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 Java > Zip Utilities > GZip File Compression

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  :  kvenkatasudhakar@gmail.com
   
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();
      }
  }
}
   

It gives the following output,
File successfully compressed : C:\prop_file.txt.gzip


                    Print

   



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