import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.security.MessageDigest; /** * Md5加密方法 * @author cz */ public class Md5Utils { private static final Logger log = LoggerFactory.getLogger(Md5Utils.class); private static byte[] md5(String s) { MessageDigest algorithm; try { algorithm = MessageDigest.getInstance("MD5"); algorithm.reset(); algorithm.update(s.getBytes("UTF-8")); byte[] messageDigest = algorithm.digest(); return messageDigest; } catch (Exception e) { log.error("MD5 Digest Error", e); } return null; } private static final String toHex(byte hash[]) { if (hash == null) { return null; } StringBuffer buf = new StringBuffer(hash.length * 2); int i; for (i = 0; i < hash.length; i++) { if ((hash[i] & 0xff) < 0x10) { buf.append("0"); } buf.append(Long.toString(hash[i] & 0xff, 16)); } return buf.toString(); } public static String hash(String s) { try { return new String(toHex(md5(s)).getBytes("UTF-8"), "UTF-8"); } catch (Exception e) { log.error("Error:not supported charset...{}", e); return s; } } }