Here you can find the source of zipFiles(Collection
public static void zipFiles(Collection<File> resFileList, File zipFile) throws IOException
//package com.java2s; import java.io.*; import java.util.Collection; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; public class Main { private static final int BUFF_SIZE = 1024 * 1024; public static void zipFiles(Collection<File> resFileList, File zipFile) throws IOException { ZipOutputStream zipout = new ZipOutputStream( new BufferedOutputStream(new FileOutputStream(zipFile), BUFF_SIZE));/*from ww w . j ava 2 s . c om*/ for (File resFile : resFileList) { zipFile(resFile, zipout, ""); } zipout.close(); } public static void zipFiles(Collection<File> resFileList, File zipFile, String comment) throws IOException { ZipOutputStream zipout = new ZipOutputStream( new BufferedOutputStream(new FileOutputStream(zipFile), BUFF_SIZE)); for (File resFile : resFileList) { zipFile(resFile, zipout, ""); } zipout.setComment(comment); zipout.close(); } private static void zipFile(File resFile, ZipOutputStream zipout, String rootpath) throws FileNotFoundException, IOException { rootpath = rootpath + (rootpath.trim().length() == 0 ? "" : File.separator) + resFile.getName(); rootpath = new String(rootpath.getBytes("8859_1"), "GB2312"); if (resFile.isDirectory()) { File[] fileList = resFile.listFiles(); for (File file : fileList) { zipFile(file, zipout, rootpath); } } else { byte buffer[] = new byte[BUFF_SIZE]; BufferedInputStream in = new BufferedInputStream( new FileInputStream(resFile), BUFF_SIZE); zipout.putNextEntry(new ZipEntry(rootpath)); int realLength; while ((realLength = in.read(buffer)) != -1) { zipout.write(buffer, 0, realLength); } in.close(); zipout.flush(); zipout.closeEntry(); } } }