Implementing Java Code Compression decompression

Source: Internet
Author: User

Cause: A time when you want to modify some files in a zip on the server
Originally thought very simple thing, looked for a lot of code on the net, the result is not very ideal.


Implementing objects: For various types of folders (including sub-files or subfolders)


Here is a description of their own comprehensive online code to write their own

The first thing to pour into a jar package: (0 points download)

Package Com.tzx.test2;import Java.io.File;  Import java.io.FileNotFoundException;  Import java.io.IOException;  Import Org.apache.tools.zip.ZipOutputStream;  Import Java.io.FileInputStream;  Import Java.io.FileOutputStream;  Import Java.io.InputStream;  Import java.util.Enumeration;  Import Org.apache.tools.zip.ZipEntry;   Import Org.apache.tools.zip.ZipFile; /** * Compress unzip zip file * @author stven_king * @date: April 1, 2015 PM 4:09:11 * */public class Ziputil {/** * compressed folder * @param files  Dirth destination File e:/a/b * @param zipfilepath The path name of the compressed file E:/a/b.zip * @param deletefile whether to delete folders and directories * @return Boolean compression succeeded *  */public static Boolean Dozip (String Filesdirpath, String Zipfilepath,boolean deletefile) {return Dozip (new      File (Filesdirpath), zipfilepath,deletefile); } private static Boolean Dozip (File inputfile, String zipfilename,boolean deletefile) {zipoutputstream ou          t = null; try {out = new Zipoutputstream (new FileOutputStream (Zipfilename));            Boolean result = Dozip (out, Inputfile, "");          return result;              } catch (FileNotFoundException ex) {ex.printstacktrace ();          return false;              } catch (IOException ex) {ex.printstacktrace ();          return false;                  } finally {try {out.close ();            if (DeleteFile) {deletedir (inputfile);}                  } catch (IOException ex) {ex.printstacktrace ();              return false;              }}} private static Boolean Dozip (Zipoutputstream out, File F, String Base) {try {                  if (F.isdirectory ()) {file[] fl = F.listfiles ();                if (Fl.length = = 0) {out.putnextentry (new Org.apache.tools.zip.ZipEntry (base + "/")); } for (int i = 0; i < fl.length; i++) {Dozip (out, fl[i], base + "/" + FL[I].getname ());                  }} else {Out.putnextentry (base));                  FileInputStream in = new FileInputStream (f);                  int b;                  while ((b = In.read ())! =-1) {out.write (b);              } in.close ();          } return true;              } catch (IOException ex) {ex.printstacktrace ();          return false; }}/** * Unzip zip file * @param zipfilepath Compressed file path name E:/b/a.zip * @param base unzip file storage path E:/B/C * @param deletefile Whether to delete the compressed package * @return Boolean to extract success * */public static Boolean UnZip (String Zipfilepath, String              Base, Boolean DeleteFile) {try {File file = new file (Zipfilepath);              if (!file.exists ()) {throw new RuntimeException ("Unzip file does not exist!");          } zipfile ZipFile = new ZipFile (file);    Enumeration E = Zipfile.getentries ();                  while (E.hasmoreelements ()) {ZipEntry ZipEntry = (zipentry) e.nextelement ();                      if (Zipentry.isdirectory ()) {String name = Zipentry.getname ();                      Name = name.substring (0, Name.length ()-1);                      File F = new file (base+ "/" + name);                  F.mkdirs ();                      } else {file F = new File (base + zipentry.getname ());                      F.getparentfile (). Mkdirs ();                      F.createnewfile ();                      InputStream is = Zipfile.getinputstream (zipentry);                      FileOutputStream fos = new FileOutputStream (f);                      int length = 0;                      Byte[] B = new byte[1024];                      while (length = Is.read (b, 0, 1024x768))! =-1) {fos.write (b, 0, length);          } is.close ();            Fos.close ();              }} if (ZipFile! = null) {zipfile.close ();            } if (DeleteFile) {file.deleteonexit ();          } return true;          } catch (IOException ex) {return false;  }}/** * Recursively delete all files and subdirectories under directory * @param dir file directory to be deleted * @return Boolean */private static            Boolean Deletedir (File dir) {if (Dir.isdirectory ()) {string[] children = dir.list ();//recursively delete subdirectories in directory for (int i=0; i<children.length; i++) {Boolean success = Deletedir (New File (dir, children[i]))                ;                if (!success) {return false;    }}}//directory is empty at this time, you can delete return Dir.delete ();   }}



Implementing Java Code Compression decompression

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