原文出自:http://blog.csdn.net/qq387732471/article/details/7360988
void ByteToHexStr(const unsigned char* source, char* dest, int sourceLen) { short i; unsigned char highByte, lowByte; for (i = 0; i < sourceLen; i++) { highByte = source[i] >> 4; lowByte = source[i] & 0x0f ; highByte += 0x30; if (highByte > 0x39) dest[i * 2] = highByte + 0x07; else dest[i * 2] = highByte; lowByte += 0x30; if (lowByte > 0x39) dest[i * 2 + 1] = lowByte + 0x07; else dest[i * 2 + 1] = lowByte; } return ; } //字节流转换为十六进制字符串的另一种实现方式 void Hex2Str( const char *sSrc, char *sDest, int nSrcLen ) { int i; char szTmp[3]; for( i = 0; i < nSrcLen; i++ ) { sprintf( szTmp, "%02X", (unsigned char) sSrc[i] ); memcpy( &sDest[i * 2], szTmp, 2 ); } return ; } //十六进制字符串转换为字节流 void HexStrToByte(const char* source, unsigned char* dest, int sourceLen) { short i; unsigned char highByte, lowByte; for (i = 0; i < sourceLen; i += 2) { highByte = toupper(source[i]); lowByte = toupper(source[i + 1]); if (highByte > 0x39) highByte -= 0x37; else highByte -= 0x30; if (lowByte > 0x39) lowByte -= 0x37; else lowByte -= 0x30; dest[i / 2] = (highByte << 4) | lowByte; } return ; }