Java Simulation PHP Pack and unpack class _php tips

Source: Internet
Author: User
Tags pack unpack

This article for you to share the Java simulation of PHP pack and unpack class of specific code for your reference, the specific content as follows

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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