将十六进制编码的ESCDA私钥转换为Java PrivateKey接口

import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.util.Base64;

public class ECDSAPrivateKeyConverter {
    public static PrivateKey convertHexToPrivateKey(String hexPrivateKey) throws Exception {
        // 将十六进制编码的私钥转换为字节数组
        byte[] privateKeyBytes = hexStringToByteArray(hexPrivateKey);

        // 创建PKCS8EncodedKeySpec对象
        PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(privateKeyBytes);

        // 使用EC算法生成私钥对象
        KeyFactory keyFactory = KeyFactory.getInstance("EC");
        PrivateKey privateKey = keyFactory.generatePrivate(keySpec);

        return privateKey;
    }

    private static byte[] hexStringToByteArray(String hexString) {
        int length = hexString.length();
        byte[] byteArray = new byte[length / 2];
        for (int i = 0; i < length; i += 2) {
            byteArray[i / 2] = (byte) ((Character.digit(hexString.charAt(i), 16) << 4)
                    + Character.digit(hexString.charAt(i + 1), 16));
        }
        return byteArray;
    }

    public static void main(String[] args) throws Exception {
        String hexPrivateKey = "0123456789abcdef"; // 替换为实际的十六进制私钥

        PrivateKey privateKey = convertHexToPrivateKey(hexPrivateKey);
        System.out.println(privateKey);
    }
}