Java Analog PHP Pack and unpack class unpack download Unpretty Rapstar struct.unpack

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Package qghl.intp.util; Import Java.io.ioexception;import Java.io.InputStream;  public class packutil{/** * Package String * Similar to the implementation of pack in PHP in Java * * @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 binary character decompression class PHP unpack * * @param is * @param len * @return   * @throws IOException */public static String unpack (InputStream is, int len) throws IOException {byte[] b      Ytes = new Byte[len];      Is.read (bytes);    Return unpack (bytes); }/*** * 16 binary character decompression class php unpack * @param bytes * @return * * public static String unpack (byte[] bytes      {StringBuilder StringBuilder = new StringBuilder ("");      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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