拿java写的类改的 可用于Unity

using System.Collections;

using System;

using System.Linq;

using System.Collections;

using System.Collections.Generic;

using System.Text;

using System.Threading;

/*

 * 字符转换工具类

 * By StanWind

 */

public class NumberUtils{

    //字节集到十六进制文本

    public static String byteToHexString(byte[] bytes) {

        StringBuilder stringBuilder = new StringBuilder(32);

        //Debug.Log ("L---->" + bytes.Length);

        for (int i = 0; i < bytes.Length; i++) {



            int v = bytes[i] & 0xFF;

            //String hv = Integer.toHexString(v).toUpperCase();

            //C#写法

            string hv = v.ToString ("X2").ToUpper();



            if (hv.Length < 2) {

                stringBuilder.Append(0);

            }

            stringBuilder.Append(hv+" ");

        }

        return stringBuilder.ToString();

    }

    //字节集到十六进制文本 带长度

    public static String byteToHexStringWithLength(byte[] bytes) {

        StringBuilder stringBuilder = new StringBuilder(32);

        //Debug.Log ("L---->" + bytes.Length);

        int l = bytes.Length & 0xFF;

        string hv = l.ToString ("X2").ToUpper();



        if (hv.Length < 2) {

            stringBuilder.Append(0);

        }

        stringBuilder.Append(hv+" ");



        for (int i = 0; i < bytes.Length; i++) {



            int v = bytes[i] & 0xFF;

            //String hv = Integer.toHexString(v).toUpperCase();

            //C#写法

            hv = v.ToString ("X2").ToUpper();



            if (hv.Length < 2) {

                stringBuilder.Append(0);

            }

            stringBuilder.Append(hv+" ");

        }

        return stringBuilder.ToString();

    }



    //十六进制文本到字节集

    public static byte[] hexStringToBytes(String hexString) {

        if (hexString == null || "".Equals(hexString)) {

            return null;

        }

        // 去除空格、制表符、换行、回车

        hexString = hexString.Replace("\\s*|\t|\r|\n", "").ToUpper();

        hexString = hexString.Replace(" ", "");



        int length = hexString.Length / 2;

        char[] hexChars = hexString.ToCharArray();

        byte[] bytes = new byte[length];

        for (int i = 0; i < length; i++) {

            int pos = i * 2;

            byte t = (byte)(charToByte (hexChars [pos]) << 4 | charToByte (hexChars [pos + 1]));

            bytes[i] = t;

            //print(t);

        }

        return bytes;

    }



    public static int hexToInt(string data){

        string r = data.Replace (" ", "");

        return Convert.ToInt32 (r, 16);

    }



    public static byte[] stringToBytes(string input){

        //System.Text.Encoding gbkEncode = System.Text.Encoding.GetEncoding("gb2312");

        return Encoding.GetEncoding("gb2312").GetBytes(input);

    }

    public static string bytesToString(byte[] b){

        return Encoding.GetEncoding("gb2312").GetString (b);

    }



    public static byte charToByte(char i) {

        return (byte) "0123456789ABCDEF".IndexOf(i);

    }



    public static string read(string data,int start,int length){

        string rtn = data.Replace(" ","");



        rtn = rtn.Substring (start * 2, length * 2);

        //Debug.Log (rtn);

        rtn = appendSpace (rtn);

        return rtn;

    }



    public static string appendSpace(string data){

        StringBuilder sb = new StringBuilder ();

        for (int i = 1; i < (data.Length / 2); i++) {

            sb.Append(data.Substring(i*2-2,2));

            sb.Append (" ");

        }

        sb.Append (data.Substring (data.Length - 2, 2));



        return sb.ToString ();

    }

}