Java计算唯一文件MD5

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import java.security.MessageDigest;
import static org.apache.commons.codec.digest.MessageDigestAlgorithms.MD5;
public class TestFileClient {
    @Test
    public void test(){
        InputStream is = new FileInputStream(new File("/data/source.txt"));
        MessageDigest messageDigest = MessageDigest.getInstance(MD5);
        /*输入流转输出流*/
        byte[] buffer = new byte[1024];
        int len = 0;
        while ((len = is.read(buffer)) != -1) {
            messageDigest.update(buffer, 0, len);
        }
        String md5 = (new String(Hex.encodeHex(messageDigest.digest())));
    }
}

本文地址： https://github.com/maxzhao-it/blog/post/7e26006c/