多文件打包下载

 /**
     * 下载
     * @param response
     * info 文件夹名
     * filenames  文件名们
     */
    @RequestMapping(value = "/imgdownload", method = RequestMethod.GET)
    public void imgDownload(GeneratorPojo generatorPojo, String info, HttpServletResponse response) throws Exception {
        generatorPojo.setSpecificPath("F:\\generotar\\jinbeijie-customer\\src\\main\\java\\com\\heyi\\jinbeijie\\platform\\");
        String filenames="";
        if(generatorPojo.getFileName() ==null || generatorPojo.getFileName() ==""){
            List<String> list =generatorService.getAllCode(generatorPojo.getFolderName(),generatorPojo.getSpecificPath());
            for(String l:list){
                if(filenames==""){
                    filenames=l;
                }else{
                    filenames=filenames+","+l;
                }
            }
        }else{
            filenames=generatorPojo.getFileName();
        }
        String[] names=filenames.split(",");
        String filepath=generatorPojo.getSpecificPath()+generatorPojo.getFolderName();
        //存放--服务器上zip文件的目录
        String directory = "D:\\repository\\"+generatorPojo.getFolderName();
        File directoryFile=new File(directory);
        if(!directoryFile.isDirectory() && !directoryFile.exists()){
            directoryFile.mkdirs();
        }
        //设置最终输出zip文件的目录+文件名
        String zipFileName = generatorPojo.getFolderName()+".zip";
        String strZipPath = directory+"\\"+zipFileName;
        ZipOutputStream zipStream = null;
        FileInputStream zipSource = null;
        BufferedInputStream bufferStream = null;
        File zipFile = new File(strZipPath);
        try{
            //构造最终压缩包的输出流
            zipStream = new ZipOutputStream(new FileOutputStream(zipFile));
            for (int i = 0; i<names.length ;i++){
                //解码获取真实路径与文件名
                String realFileName = java.net.URLDecoder.decode(names[i],"UTF-8");
                String realFilePath = java.net.URLDecoder.decode(filepath+"\\"+ names[i],"UTF-8");
                File file = new File(realFilePath);
                //TODO:未对文件不存在时进行操作，后期优化。
                System.out.println(realFilePath);
                System.out.println(file);
                if(file.exists()){
                    zipSource = new FileInputStream(file);//将需要压缩的文件格式化为输入流
                    /**
                     * 压缩条目不是具体独立的文件，而是压缩包文件列表中的列表项，称为条目，就像索引一样这里的name就是文件名,
                     * 文件名和之前的重复就会导致文件被覆盖
                     */
                    ZipEntry zipEntry = new ZipEntry(realFileName);//在压缩目录中文件的名字
                    zipStream.putNextEntry(zipEntry);//定位该压缩条目位置，开始写入文件到压缩包中
                    bufferStream = new BufferedInputStream(zipSource, 1024 * 10);
                    int read = 0;
                    byte[] buf = new byte[1024 * 10];
                    while((read = bufferStream.read(buf, 0, 1024 * 10)) != -1)
                    {
                        zipStream.write(buf, 0, read);
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            //关闭流
            try {
                if(null != bufferStream)
                {bufferStream.close();}
                if(null != zipStream){
                    zipStream.flush();
                    zipStream.close();
                }
                if(null != zipSource)
                {zipSource.close();}
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        //判断系统压缩文件是否存在：true-把该压缩文件通过流输出给客户端后删除该压缩文件  false-未处理
        if(zipFile.exists()){
            downImg(response,zipFileName,strZipPath);
            zipFile.delete();
        }
    }





    public void downImg(HttpServletResponse response,String filename,String path ) {
        if (filename != null) {
            FileInputStream is = null;
            BufferedInputStream bs = null;
            OutputStream os = null;
            try {
                File file = new File(path);
                if (file.exists()) {
                    //设置Headers
                    response.setHeader("Content-Type", "application/octet-stream");
                    //设置下载的文件的名称-该方式已解决中文乱码问题
                    response.setHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes("gb2312"), "ISO8859-1"));
                    is = new FileInputStream(file);
                    bs = new BufferedInputStream(is);
                    os = response.getOutputStream();
                    byte[] buffer = new byte[1024];
                    int len = 0;
                    while ((len = bs.read(buffer)) != -1) {
                        os.write(buffer, 0, len);
                    }
                } else {
                    response.sendRedirect("/imgUpload/imgList?error=" + "\"下载的文件资源不存在\"");
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            } finally {
                try {
                    if (is != null) {
                        is.close();
                    }
                    if (bs != null) {
                        bs.close();
                    }
                    if (os != null) {
                        os.flush();
                        os.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }