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

// edit the below file name parameter to specify name of file that shall be created inside compressed zip file
String fileName = "abc.txt";

OutputStream os = null;
ZipOutputStream out = null;
try {
	os = service.getOutputStream();
	out = new ZipOutputStream(new BufferedOutputStream(os));
	byte[] b = new byte[4096];
	int i = 0;
	ZipEntry entry = new ZipEntry(fileName);
	out.putNextEntry(entry);
	while((i = inputStream.read(b))!= -1) {
		out.write( b, 0, i );
	}
	out.closeEntry();
	out.flush();
	out.finish();
} catch (Exception e) {
	service.getLogger().error("Error while compressing the file :: " + e.getMessage(), e);
	throw e;
} finally {
	try {
		if (out != null) {
			out.close();
		}
	} catch (Exception e) {
		//ignore
	}
	try {
		if (os != null) {
			os.close();
		}
	} catch (Exception e) {
		//ignore
	}
}