package com.inspect.nvr.utils;

import lombok.extern.slf4j.Slf4j;

import java.nio.charset.StandardCharsets;

@Slf4j
public class StringHexConverter {
    // 字符串 -> 十六进制字符串
    public static String toHex(String input) {
        byte[] bytes = input.getBytes(StandardCharsets.UTF_8);
        StringBuilder hex = new StringBuilder(bytes.length * 2);
        for (byte b : bytes) {
            hex.append(String.format("%02x", b));
        }
        return hex.toString();
    }

    // 十六进制字符串 -> 原始字符串
    public static String fromHex(String hex) {
        int length = hex.length();
        byte[] bytes = new byte[length / 2];
        for (int i = 0; i < length; i += 2) {
            bytes[i / 2] = (byte) Integer.parseInt(hex.substring(i, i + 2), 16);
        }
        return new String(bytes, StandardCharsets.UTF_8);
    }
}