Java打包文件目录问 zip文件

Java打包文件目录问 zip文件。

/**
 * 资源打包下载类
 * Created by Ruan Banshu on 2015/4/13.
 */
public class ZipOpUtil {

    private static Logger logger = LoggerFactory.getLogger(ZipOpUtil.class);
    /**
     * 将多个文件打包到一个zip中
     *
     * @param sourceFolder
     * @param zipFile
     * @return
     */
    public static boolean zipFile(String sourceFolder, File zipFile){
        boolean isOk = true;
        File f = new File(sourceFolder);
        ZipOutputStream out = null;
        try{
            if(!f.exists()){
                f.mkdirs();
            }
            out = new ZipOutputStream(new FileOutputStream(zipFile));
            zip(out, f, "");
            out.flush();
            FileUtils.deleteDirectory(f);
        } catch (Exception e){
            e.printStackTrace();
            throw new AppException("压缩文件出错！");
        } finally
        {
            if(null != out){
                try{ out.close(); } catch (Exception e){ e.printStackTrace();}
            }
        }
        return isOk;
    }

    /**
     * 递归压缩文件
     * @param out
     * @param f
     * @param base
     * @throws Exception
     */
    private static void zip(ZipOutputStream out, File f, String base) throws Exception {
        if (f.isDirectory()) {
            File[] fl = f.listFiles();
            out.putNextEntry(new ZipEntry(base + "/"));
            base = base.length() == 0 ? "" : base + "/";
            for (int i = 0; i < fl.length; i++) {
                zip(out, fl[i], base + fl[i].getName());
            }
        }else {
            out.putNextEntry(new ZipEntry(base));
            FileInputStream in = new FileInputStream(f);
            int b;
            logger.info(base);
            while ( (b = in.read()) != -1) {
                out.write(b);
            }
            in.close();
        }
    }

    /**
     * 下载单个文件
     *
     * @param file
     * @param request
     * @param response
     * @return
     */
    public static boolean downFile(File file, HttpServletRequest request, HttpServletResponse response) {
        boolean isOk = true;
        OutputStream myout = null;
        FileInputStream fis = null;
        BufferedInputStream buff = null;
        HttpSession session = request.getSession();
        if (session != null) {
            session.setAttribute("state", "");
        }
        try {
            response.setContentType("application/x-msdownload");
            response.setContentLength((int) file.length());
            response.setHeader("content-disposition", "attachment;filename=" + new String(file.getName().getBytes("utf-8"), "ISO8859-1"));
            fis = new FileInputStream(file);
            buff = new BufferedInputStream(fis);
            byte[] b = new byte[1024 * 10];//相当于我们的缓存
            long k = 0;//该值用于计算当前实际下载了多少字节
            //从response对象中得到输出流,准备下载
            myout = response.getOutputStream();
            while (k < file.length()) {
                int j = buff.read(b, 0, b.length);
                k += j;
                //将b中的数据写到客户端的内存
                myout.write(b, 0, j);
            }
            myout.flush();
        } catch (Exception e) {
            e.printStackTrace();
            isOk = false;
        } finally {
            try {
                if (null != myout) {
                    myout.close();
                    myout = null;
                }
                if (null != buff) {
                    buff.close();
                    buff = null;
                }
                if (null != fis) {
                    fis.close();
                    fis = null;
                }
                if(file.exists()){
                    ZipOpUtil.delFile(file);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return isOk;
    }

    /**
     * 删除单个文件
     *
     * @param file
     * @return
     */
    public static boolean delFile(File file) {
        boolean isOk = true;
        try {
            if (file.isFile() && file.exists()) {
                file.delete();
            }
        } catch (Exception e) {
            e.printStackTrace();
            isOk = false;
        } finally {
            // log ...
        }
        return isOk;
    }