十六进制字符串与字节数组转换工具

最新推荐文章于 2025-01-21 09:36:24 发布

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最新推荐文章于 2025-01-21 09:36:24 发布

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分类专栏：笔记文章标签： java

原文链接：https://blog.youkuaiyun.com/wahaha13168/article/details/82903898

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1.十六进制字符串转字节数组

public static byte[] hexToBytes(String hex) {
        hex = hex.length() % 2 != 0 ? "0" + hex : hex;

        byte[] b = new byte[hex.length() / 2];
        for (int i = 0; i < b.length; i++) {
            int index = i * 2;
            int v = Integer.parseInt(hex.substring(index, index + 2), 16);
            b[i] = (byte) v;
        }
        return b;
    }

2.字节数组转十六进制字符串

static char[] hexArray={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};

    public static String bytesToHex(byte[] bytes) {
        char[] hexChars = new char[bytes.length * 2];

        for (int j = 0; j < bytes.length; j++) {
            int v = bytes[j] & 0xFF;
            hexChars[j * 2] = hexArray[v >>> 4];
            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
        }
        return new String(hexChars);
    }