关于springmvc下服务器文件打包成zip格式下载功能

近期,项目要求把服务器存储的上传文件,批量下载到本地.参考网上资料,实现了服务器文件打包成压缩文件然后down到本地功能.
具体代码实现:
1、在服务器端创建一个临时zip格式文件
2、用jdk自带的API将服务器所有文件输入到zip文件中
3、将zip文件下载到本地，并删除服务器端zip文件

@RequestMapping(value = "/downloadZip.do")public String downloadFiles(String tcLwIds, HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException { List<File> files = new ArrayList<File>(); File Allfile = new File(request.getSession().getServletContext().getRealPath("/") + "upload/"); if (Allfile.exists()) { File[] fileArr = Allfile.listFiles(); for (File file2 : fileArr) { files.add(file2); } } String fileName = UUID.randomUUID().toString() + ".zip"; // 在服务器端创建打包下载的临时文件 String outFilePath = request.getSession().getServletContext().getRealPath("/") + "upload/"; File fileZip = new File(outFilePath + fileName); // 文件输出流 FileOutputStream outStream = new FileOutputStream(fileZip); // 压缩流 ZipOutputStream toClient = new ZipOutputStream(outStream); // toClient.setEncoding("gbk"); zipFile(files, toClient); toClient.close(); outStream.close(); this.downloadFile(fileZip, response, true); return null; }

将服务器文件存到压缩包中

public static void zipFile(List<File> files, ZipOutputStream outputStream) throws IOException, ServletException { try { int size = files.size(); // 压缩列表中的文件 for (int i = 0; i < size; i++) { File file = (File) files.get(i); zipFile(file, outputStream); } } catch (IOException e) { throw e; } } public static void zipFile(File inputFile, ZipOutputStream outputstream) throws IOException, ServletException { try { if (inputFile.exists()) { if (inputFile.isFile()) { FileInputStream inStream = new FileInputStream(inputFile); BufferedInputStream bInStream = new BufferedInputStream(inStream); ZipEntry entry = new ZipEntry(inputFile.getName()); outputstream.putNextEntry(entry); final int MAX_BYTE = 10 * 1024 * 1024; // 最大的流为10M long streamTotal = 0; // 接受流的容量 int streamNum = 0; // 流需要分开的数量 int leaveByte = 0; // 文件剩下的字符数 byte[] inOutbyte; // byte数组接受文件的数据 streamTotal = bInStream.available(); // 通过available方法取得流的最大字符数 streamNum = (int) Math.floor(streamTotal / MAX_BYTE); // 取得流文件需要分开的数量 leaveByte = (int) streamTotal % MAX_BYTE; // 分开文件之后,剩余的数量 if (streamNum > 0) { for (int j = 0; j < streamNum; ++j) { inOutbyte = new byte[MAX_BYTE]; // 读入流,保存在byte数组 bInStream.read(inOutbyte, 0, MAX_BYTE); outputstream.write(inOutbyte, 0, MAX_BYTE); // 写出流 } } // 写出剩下的流数据 inOutbyte = new byte[leaveByte]; bInStream.read(inOutbyte, 0, leaveByte); outputstream.write(inOutbyte); outputstream.closeEntry(); // Closes the current ZIP entry // and positions the stream for // writing the next entry bInStream.close(); // 关闭 inStream.close(); } } else { throw new ServletException("文件不存在！"); } } catch (IOException e) { throw e; } }

下载文件

 public void downloadFile(File file,HttpServletResponse response,boolean isDelete) {try { // 以流的形式下载文件。 BufferedInputStream fis = new BufferedInputStream(new FileInputStream(file.getPath())); byte[] buffer = new byte[fis.available()]; fis.read(buffer); fis.close(); // 清空response response.reset(); OutputStream toClient = new BufferedOutputStream(response.getOutputStream()); response.setContentType("application/octet-stream"); response.setHeader("Content-Disposition", "attachment;filename=" + new String(file.getName().getBytes("UTF-8"),"ISO-8859-1")); toClient.write(buffer); toClient.flush(); toClient.close(); if(isDelete) { file.delete(); //是否将生成的服务器端文件删除 } } catch (IOException ex) { ex.printStackTrace(); } } 

单个文件的下载

@RequestMapping(value="/singleDownload.do")public String singleDownload(String fileName, HttpServletRequest request, HttpServletResponse response)throws Exception{ response.setCharacterEncoding("utf-8"); response.setContentType("multipart/form-data"); response.setHeader("Content-Disposition", "attachment;fileName="+ fileName); String realPath = request.getSession().getServletContext().getRealPath("/"); String path = realPath+"upload/"; File file = new File(path+ File.separator + fileName); downloadFile(file, response, false); return null; }