/**

* 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

{

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

{

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