多文件下载------打包下载

- 日理万妓 2022-05-12 00:58 256阅读 0赞

@RequestMapping("/batchDownLoad")
        @ResponseBody
        public void batchDownLoad(HttpServletRequest request,HttpServletResponse response,String fileNames) {
    
            Map<String,String> map=new HashMap<>();
            String[] files=fileNames.split(",");
            for(String fileName:files){ 
            //将多个文件的文件名和地址放入map集合，以便打包时使用，其中SysFileUtils是自己封装的获取文件路径的方法，大家可以根据自己的习惯来定义
                map.put(fileName,SysFileUtils.getFilePath()+ fileName);   
    //下载的压缩包的名称，可根据自己的需求自行更改
            String fileName = "批量下载.zip";
            //获取文件路径，此处为的文件路径为压缩包的临时路径
            String realPath = request.getSession().getServletContext().getRealPath("/");
            try {
            //调用文件打包方法
                zipFile(map,realPath,fileName);
            realPath = realPath + fileName;
            //以流的形式下载文件
            BufferedInputStream fis = new BufferedInputStream(new FileInputStream(realPath));
            byte[] buffer = new byte[fis.available()];
            fis.read(buffer);
            fis.close();
            //清空
             response.reset();
            OutputStream toClient = new BufferedOutputStream(response.getOutputStream());response.setContentType("application/octet-stream");
             response.setHeader("Content-Disposition", "attachment;filename=" + new String(fileName.getBytes("UTF-8"),"ISO-8859-1"));
            toClient.write(buffer);
            toClient.flush();
            toClient.close();
            } catch (Exception e) {
    
                e.printStackTrace();
            }
        }

/** * 文件打包 * @author niuyuhui * @param map * @param rootPath * @param fileName * @throws Exception */
        public void zipFile(Map<String,String>  map, String rootPath, String fileName) throws Exception{
            File zipFile = new File(rootPath + "/" + fileName);
            if (zipFile.exists()) {
                zipFile.delete();
            }
            ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(rootPath + "/" + fileName));
            ZipEntry ze = null;
            byte[] buf = new byte[1024];
            int readLen = 0;
            for (Map.Entry<String, String> entry : map.entrySet()) {
                ze = new ZipEntry(entry.getKey());//设置下载文件名称
                zos.putNextEntry(ze);
                String absoluteFileName = entry.getValue();//文件绝对路径
                InputStream is = new BufferedInputStream(new FileInputStream(absoluteFileName));
                while ((readLen = is.read(buf, 0, 1024)) != -1) {
                    zos.write(buf, 0, readLen);
                }
                is.close();
            }
            zos.close();
        }