java解压缩文件

压缩：

 // 压缩
    public static void zip(String zipFileName, String inputFile)
        throws Exception
    {
        File f = new File(inputFile);
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));
        zip(out, f, null);
        System.out.println("zip done");
        out.close();
    }
    
    // 压缩
    private static void zip(ZipOutputStream out, File f, String base)
        throws Exception
    {
        if (f.isDirectory())
        {
            File[] fc = f.listFiles();
            if (base != null)
                out.putNextEntry(new ZipEntry(base + "/"));
            base = base == null ? "" : base + "/";
            for (int i = 0; i < fc.length; i++)
            {
                if (fc[i].getName().endsWith(".vmb"))
                {
                    continue;
                }
                else
                {
                    zip(out, fc[i], base + fc[i].getName());
                }
                
            }
        }
        else
        {
            out.putNextEntry(new ZipEntry(base));
            FileInputStream in = new FileInputStream(f);
            int b;
            while ((b = in.read()) != -1)
                out.write(b);
            in.close();
        }
    }

解压：

// 解压
    public static void unZipFiles(String filePath, String directoryPath)
    {
        try
        {
            File filezip = new File(filePath);
            ZipFile zipFile = new ZipFile(filezip);
            
            Enumeration enu = zipFile.entries();
            String result = "";
            while (enu.hasMoreElements())
            {
                ZipEntry entry = (ZipEntry)enu.nextElement();
                String name = entry.getName();
                // 如果解压entry是目录,直接生成目录即可,不用写入,如果是文件,要讲文件写入
                String path = directoryPath + File.separator + name;
                result = result + path + "<br/>";
                File file = new File(path);
                if (entry.isDirectory())
                {
                    file.mkdirs();
                }
                else
                {
                    // 建议使用如下方式创建 流,和读取字节,不然会有乱码(当然要根据具体环境来定)
                    InputStream is = zipFile.getInputStream(entry);
                    byte[] buf1 = new byte[1024];
                    int len;
                    if (!file.exists())
                    {
                        file.getParentFile().mkdirs();
                        file.createNewFile();
                    }
                    OutputStream out = new FileOutputStream(file);
                    while ((len = is.read(buf1)) > 0)
                    {
                        String buf = new String(buf1, 0, len);
                        out.write(buf1, 0, len);
                    }
                    is.close();
                    out.flush();
                    out.close();
                }
            }
            
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        
    }