BE THE CODER > Java > Zip Utilities > GZip File Compression

The following example shows how to compress user given file using GZip compression. To create a GZip compression file we need to copy bytes from source file stream to GZIP output stream.

File Name :	com/bethecoder/tutorials/utils/zip/GZipFileCompression.java
Author :	Sudhakar KV
Email :	[email protected]


package com.bethecoder.tutorials.utils.zip;



import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.zip.GZIPOutputStream;



public class GZipFileCompression {



  /**

   * @param args

   */

  public static void main(String[] args) {



    String srcFilePath = "C:\\prop_file.txt"; 

    String tgtZipFilePath = "C:\\prop_file.txt.gzip";

    

    //gzipCompressFile(srcFilePath, tgtZipFilePath);

    gzipCompressFile(srcFilePath);

  }



  

  public static void gzipCompressFile(String srcFilePath) {

    gzipCompressFile(srcFilePath, srcFilePath + ".gzip");

  }

  

  public static void gzipCompressFile(String srcFilePath, String tgtZipFilePath) {

    try {

          //Open source stream

          FileInputStream inStream = new FileInputStream(srcFilePath);

          

          //Open GZIP output stream

          GZIPOutputStream outStream = new GZIPOutputStream(new FileOutputStream(tgtZipFilePath));

      

          //Copy bytes from source stream to target stream

          byte [] buf = new byte[2048];

          int len;

          

          while ((len = inStream.read(buf)) > 0) {

            outStream.write(buf, 0, len);

          }



          //Close all streams

          inStream.close();

          outStream.close();

          

          System.out.println("File successfully compressed : " + tgtZipFilePath);

          

      } catch (IOException e) {

        e.printStackTrace();

      }

  }

}