MD5算法的一个实现
/** * MD5算法 */public class MD5 {/** * 获取MD5 结果字符串 * * @param source * @return */public static String encode(byte[] source) {String s = null;char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };try {java.security.MessageDigest md = java.security.MessageDigest.getInstance("MD5");md.update(source);byte tmp[] = md.digest(); char str[] = new char[16 * 2]; int k = 0; for (int i = 0; i < 16; i++) { byte byte0 = tmp[i]; str[k++] = hexDigits[byte0 >>> 4 & 0xf]; str[k++] = hexDigits[byte0 & 0xf]; }s = new String(str); } catch (Exception e) {e.printStackTrace();}return s;}public static String getMD5(String source) {return (source == null || "".equals(source)) ? "" : getMD5(source);}}