【求助】RSA可以通过模数和指数来还原私钥么?

RT
因为看到java里面有方法可以:
RSAPrivateKeySpec spec = new RSAPrivateKeySpec(mod, exp);
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
java.security.PrivateKey signKey = keyFactory.generatePrivate(spec);
所以想求解过程