java digestutils怎样提高计算效率

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1. ?????????:DigestUtils????????,?MD5?SHA-1?SHA-256???????????????????????,SHA-256??????MD5?SHA-1?

2. ????:??????????????,???????????,?????????,??????????????????????????

3. ?????:???????????????,?????????,????????????????????????????????,???????

4. ??Java???:Java 8???java.security.MessageDigest?,??????Java??????????????????????,??????????

????:

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;

public class DigestUtils {
    public static void main(String[] args) throws NoSuchAlgorithmException {
        String data = "https://www.yisu.com/ask/Hello, world!";
        String md5Hash = calculateHash(data, "MD5");
        String sha256Hash = calculateHash(data, "SHA-256");

        System.out.println("MD5: " + md5Hash);
        System.out.println("SHA-256: " + sha256Hash);
    }

    public static String calculateHash(String data, String algorithm) throws NoSuchAlgorithmException {
        MessageDigest messageDigest = MessageDigest.getInstance(algorithm);
        byte[] hashBytes = messageDigest.digest(data.getBytes(StandardCharsets.UTF_8));
        return bytesToHex(hashBytes);
    }

    private static String bytesToHex(byte[] bytes) {
        StringBuilder sb = new StringBuilder();
        for (byte b : bytes) {
            sb.append(String.format("x", b));
        }
        return sb.toString();
    }
}

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