/**  
     * 字串轉換成十六進位制字串 
     * @param String str 待轉換的ASCII字串 
     * @return String 每個Byte之間空格分隔，如: [61 6C 6B] 
     */    
    public static String str2HexStr(String str)  
    {    
  
        char[] chars = "0123456789ABCDEF".toCharArray();    
        StringBuilder sb = new StringBuilder("");  
        
 
byte[] bs = str.getBytes();    
        int bit;    
          
        for (int i = 0; i < bs.length; i++)  
        {    
            bit = (bs[i] & 0x0f0) >> 4;    
            sb.append(chars[bit]);    
            bit = bs[i] & 0x0f;    
            sb.append(chars[bit]);  
            sb.append(
 
' ');  
        }    
        return sb.toString().trim();    
    }  
      
    /**  
     * 十六進位制轉換字串 
     * @param String str Byte字串(Byte之間無分隔符 如:[616C6B]) 
     * @return String 對應的字串 
     */    
    public static String hexStr2Str(String hexStr)  
    {    
        String str = "0123456789ABCDEF
 
";    
        char[] hexs = hexStr.toCharArray();    
        byte[] bytes = new byte[hexStr.length() / 2];    
        int n;    
  
        for (int i = 0; i < bytes.length; i++)  
        {    
            n = str.indexOf(hexs[2 * i]) * 16;    
            n += str.indexOf(hexs[2 * i + 1]);    
            bytes[i] = (byte) (n & 0xff);    
        }    
        return new String(bytes);    
    }  
      
    /** 
     * bytes轉換成十六進位制字串 
     * @param byte[] b byte陣列 
     * @return String 每個Byte值之間空格分隔 
     */  
    public static String byte2HexStr(byte[] b)  
    {  
        String stmp="";  
        StringBuilder sb = new StringBuilder("");  
        for (int n=0;n<b.length;n++)  
        {  
            stmp = Integer.toHexString(b[n] & 0xFF);  
            sb.append((stmp.length()==1)? "0"+stmp : stmp);  
            sb.append(" ");  
        }  
        return sb.toString().toUpperCase().trim();  
    }  
     
    /** 
     * 十進位制轉化為十六進位制
     */  
    public static String toHexStr(int data)  
    {  
        return Integer.toHexString(data);
    }

    /** 
     * 十六進位制轉化為十進位制
     */ 

        public static int toParseInt(String data)
    { 
        return Integer.parseInt(data,16);
    }