code: public static String MD5Encode(String origin) {
  		String resultString = null;
  		try {
  			resultString = origin;
  			MessageDigest md = MessageDigest.getInstance("MD5");
  			md.update(resultString.getBytes("UTF-8"));
  			resultString = byteArrayToHexString(md.digest());
  		} catch (Exception e) {
  			throw new RuntimeException(e);
  		}
  		return resultString;
  	}
docs: MD5编码
  
  @param origin
  原始字符串
  @return 经过MD5加密之后的结果