Java等同于'openssl rsautl -verify -out‘

import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.security.KeyFactory;
import java.security.PublicKey;
import java.security.Signature;
import java.security.spec.X509EncodedKeySpec;

public class RSASignatureVerification {
    public static void main(String[] args) throws Exception {
        // 加载公钥
        Path publicKeyPath = Paths.get("public_key.pem");
        byte[] publicKeyBytes = Files.readAllBytes(publicKeyPath);
        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(publicKeyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        PublicKey publicKey = keyFactory.generatePublic(keySpec);

        // 初始化Signature对象
        Signature signature = Signature.getInstance("SHA256withRSA");
        signature.initVerify(publicKey);

        // 加载要验证的数据
        Path dataPath = Paths.get("data.txt");
        byte[] dataBytes = Files.readAllBytes(dataPath);

        // 更新数据
        signature.update(dataBytes);

        // 验证数字签名
        Path signaturePath = Paths.get("signature.bin");
        byte[] signatureBytes = Files.readAllBytes(signaturePath);
        boolean verified = signature.verify(signatureBytes);

        if (verified) {
            System.out.println("数字签名验证成功");
        } else {
            System.out.println("数字签名验证失败");
        }
    }
}