java压缩和好压缩例子

java压缩和解压缩例子
压缩时,在压缩文件夹中新建目录,entry名称必须以“/”结尾。
压缩后,如果用rar工具解压,发现中文名称的文件都是乱码,但是如果用java程序解压就不会有事,网上有很多关于这个问题及解决方案


	/**按照POS目录要求压缩文件
	 * @param out
	 * @param f
	 * @param base
	 * @param serverTime 14位的时间戳
	 * @param buzName 业务名称
	 * @throws Exception
	 */
	public static void zip4Pos(String zipFileName, String inputPath, String base, String buzName, String serverTime)
	{
		File f = new File(inputPath);
		ZipOutputStream out;
		logger.info("正在压缩:" + f.getName() + "... ...");
		try
		{
			out = new ZipOutputStream(new FileOutputStream(zipFileName));
			String buzp = buzName + "/";
			String yp = buzp + serverTime.substring(0,4)+"/";
			String mp = yp + serverTime.substring(4,6)+"/";
			out.putNextEntry(new ZipEntry(buzp)); 
			out.putNextEntry(new ZipEntry(yp)); 
			out.putNextEntry(new ZipEntry(mp)); 
			base = mp + f.getName();
			zip(out, f, base);
			out.close();
		}
		catch (Exception e)
		{
			logger.error(e);
			e.printStackTrace();
		}
		
	}
		

	private static void zip(ZipOutputStream out, File f, String base)
			throws Exception
	{
		logger.info("正在压缩:" + f.getName() + "... ...");
		if (f.isDirectory())
		{
			File[] fs = f.listFiles();
			base += "/";
			logger.info("新建目录条目:" + f.getName());
			out.putNextEntry(new ZipEntry(base)); // 生成相应的目录
			for (int i = 0; i < fs.length; i++)
			{
				// 对本目录下的所有文件对象递归调用本方法
				zip(out, fs[i], base + fs[i].getName());
			}
		}
		else
		{
			logger.info("新增文件条目:" + f.getName());
			out.putNextEntry(new ZipEntry(base));
			InputStream is = new FileInputStream(f);
			byte[] buf = new byte[1024];
			int len = 0;
			while ((len = is.read(buf)) != -1)
			{
				out.write(buf, 0, len);
			}
			is.close();
		}
	}
	
	/**
	 * 解压缩文件
	 * @param zipFile 
	 * @param desPath
	 */
	public static void unZip(File zipFile, String desPath)
	{

		// 建立输出流,用于将从压缩文件中读出的文件流写入到磁盘
		OutputStream out = null;
		// 建立输入流,用于从压缩文件中读出文件
		ZipInputStream is;
		try
		{
			is = new ZipInputStream(new FileInputStream(zipFile));
			ZipEntry entry = null;
			while ((entry = is.getNextEntry()) != null)
			{
				logger.info("正在解压缩:" + entry.getName() + "... ...");
				File f = new File(desPath + "\\" + entry.getName());
				if (entry.isDirectory())
				{
					logger.info("新建目录:" + f.getName());
					f.mkdir();
				}
				else
				{
					logger.info("新增文件:" + f.getName());
					// 根据压缩文件中读出的文件名称新建文件
					out = new FileOutputStream(f);
					byte[] buf = new byte[1024];
					int len = 0;
					while ((len = is.read(buf)) != -1)
					{
						out.write(buf, 0, len);
					}
					out.close();
				}
			}
			is.close();
		}
		catch (Exception e)
		{
			logger.error(e);
		}
	}