Java file operations zip compressed file read and write operations

This article describes three examples of using java to read and write zip compressed files. The example is as follows.

Create a zip compressed file

Import java. io. fileinputstream;
Import java. io. fileoutputstream;
Import java.util.zip.zip entry;
Import java.util.zip.zip outputstream;

Public class main {
Public static void main (string [] args) throws exception {
Fileinputstream instream = new fileinputstream ("test.txt ");
Zipoutputstream outstream = new zipoutputstream (new fileoutputstream ("compressed.zip "));

Outstream. putnextentry (new zipentry ("test.txt "));

Byte [] buffer = new byte [1024];
Int bytesread;

While (bytesread = instream. read (buffer)> 0 ){
Outstream. write (buffer, 0, bytesread );
    }

Outstream. closeentry ();
Outstream. close ();
Instream. close ();
  }

}

Decompress the zip file

Import java. io. fileinputstream;
Import java.util.zip.zip entry;
Import java.util.zip.zip inputstream;

Public class main {

Public static void main (string [] args) throws exception {
Fileinputstream FCM = new fileinputstream ("c:/myzip.zip ");
Zipinputstream zis = new zipinputstream (FCM );
Zipentry ze;
While (ze = zis. getnextentry ())! = Null ){
System. out. println (ze. getname ());
Zis. closeentry ();
    }

Zis. close ();

  }
}

Write a zip file

Import java. io. fileoutputstream;
Import java.util.zip.zip entry;
Import java.util.zip.zip outputstream;

Public class main {
Public static void main (string [] args) throws exception {
Fileoutputstream fos = new fileoutputstream ("c:/myzip.zip ");
Zipoutputstream zos = new zipoutputstream (fos );
Zipentry ze = new zipentry ("c:/file1.txt ");
Zos. putnextentry (ze );
Zos. closeentry ();
Ze = new zipentry ("c:/file2.txt ");
Zos. putnextentry (ze );
Zos. closeentry ();
Zos. close ();
  }
}