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| package com.ruoyi.common.utils.netty;
|
| public class HexUtils {
|
| private static final char[] HEXES = {
| '0', '1', '2', '3',
| '4', '5', '6', '7',
| '8', '9', 'A', 'B',
| 'C', 'D', 'E', 'F'
| };
|
| /**
| * byte数组 转换成 16进制小写字符串
| */
| public static String bytes2Hex(byte[] bytes) {
| if (bytes == null || bytes.length == 0) {
| return null;
| }
|
| StringBuilder hex = new StringBuilder();
|
| for (byte b : bytes) {
| hex.append(HEXES[(b >> 4) & 0x0F]);
| hex.append(HEXES[b & 0x0F]);
| }
|
| return hex.toString();
| }
|
| /**
| * 16进制字符串 转换为对应的 byte数组
| */
| public static byte[] hex2Bytes(String hex) {
| if (hex == null || hex.length() == 0) {
| return null;
| }
|
| char[] hexChars = hex.toCharArray();
| // 如果 hex 中的字符不是偶数个, 则忽略最后一个
| byte[] bytes = new byte[hexChars.length / 2];
|
| for (int i = 0; i < bytes.length; i++) {
| bytes[i] = (byte) Integer.parseInt("" + hexChars[i * 2] + hexChars[i * 2 + 1], 16);
| }
|
| return bytes;
| }
|
| }
|
|
