package com.dji.sample.speak.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Util {
    public static String getMD5Checksum(File file) {
        try (InputStream fis = new FileInputStream(file)) {
            MessageDigest md = MessageDigest.getInstance("MD5");
            byte[] buffer = new byte[1024];
            int bytesRead;

            while ((bytesRead = fis.read(buffer)) != -1) {
                md.update(buffer, 0, bytesRead);
            }

            byte[] digest = md.digest();
            StringBuilder sb = new StringBuilder();
            for (byte b : digest) {
                sb.append(String.format("%02x", b));
            }
            return sb.toString();
        } catch (IOException | NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;
        }
    }
}