In last section, you learn about how to write or serialized an object into a file. In this example , you can do more than just serialized it , you also can compress the serialized object to reduce the file size.

The idea is very simple, just using the “GZIPOutputStream” for the data compression.

FileOutputStream fos = new FileOutputStream("c:\\address.gz");
GZIPOutputStream gz = new GZIPOutputStream(fos);
ObjectOutputStream oos = new ObjectOutputStream(gz);

GZIP Example

In this example, you will create an “Address” object , compress it and write it into a file “c:\\address.gz“.

P.S Address object can refer to this article.

package com.mkyong.io;
 
import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.zip.GZIPOutputStream;
 
public class Serializer implements Serializable{
 
   public static void main (String args[]) {
 
	   Serializer serializer = new Serializer();
	   serializer.serializeAddress("wall street", "united state");
   }
 
   public void serializeAddress(String street, String country){
 
	   Address address = new Address();
	   address.setStreet(street);
	   address.setCountry(country);
 
	   try{
 
		   FileOutputStream fos = new FileOutputStream("c:\\address.gz");
		   GZIPOutputStream gz = new GZIPOutputStream(fos);
 
		   ObjectOutputStream oos = new ObjectOutputStream(gz);
 
		   oos.writeObject(address);
		   oos.close();
 
		   System.out.println("Done");
 
	   }catch(Exception ex){
		   ex.printStackTrace();
	   }	 
   }
}
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