Conversion of string byte hexstring in Java

Original: http://blog.sina.com.cn/s/blog_62e9ec530101ebv6.html

Hexstring-->byte

  Public Static byte[] hexstringtobytes (String hexstring) {if(HexString = =NULL|| Hexstring.equals ("")) {            return NULL; } hexstring=hexstring.touppercase (); intLength = Hexstring.length ()/2; Char[] Hexchars =Hexstring.tochararray (); byte[] D =New byte[length];  for(inti = 0; i < length; i++) {            intpos = i * 2; D[i]= (byte) (Chartobyte (Hexchars[pos]) << 4 | chartobyte (Hexchars[pos + 1])); }        returnD; }    Private Static byteChartobyte (Charc) {return(byte) "0123456789ABCDEF". IndexOf (c); }

byte-->string

  Public StaticString bytestohexstring (byte[] src) {StringBuilder StringBuilder=NewStringBuilder (""); if(src = =NULL|| Src.length <= 0) {            return NULL; }         for(inti = 0; i < src.length; i++) {            intv = src[i] & 0xFF; String HV=integer.tohexstring (v); if(Hv.length () < 2) {stringbuilder.append (0);        } stringbuilder.append (HV); }        returnstringbuilder.tostring (); }

byte-->hexstring

 Public   byte = "";    for (int i = 0; i < b.length; i++) {     = integer.tohexstring (b[i] & 0xFF);      if (hex.length () = = 1)       {= ' 0 ' + hex;     }        = a +hex  ;        } return A;}

Conversion of string byte hexstring in Java