乐工具技术知识OrientDB ??????? NoSQL ???,????????,????????????? OrientDB ?,???????????????????????????????????,????????:
- ????????:?????????? OrientDB ??,????????(?? MD5 ? SHA-1)???????????????,???????????????????,???????????????????,??????????
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public static String calculateHash(byte[] data) {
try {
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(data);
byte[] hashBytes = md.digest();
StringBuilder sb = new StringBuilder();
for (byte b : hashBytes) {
sb.append(String.format("x", b));
}
return sb.toString();
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("Error calculating hash", e);
}
}
- ?? OrientDB ?????:OrientDB ?????????,?
MD5()?SHA1(),???????????????????????????????,????????????????(??,?? Base64 ??),?????????
-- ?????????? MD5 ???
INSERT INTO binary_data (id, content, md5) VALUES (1, 'base64EncodedString', MD5('base64EncodedString'));
-- ??????? MD5 ???
SELECT id, content, MD5(content) AS computed_md5 FROM binary_data WHERE id = 1;
- ??????:?????????????????????????????,Java ??? Apache Commons Codec ?,??????? Base64 ??? MD5 ???
??,???? OrientDB ???????,???????????????,?????????????????????????????????????
