private static byte[] sha1(byte[] data) {
		MessageDigest md = null;
		try {
			md = MessageDigest.getInstance(ALGORITHM_SHA1);
			md.reset();
			md.update(data);
			return md.digest();
		} catch (Exception e) {
			LogUtil.writeErrorLog("SHA1计算失败", e);
			return null;
		}
	}
private static byte [ ] sha1 ( byte [ ] data ) { MessageDigest md = null ; try { md = MessageDigest . getInstance ( ALGORITHM_SHA1 ) ; md . reset ( ) ; md . update ( data ) ; return md . digest ( ) ; } catch ( Exception e ) { LogUtil . writeErrorLog ( "SHA1计算失败" , e ) ; return null ; } }
sha1计算.

@param datas
待计算的数据
@return 计算结果