Method sign

src/main/java/com/github/utils/Rsa.java:62–73

(String str, String str2)

    }

    public static String sign(String str, String str2) {
        try {
            PrivateKey generatePrivate = KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(Base64.decode(str2)));
            Signature signature = Signature.getInstance("SHA1WithRSA");
            signature.initSign(generatePrivate);
            signature.update(str.getBytes("utf-8"));
            return Base64.encode(signature.sign());
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) {
        String encrypt = Rsa.encrypt("123456");