import java.security.NoSuchAlgorithmException;import javax.crypto.BadPaddingException;import javax.crypto.Cipher;import javax.crypto.IllegalBlockSizeException;import javax.crypto.KeyGenerator;import javax.crypto.KeyGeneratorSpi;import javax.crypto.NoSuchPaddingException;import javax.crypto.SecretKey;import javax.security.auth.kerberos.KerberosKey;import javax.tools.JavaCompiler;public class MyJavaDES { public static void main(String[] args) { Cipher c; MyJavaDES jd = new MyJavaDES(); String str ="激發憤怒典故"; try { c = Cipher.getInstance("DES"); KeyGenerator Keygen; Keygen = KeyGenerator.getInstance("DES"); SecretKey desKey; desKey = Keygen.generateKey(); c.init(Cipher.ENCRYPT_MODE,desKey ); byte[] src = str.getBytes(); byte[] CipherByte1; CipherByte1 = c.doFinal(src); System.out.println("加密以后"+new String(CipherByte1)); c.init(Cipher.ENCRYPT_MODE,desKey ); byte[] CipherByte2; CipherByte2 = c.doFinal(CipherByte1); System.out.println("解密以后"+new String(CipherByte2)); }catch (InvalidKeyException e){ e.printStackTrace(); }catch (IllegalBlockSizeException e){ e.printStackTrace(); }catch (BadPaddingException e){ e.printStackTrace(); }catch (NoSuchAlgorithmException e){ e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } }}