Java与Linux的Sha256校验和比较

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Sha256Example {
    public static void main(String[] args) {
        String data = "Hello, World!";
        
        try {
            MessageDigest digest = MessageDigest.getInstance("SHA-256");
            byte[] hash = digest.digest(data.getBytes());
            
            StringBuilder hexString = new StringBuilder();
            for (byte b : hash) {
                String hex = Integer.toHexString(0xff & b);
                if (hex.length() == 1) {
                    hexString.append('0');
                }
                hexString.append(hex);
            }
            
            System.out.println("Sha256 hash: " + hexString.toString());
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
    }
}

echo -n "Hello, World!" | sha256sum