JSP文件下载（不使用jar包）

开发技术作者： 2024-06-20 11:45:01

页面：java代码：public class Download extends HttpServlet { public Download() { super(); } public void d

页面：

java代码：

public class Download extends HttpServlet { public Download() { super(); } public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException { this.doPost(request,response); } public void doPost(HttpServletRequest request,IOException { String path = "D:/upload/哈哈哈.txt"; try { // path是指欲下载的文件的路径。 File file = new File(path); // 获得文件名。 String filename = file.getName(); // 获得文件的后缀名。 String ext = filename.substring(filename.lastIndexOf(".") + 1).toUpperCase(); // 以流的情势下载文件。 InputStream fis = new BufferedInputStream(new FileInputStream(path)); byte[] buffer = new byte[fis.available()]; fis.read(buffer); fis.close(); // 清空response response.reset(); // 设置response的Header response.addHeader("Content-Disposition","attachment;filename=" + new String(filename.getBytes("gb2312"),"ISO8859⑴")); response.addHeader("Content-Length","" + file.length()); OutputStream toClient = new BufferedOutputStream(response.getOutputStream()); response.setContentType("application/octet-stream"); toClient.write(buffer); toClient.flush(); toClient.close(); } catch (IOException ex) { ex.printStackTrace(); } } public void init() throws ServletException { // Put your code here } }