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 ();
    }
}

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