//DES 加密类：
?
public class DES {
?private static final String PASSWORD_CRYPT_KEY = "__jDlog_";
?private final static String DES = "DES";
?/**
? * 加密/解密
? *
? * @param src
? *??????????? 数据源
? * @param key
? *??????????? 密钥，长度必须是8的倍数
? * @return 返回加密后的数据
? * @throws Exception
? */
?public static byte[] des(byte[] src, byte[] key, Mode type)
???throws Exception {
??// DES算法要求有一个可信任的随机数源
??SecureRandom sr = new SecureRandom();
??// 从原始密匙数据创建DESKeySpec对象
??DESKeySpec dks = new DESKeySpec(key);
??// 创建一个密匙工厂，然后用它把DESKeySpec转换成
??// 一个SecretKey对象
??SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
??SecretKey securekey = keyFactory.generateSecret(dks);
??// Cipher对象实际完成加密操作
??Cipher cipher = Cipher.getInstance(DES);
??// 用密匙初始化Cipher对象
??
??if (type.toString().equals(Mode.ENCRYPT.toString()))
???cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
??else
???cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
??// 现在，获取数据并加密
??// 正式执行加密操作
??return cipher.doFinal(src);
?}
?
?public static void main(String[] args) throws Exception {
??//加密
??byte[] b = des("admin".getBytes(),"12345678".getBytes(),Mode.ENCRYPT);
??
??//解密
??b = des(b,"12345678".getBytes(),Mode.DECRYPT);
??System.out.println(new String(b));
?}
}
?
?
?
//MD5 加密：
?
public class MD5 {
?public static String getMd5(String source) {
??try {
???MessageDigest messageDigest = MessageDigest.getInstance("MD5");
???byte[] b = messageDigest.digest(source.getBytes("utf-8"));
???BASE64Encoder base64en = new BASE64Encoder();
???return base64en.encode(b);
??} catch (Exception e) {
???throw new RuntimeException("not support md5");
??}
?}
? public static void main(String[] args) {
?? String result = MD5.getMd5("ISMvKXpXpadDiUoOSoAfww==");
?? System.out.println(result);
??
?}
}