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public class AppZip
{
    List<String> fileList;
    private static final String OUTPUT_ZIP_FILE = "C:\\MyFile.zip";
    private static final String SOURCE_FOLDER = "C:\\testzip";

    AppZip(){
	fileList = new ArrayList<String>();
    }

    public static void main( String[] args )
    {
    	AppZip appZip = new AppZip();
    	appZip.generateFileList(new File(SOURCE_FOLDER));
    	appZip.zipIt(OUTPUT_ZIP_FILE);
    }

    /**
     * Zip it
     * @param zipFile output ZIP file location
     */
    public void zipIt(String zipFile){

     byte[] buffer = new byte[1024];

     try{

    	FileOutputStream fos = new FileOutputStream(zipFile);
    	ZipOutputStream zos = new ZipOutputStream(fos);

    	System.out.println("Output to Zip : " + zipFile);

    	for(String file : this.fileList){

    		System.out.println("File Added : " + file);
    		ZipEntry ze= new ZipEntry(file);
        	zos.putNextEntry(ze);

        	FileInputStream in =
                       new FileInputStream(SOURCE_FOLDER + File.separator + file);

        	int len;
        	while ((len = in.read(buffer)) > 0) {
        		zos.write(buffer, 0, len);
        	}

        	in.close();
    	}

    	zos.closeEntry();
    	//remember close it
    	zos.close();

    	System.out.println("Done");
    }catch(IOException ex){
       ex.printStackTrace();
    }
   }

    /**
     * Traverse a directory and get all files,
     * and add the file into fileList
     * @param node file or directory
     */
    public void generateFileList(File node){

    	//add file only
	if(node.isFile()){
		fileList.add(generateZipEntry(node.getAbsoluteFile().toString()));
	}

	if(node.isDirectory()){
		String[] subNote = node.list();
		for(String filename : subNote){
			generateFileList(new File(node, filename));
		}
	}

    }

    /**
     * Format the file path for zip
     * @param file file path
     * @return Formatted file path
     */
    private String generateZipEntry(String file){
    	return file.substring(SOURCE_FOLDER.length()+1, file.length());
    }
}