package com.pingcap.fuction;

public class ReaderUtils {
    public static String bytesToHexString(byte[] src, int start, int len) {
        StringBuilder stringBuilder = new StringBuilder("");
        if (src == null || len <= 0) {
            return null;
        }
        for (int i = start; i < start + len; i++) {
            int v = src[i] & 0xFF;
            String hv = Integer.toHexString(v).toUpperCase();
            if (hv.length() < 2) {
                stringBuilder.append(0);
            }
            stringBuilder.append(hv);
        }
        return stringBuilder.toString();
    }
}