java实现非对称加密

    public static void main(String[] args) throws Exception {
        //原文
        String txt = "abc";
        System.out.println("需要加密的原始数据"+txt);

        System.out.println();

        //获得密钥对Map
        Map<String, byte[]> keyMap = getKeyMap();
        //获得公钥
        String publicKeyStr = encryptBASE64(keyMap.get(PUBLIC_KEY));
        System.out.println("公钥\n\r"+publicKeyStr);

        //获得密钥
        String privateKeyStr = encryptBASE64(keyMap.get(PRIVATE_KEY));
        System.out.println("私钥\n\r"+privateKeyStr);

        //将私钥规范
        PrivateKey privateKey = restorePrivateKey(decryptBASE64(privateKeyStr));

        //将原文更利于私钥加密
        byte[] encodedText = RSAEncode(privateKey, txt.getBytes("UTF-8"));

        //私钥加密后的数据
        String privateResult = byteArrayToHexString(encodedText);
        System.out.println("加密后的256位数据\n\r"+privateResult);

        PublicKey publicKey = restorePublicKey(decryptBASE64(publicKeyStr));
        // 公钥解密
        System.out.println("公钥解密: " + RSADecode(publicKey, hexStringToByte(privateResult)));
    }