Creating a ZIP file in Java

This section teaches you about the ZIP file with java program.

Creating a ZIP file in Java

This section teaches you about the ZIP file with java program.

Creating a ZIP file in Java

Creating a ZIP file in Java

     

Zip File: Zip file format is the popular method of data compression. Zip file contains many files in compressed format. You can say the files are stored in the zip format with compression. The file which is in the zip format holds the ".zip" extension.

You can make executable file in zip format. You can archive data from the zip file by extracting it. For create a zip file from other type of file, following program gives you the best way of making it possible through you code in java application.

Program Result:

This program makes a zip file from only one file which is given by you. It takes a file to make it into zip format and it takes the zip file name which has to be created from the given file. Finally, it makes the zip file. You can archive the file from the zip file by extracting, if you want.

Code Description:

Several methods and APIs are used in the following program for making a zip file from the given file. These are explained as follows:

ZipOutputStream:
ZipOutputStream is the class of java.util.zip.*; package. This class is used to compression the file whether the file is compressed on uncompressed.

ZipOutputStream.setLevel(Deflater.DEFAULT_COMPRESSION):
Above mentioned is the setLevel() method of ZipOutputStream class which sets the level of the compression process. This method takes a argument which is the built-in field of the Deflater class.

Deflater:
This is the class of java.util.zip.*; package. This class provides the compression using the ZLIB compression library.

Here is the code of the program:

import java.io.*;
import java.util.zip.*;

public class ZipCreateExample{
  public static void main(String[] args) throws IOException{
  System.out.print("Please enter file name to zip : ");
  BufferedReader input = new BufferedReader
(new InputStreamReader(System.in));
  String filesToZip = input.readLine();
  File f = new File(filesToZip);
  if(!f.exists()){
  System.out.println("File not found.");
  System.exit(0);
  }
  System.out.print("Please enter zip file name : ");
  String zipFileName = input.readLine();
  if (!zipFileName.endsWith(".zip"))
  zipFileName = zipFileName + ".zip";
  byte[] buffer = new byte[18024];
  try{
  ZipOutputStream out = new ZipOutputStream
(new FileOutputStream(zipFileName));
  out.setLevel(Deflater.DEFAULT_COMPRESSION);
  FileInputStream in = new FileInputStream(filesToZip);
  out.putNextEntry(new ZipEntry(filesToZip));
  int len;
  while ((len = in.read(buffer)) > 0){
  out.write(buffer, 0, len);
  }
  out.closeEntry();
  in.close();
  out.close();
  }
  catch (IllegalArgumentException iae){
  iae.printStackTrace();
  System.exit(0);
  }
  catch (FileNotFoundException fnfe){
  fnfe.printStackTrace();
  System.exit(0);
  }
  catch (IOException ioe){
  ioe.printStackTrace();
  System.exit(0);
  }
  }
}

Download this example.

Tutorials

  1. Java util package Examples
  2. Java Util Package - Utility Package of Java
  3. Generating Random Number
  4. Breaking the String into Words
  5. Listing all available Locales
  6. Setting the default Locale
  7. Associate a value with an object
  8. Comparing Arrays
  9. Shuffling the Element of a List or Array
  10. Collections Framework
  11. Collection Iterate Example
  12. Converting Collection to an Array
  13. Converting an Array to a Collection
  14. Implement the Queue in Java
  15. Implementing a Stack in Java
  16. Implementing a Least-Recently-Used(LRU) Cache
  17. Creating a Copy of a Collection
  18. Making a Collection Read-Only
  19. Sorting elements of a Collection
  20. Creating a Hash Table
  21. Finding an Element in a Sorted Array
  22. Read the Key-Value of Property File in Java
  23. Get All Keys and Values of the Properties files in Java
  24. Write the Keys and Values of the Properties files in Java
  25. Scheduling a Timer Task
  26. Getting the Current Time
  27. Getting Information of All Available Time Zones
  28. Getting the current date
  29. Determining the Number of Days in a Month
  30. Comparing Dates in Java
  31. Determining the actual age from date of birth in Java
  32. Determining If a Year is a Leap Year in Java
  33. Determining the Day-of-Week for a Particular Date
  34. What is a JAR file in Java
  35. Creating a JAR file in Java
  36. Viewing contents of a JAR File
  37. Listing the Main Attributes in a JAR File Manifest
  38. Creating a ZIP file in Java
  39. Listing Contents of a ZIP File
  40. Unzip a ZIP File