Unable to zip the image file properly

[Arun chandu]

Hello,

I'm trying to create a zip file through the Servlet. Actually i'm created zip file but when ever i'm try to open the zip file, data is not proper for image or audio file.
Here the code in servlet:

		File fileName=chooser.getSelectedFile();
		String name=fileName.getAbsolutePath();
		App zip=new  App();
		try {
			statu = zip.compression(name);// name is the file path
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

Calling the class file from the servlet and here class code:

       byte[] buffer = new byte[1024];
    	FileOutputStream fos = new FileOutputStream("D://zip//MyApp.zip");
        System.out.println("1");
	ZipOutputStream zos = new ZipOutputStream(fos);
    	System.out.println(fileName+"  filename");
    	try{
    		File file =new File(fileName);
    		FileInputStream in = new FileInputStream(fileName);
    		zos.putNextEntry(new ZipEntry(file.getName()));
    		int len;
    		while ((len = in.read(buffer)) > 0) {
    			zos.write(buffer, 0, len);
    		}
           zos.flush();
    	    zos.close();
 
    		System.out.println("Done");
 
    	}catch(IOException ex){
    	   ex.printStackTrace();
    	   return false;
    	}
    	return true;

This is working for text file but not for other file and I'm attached image file how it looks after zipped. I search in net and even in coderanch.com but i didn't get it.
Some one help me..
Thanks in advance

[William Brogden]

1. Exactly how are you opening the zipped file?
2. Note that the JPG format is heavily optimized for image data already. Zipping is not likely to significantly reduce the size.
In my own file system I found a jpg size 187KB, when zipped 174KB. The real use of zipping is creating a single download from multiple inputs.

Bill

[Arun chandu]

Hi William,

Thanks for responding.

I'm extracting the zip file i got from the program as output

but most of the files i see in blurred form or i cant even open the files(for example music files).
I tried zipping images which has less pixel size but the output is same.