java等效于php“fnum”解包函数，将十六进制转换为java中的浮点IEEE 754

Question

我在 PHP 中有这个功能：

function hex2float($strHex) {

   $array = unpack("fnum", pack("H*", $strHex));

   return $array['num'];

}

我怎么能用java写呢？

Answer 1

我想以这种方式转换此功能：private Float hex2float(String hexStr) {&nbsp; &nbsp; Float result = null;&nbsp; &nbsp; try {&nbsp; &nbsp; &nbsp; &nbsp; byte[] decodes = Hex.decodeHex(hexStr.toCharArray());&nbsp; &nbsp; &nbsp; &nbsp; result = getFloat(decodes, 0);&nbsp; &nbsp; } catch (DecoderException e) {&nbsp; &nbsp; &nbsp; &nbsp; // log error&nbsp; &nbsp; }&nbsp; &nbsp; return result;}private float getFloat(byte[] b, int index) {&nbsp; &nbsp; int l;&nbsp; &nbsp; l = b[index + 0];&nbsp; &nbsp; l &= 0xff;&nbsp; &nbsp; l |= ((long) b[index + 1] << 8);&nbsp; &nbsp; l &= 0xffff;&nbsp; &nbsp; l |= ((long) b[index + 2] << 16);&nbsp; &nbsp; l &= 0xffffff;&nbsp; &nbsp; l |= ((long) b[index + 3] << 24);&nbsp; &nbsp; return Float.intBitsToFloat(l);}