Java Simulation PHP Pack and unpack class _php tips

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Package qghl.intp.util;
Import java.io.IOException;
 
Import Java.io.InputStream;
    public class packutil{/** * Package String * Similar to PHP in Java implementation of the pack * * @param str * @return
      public static byte[] Pack (String str) {int nibbleshift = 4;
      int position = 0;
      int len = Str.length ()/2 + str.length ()% 2;
      byte[] output = new Byte[len];
        for (char V:str.tochararray ()) {Byte n = (byte) v;
        if (n >= ' 0 ' && n <= ' 9 ') {n = ' 0 ');
        else if (n >= ' a ' && n <= ' F ') {n-= (' A '-10);
        else if (n >= ' a ' && n <= ' f ') {n-= (' A '-10);
        else {continue;
 
        } Output[position] |= (n << nibbleshift);
        if (Nibbleshift = = 0) {position++;
      } Nibbleshift = (Nibbleshift + 4) & 7;
    return output;
    /** * 16 character Decompression class PHP unpack * * @param is * @param len * @return * @throws ioexception/public static String unpack (inputstre
      AM is, int len) throws IOException {byte[] bytes = new Byte[len];
      Is.read (bytes);
    Return unpack (bytes); /*** * 16 character Decompression class php unpack * @param bytes * * @return/public static String unpack (byte[
      ] {StringBuilder StringBuilder = new StringBuilder ("") bytes);
      if (bytes = NULL | | bytes.length <= 0) {return null;
        for (int i = 0; i < bytes.length i++) {int v = bytes[i] & 0xFF;
        String HV = integer.tohexstring (v);
        if (Hv.length () < 2) {stringbuilder.append (0);
      } stringbuilder.append (HV);
    return stringbuilder.tostring ();

 }
  }

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