Java RAW compression and decompression

package com.ahzc.test;import java.io.bufferedinputstream;import java.io.bufferedoutputstream; Import java.io.file;import java.io.fileinputstream;import java.io.filenotfoundexception;import  java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import  java.io.outputstream;import java.util.enumeration;import java.util.zip.zipentry;import  java.util.zip.zipfile;import java.util.zip.zipinputstream;import java.util.zip.zipoutputstream; public class compress {/**   *  function:  zip All files under the  sourceDir  directory   format compression, save as specified  zip  file   *  @param  sourceDir  If it is a directory, eg:d:\\myeclipse\\first\ \testfile, all files under the compressed directory;  *       if it is a file, eg:d:\\myeclipse\\first\\testfile\ \aa.zip, only compress this file   *  @param  zipFile  last compressed file path and name, eg:d:\\myeclipse\\first\\testfile\\ Aa.zip  */ public static file dozip (String sourcedir, string zipfilepath)   throws  Ioexception {    file file = new file (SourceDir);   File  zipfile = new file (Zipfilepath);  zipoutputstream zos = null;   try {   //  Create write-out flow operation    outputstream os = new  fileoutputstream (ZipFile);   bufferedoutputstream bos = new  Bufferedoutputstream (OS);    zos = new zipoutputstream (BOS);       String basePath = null;      //  Get catalog     if (File.isdirectory ())  {    basepath = file.getpath ();    }else {    basepath = file.getparent ();    }      &nbsP;zipfile (File, basepath, zos);   }finally {   if (zos != null )  {    zos.closeentry ();     zos.close ();   }   }    return zipFile; } /**   *  @param  source   Source files   *  @param  basePath   *  @param  zos   */  private static void zipfile (file source, string basepath,  Zipoutputstream zos)   throws IOException {  File[] files =  null;  if  (Source.isdirectory ())  {   files = source.listfiles ();   } else {   files = new file[1];   files[0]  = source;  }    InputStream is = null;   String pathname;  byte[] buf = new byte[1024];  int length = 0;  try{    for (file file : files)  {//compress all the files underneath the folder, knowing Zos.close is the time to compress complete      if (File.isdirectory ())  {     pathname = file.getpath (). substring (basepath.length ()  + 1)  +  "/";      zos.putnextentry ( New zipentry (PathName));      zipfile (File, basepath, zos);     }else {     pathname = file.getpath (). SUBSTRING ( Basepath.length ()  + 1);      is = new fileinputstream (file);      bufferedinputstream bis = new bufferedinputstream (IS);      zos.putnextentry (New zipentry (PathName));      while   (length = bis.reAD (BUF))  > 0)  {      zos.write (buf, 0, length);      }    }   }  }finally {    if (Is != null)  {    is.close ();    }  }  }  /** *  extract to the specified directory  *  @param  zipPath   Zip package directory  *  @param  descDir   generate File Save directory  *  */public static void unzipfiles (String  zippath,string descdir) Throws ioexception{unzipfiles (New file (ZipPath),  descDir);} /** *  extract files to the specified directory  *  @param  zipFile *  @param  descdir *  */ @SuppressWarnings ("Rawtypes") Public static void unzipfiles (file zipfile2,string  Descdir) throws ioexception{ try {         // Create a ZipFile object based on a zip file           zipfile zipfile = new zipfile (ZipFile2);             ZipEntry entry = null;             String entryName = null;             String targetFileName = null;             byte[] buffer = new  byte[1024];            int bytes_read;              //get all the entry   in the zip file           Enumeration entrys =  Zipfile.entries ();             //Traverse all entry             while  (Entrys.hasmoreelements ())  {              entry =  (ZipEntry) entrys.nextelement ();              //gets entry's name               entryname =  entry.getname ();              targetfilename = descdir+file.separator+ entryname;             if  ( Entry.isdirectory ()) {              //    if entry is a directory, create a directory                new file (TargetFileName). Mkdirs ();               continue;             } else {               //  if entry is a file, create a parent directory                new file (TargetFileName). GetParentFile ( ). Mkdirs ();             }              //otherwise create file               file targetfile = new file (TargetFileName);              system.out.println ("Create File:"  +  targetfile.getabsolutepath ());              //Open File output stream              fileoutputstream  os = new fileOutputStream (targetfile);              // Open the entry input stream from the ZipFile object               Inputstream  is = zipfile.getinputstream (Entry);              while  ((bytes_read = is.read (buffer))  != -1) {               os.write (Buffer, 0,  bytes_read);             }              //Close Flow               os.close ( );              is.close ( );             }    &nbsP;       system.out.println ("Unzip the file successfully!") ");        } catch  (Ioexception err)  {             SYSTEM.ERR.PRINTLN ("Uncompressed file failed: "  +  ERR);         }}}

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Java RAW compression and decompression