Create Zip File From Directory using ZipOutputStream Example

/*
	Create Zip File From Directory using ZipOutputStream Example
	This Java example shows how create zip file from directory
	using Java ZipOutputStream class.
*/
 
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipOutputStream;
 
 
public class CreateZipFileDirectory {
 
	public static void main(String args[])
	{		 
		try
		{
			String zipFile = "C:/FileIO/zipdemo.zip";
			String sourceDirectory = "C:/examples";
 
			//create byte buffer
			byte[] buffer = new byte[1024];
			/*
			 * To create a zip file, use
			 * 
			 * ZipOutputStream(OutputStream out)
			 * constructor of ZipOutputStream class.
			 *  
			 */
 
			 //create object of FileOutputStream
			 FileOutputStream fout = new FileOutputStream(zipFile);
 
			 //create object of ZipOutputStream from FileOutputStream
			 ZipOutputStream zout = new ZipOutputStream(fout);
 
			 //create File object from directory name
			 File dir = new File(sourceDirectory);
 
			 //check to see if this directory exists
			 if(!dir.isDirectory())
			 {
			 	System.out.println(sourceDirectory + " is not a directory");
			 }
			 else
			 {
			 	File[] files = dir.listFiles();
 
			 	for(int i=0; i < files.length ; i++)
			 	{
			 		System.out.println("Adding " + files[i].getName());
 
					//create object of FileInputStream for source file
					FileInputStream fin = new FileInputStream(files[i]);
 
					/*
					 * To begin writing ZipEntry in the zip file, use
					 * 
					 * void putNextEntry(ZipEntry entry)
					 * method of ZipOutputStream class.
					 * 
					 * This method begins writing a new Zip entry to 
					 * the zip file and positions the stream to the start 
					 * of the entry data.
					 */
 
					zout.putNextEntry(new ZipEntry(files[i].getName()));
 
					/*
					 * After creating entry in the zip file, actually 
					 * write the file.
					 */
					int length;
 
					while((length = fin.read(buffer)) > 0)
					{
					   zout.write(buffer, 0, length);
					}
 
					/*
					 * After writing the file to ZipOutputStream, use
					 * 
					 * void closeEntry() method of ZipOutputStream class to 
					 * close the current entry and position the stream to 
					 * write the next entry.
					 */
 
					 zout.closeEntry();
 
					 //close the InputStream
					 fin.close();
			 	}
			 }
 
			  //close the ZipOutputStream
			  zout.close();
 
			  System.out.println("Zip file has been created!");
 
		}
		catch(IOException ioe)
		{
			System.out.println("IOException :" + ioe);
		}
 
	}
}
 
/*
Output of this program would be
Adding nonav.log
Adding ospreg.exe
Adding servers.ini
Adding setupisam.log
Adding sourceFile1.doc
Adding sourceFile2.doc
Zip file has been created!
*/