RSA使用SpongyCastle

最终使用以下方法解决了该问题：

private void stripHeaders(){    public_key = public_key.replace("-----BEGIN PUBLIC KEY-----", "");    public_key = public_key.replace("-----END PUBLIC KEY-----", "");}public byte[] encryptWithPublicKey(String encrypt) throws Exception {    byte[] message = encrypt.getBytes("UTF-8");    stripHeaders();     PublicKey apiPublicKey= getRSAPublicKeyFromString();     Cipher rsaCipher = Cipher.getInstance("RSA/None/PKCS1Padding", "SC");    rsaCipher.init(Cipher.ENCRYPT_MODE, apiPublicKey);     return rsaCipher.doFinal(message);}private PublicKey getRSAPublicKeyFromString() throws Exception{    KeyFactory keyFactory = KeyFactory.getInstance("RSA", "SC");     byte[] publicKeyBytes = base64.depre(public_key.getBytes("UTF-8"), base64.DEFAULT);     X509EnpredKeySpec x509KeySpec = new X509EnpredKeySpec(publicKeyBytes);     return keyFactory.generatePublic(x509KeySpec);}