在服务器上创建Zip文件并使用java下载该zip文件

我有以下代码从mkyong到本地的zip文件。 但是，我的要求是在服务器上压缩文件并需要下载。 可以任何人帮助。

代码写入zipFiles：

public void zipFiles(File contentFile, File navFile) { byte[] buffer = new byte[1024]; try{ // i dont have idea on what to give here in fileoutputstream FileOutputStream fos = new FileOutputStream("C:\\MyFile.zip"); ZipOutputStream zos = new ZipOutputStream(fos); ZipEntry ze= new ZipEntry(contentFile.toString()); zos.putNextEntry(ze); FileInputStream in = new FileInputStream(contentFile.toString()); int len; while ((len = in.read(buffer)) > 0) { zos.write(buffer, 0, len); } in.close(); zos.closeEntry(); //remember close it zos.close(); System.out.println("Done"); }catch(IOException ex){ ex.printStackTrace(); } } 

我可以在fileoutputstream中提供什么？ contentfile和navigationfile是我从代码创建的文件。

Answer 1

如果您的服务器是servlet容器，只需编写一个HttpServlet来执行压缩并提供文件。

您可以将servlet响应的输出流传ZipOutputStream的构造函数，zip文件将作为servlet响应发送：

 ZipOutputStream zos = new ZipOutputStream(response.getOutputStream()); 

在压缩之前不要忘记设置响应mime类型，例如：

 response.setContentType("application/zip"); 

全貌：

 public class DownloadServlet extends HttpServlet { @Override public void doGet( HttpServletRequest request, HttpServletResponse response ) throws ServletException, IOException { response.setContentType("application/zip"); response.setHeader("Content-Disposition", "attachment; filename=data.zip"); // You might also wanna disable caching the response // here by setting other headers... try ( ZipOutputStream zos = new ZipOutputStream(response.getOutputStream()) ) { // Add zip entries you want to include in the zip file } } } 

Answer 2

尝试这个：

 @RequestMapping(value="download", method=RequestMethod.GET) public void getDownload(HttpServletResponse response) { // Get your file stream from wherever. InputStream myStream = someClass.returnFile(); // Set the content type and attachment header. response.addHeader("Content-disposition", "attachment;filename=myfilename.txt"); response.setContentType("txt/plain"); // Copy the stream to the response's output stream. IOUtils.copy(myStream, response.getOutputStream()); response.flushBuffer(); } 

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