package org.yzh.commons.util;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;

/**
 * 字节操作工具类
 */
public class BytesUtils {

    /**
     * 十六进制字符串转字节数组
     */
    public static byte[] hex2bytes(String hex) {
        if (hex == null || hex.isEmpty()) {
            return new byte[0];
        }
        // 去除空格
        hex = hex.replace(" ", "");

        int len = hex.length();
        if (len % 2 != 0) {
            throw new IllegalArgumentException("十六进制字符串长度必须为偶数");
        }

        byte[] bytes = new byte[len / 2];
        for (int i = 0; i < len; i += 2) {
            bytes[i / 2] = (byte) ((Character.digit(hex.charAt(i), 16) << 4)
                    + Character.digit(hex.charAt(i + 1), 16));
        }
        return bytes;
    }

    /**
     * 字节数组转十六进制字符串
     */
    public static String bytes2hex(byte[] bytes) {
        if (bytes == null || bytes.length == 0) {
            return "";
        }
        StringBuilder result = new StringBuilder(bytes.length * 2);
        for (byte b : bytes) {
            result.append(String.format("%02X", b));
        }
        return result.toString();
    }

    public static byte[] convertToBytes(Object object) throws IOException {
        try (ByteArrayOutputStream bos = new ByteArrayOutputStream();
             ObjectOutputStream oos = new ObjectOutputStream(bos)) {
            oos.writeObject(object);
            return bos.toByteArray();
        }
    }

    // 其他工具方法...
}