.out.println("Bad Padding:" + e.getMessage()); return; }http://www.kmnk03.com/hxpfk/qcd/267.html catch (InvalidKeyException e) { System.out.println("Invalid Key:" + e.getMessage()); return; } catch (IllegalBlockSizeException e) { System.out.println("Illegal Block:" + e.getMessage()); return; } catch (ClassNotFoundException e) { System.out.println("Class Not Found:" + e.getMessage()); return; }http://www.kmnk03.com/hxpfk/tf/270.html catch (IOException e) { System.out.println("I/O Error:" + e.getMessage()); return; } http://www.kmnk03.com/hxpfk/npx/273.html } public static class SecretObject implements Serializable { private static final long serialVersionUID = -1335351770906357695L; private final String message; http://www.kmnk03.com/hxpfk/ylb/271.html public SecretObject(String message) { this.message = message; } @Override public String toString() { return "SecretObject [message=" + message + "]"; } } http://www.kmnk03.com/hxpfk/ylb/272.html }kmnk03.com www.kmnk03.com 复制代码 输出： Algorithm DES Original Object: SecretObject [message=My secret message]