Java hex hexadecimal byte String Conversion class

For work needs, we sorted out a hexadecimal byte string value conversion class.

If you need it, you can use it directly.

Package MoBi. DZS. util; /*** conversion between hexadecimal value and string/byte * @ author jerryli * @ email lijian@dzs.mobi * @ data 2011-10-16 **/public class chexconver {/*** String Conversion hexadecimal string * @ Param string str ascii string to be converted * @ return string each byte is separated by a space, for example: [61 6C 6B] */public static string str2hexstr (string Str) {char [] chars = "0123456789 abcdef ". tochararray (); stringbuilder sb = new stringbuilder (""); byte [] BS = Str. getbyte S (); 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 ();}/*** hexadecimal conversion string * @ Param string STR byte string (no separator between byte, for example, [616c6b]) * @ return string */public static string hexstr2str (string hexstr) {string STR = "0123456789 abcdef"; char [] hexs = hexstr. tocharar Ray (); 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 );} /*** convert bytes to a hexadecimal string * @ Param byte [] B byte array * @ return string separate each byte value by Space */public static string byte2hexstr (byte [] b) {string stmp = ""; stringbuilder sb = new stri Ngbuilder (""); 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 ();}/*** bytes string to byte value * @ Param string SRC byte string, no separator * @ return byte [] */public static byte [] hexstr2bytes (string SRC) {int m = 0, n = 0; int L = SRC. length ()/2; system. out. println (l); byte [] ret = new byte [l]; for (INT I = 0; I <L; I ++) {M = I * 2 + 1; N = m + 1; RET [I] = byte. decode ("0x" + SRC. substring (I * 2, m) + SRC. substring (m, n);} return ret ;} /*** convert string to Unicode string * @ Param string strtext full-width string * @ return string no separator between each Unicode * @ throws exception */public static string strtounicode (string strtext) throws exception {char C; stringbuilder STR = new stringbuilder (); int intasc; string strhex; For (INT I = 0; I <strtext. length (); I ++) {c = strtext. charat (I); intasc = (INT) C; strhex = integer. tohexstring (intasc); If (intasc> 128) Str. append ("\ U" + strhex); else // Add 00 STR in front of the low position. append ("\ u00" + strhex);} return Str. tostring ();}/*** convert Unicode strings to string strings * @ Param string hex hexadecimal value string (a Unicode is 2 bytes) * @ return string full-width string */public static string unicodetostring (string HEX) {int T = hex. length ()/6; stringbuilder STR = new stringbuilder (); For (INT I = 0; I <t; I ++) {string S = hex. substring (I * 6, (I + 1) * 6); // you need to add 00 to the high position and then convert it to string S1 = S. substring (2, 4) + "00"; // string S2 = S. substring (4); // convert string in hexadecimal format to int n = integer. valueof (S1, 16) + integer. valueof (S2, 16); // convert int to Char [] chars = character. tochars (n); Str. append (new string (chars);} return Str. tostring ();}}