Max's Blog

n年前的课题了，今天要用，都忘记了，记录一下

byte to hex 直接java方法：

// convert a single byte b to a 2-char hex string

// with possible leading zero.

String s2 = Integer.toString( ( b & 0xff ) + 0x100, 16 /* radix */ )

		.substring( 1 );

字典法和反向转换，记录自己在无线时候写的一个：

        /*
         *取得byte的16进制字符串
        */     
        private static final String HexString = “0123456789ABCDEF”;
       

        public static String getHexString(byte [] msg_byte)
        {
                StringBuffer sb = new StringBuffer(msg_byte.length * 2);
                for(int i =0;i<msg_byte.length;i++)
                {
                        sb.append(HexString.charAt(0xf&msg_byte[i]>>4)).append(HexString.charAt(msg_byte[i]&0xf));
                }
                return sb.toString();
        }      
               
        public static byte[] getBytesFromHexStr(String s)
        {              
                try    
                {              
                        int i = s.length();
                        byte result[] = new byte[i >> 1];
                        for(int k = 0; k < i;)
                                result[k >> 1] = (byte)(Integer.parseInt(s.substring(k,k+=2),16));
                        return result;
                }
                catch(Exception ex)
                {
                        //ex.printStackTrace();
                        return null;
                }
        }