jsp文件上传与下载实例代码
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中文源码网 浏览：318 次 日期：2024-04-23 03:08:22
【下载文档: jsp文件上传与下载实例代码.txt 】
jsp文件上传与下载实例代码
文件上传： 复制代码 代码如下: public class UploadServlet extends HttpServlet{ @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doPost(req, resp); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { SmartUpload myupload = new SmartUpload(); ServletConfig config = getServletConfig(); myupload.initialize(config,req,resp); resp.setContentType("text/html"); resp.setCharacterEncoding("utf-8"); PrintWriter out = resp.getWriter(); out.println("
处理上传的文件
"); out.println("
"); try { myupload.setMaxFileSize(1024*1024); myupload.setTotalMaxFileSize(5*1024*1024); myupload.setAllowedFilesList("doc,txt,jpg,gif"); myupload.setDeniedFilesList("exe,bat,jsp,htm,html"); myupload.upload();//上传文件，此项是必须的 int count = myupload.getFiles().getCount(); Request myRequest = myupload.getRequest(); String rndFilename,fileExtName,fileName,filePathName; Date dt = null; SimpleDateFormat fmt = new SimpleDateFormat("yyyyMMdd"); //一一提取上传文件信息，同时可保持文件 for(int i = 0; i < count; i++){ File file = myupload.getFiles().getFile(i); if(file.isMissing()) continue; fileName = new String(file.getFileName().getBytes(),"utf-8");//获取文件名 filePathName = new String(file.getFilePathName().getBytes(),"utf-8"); fileExtName = file.getFileExt(); dt = new Date(System.currentTimeMillis()); Thread.sleep(100); rndFilename = fmt.format(dt)+i+"."+fileExtName; out.println("第"+(i+1)+"个文件的文件信息：
"); out.println(" 文件名为："+fileName+"
"); out.println(" 文件扩展名为："+fileExtName+"
"); out.println(" 文件全名："+filePathName+"
"); out.println(" 文件大小："+file.getSize()/1024+"kb
"); //创建文件保存位置 ServletContext context = req.getServletContext(); String savePath = context.getRealPath("/upload/"); java.io.File folder = new java.io.File(savePath); if(!folder.exists()){ folder.mkdirs(); } out.println(" 文件保存路径："+savePath); file.saveAs(savePath+"/"+rndFilename,SmartUpload.SAVE_PHYSICAL); } } catch (Exception e) { out.println("文件上传失败！！！！"); e.printStackTrace(); } out.flush(); out.close(); } } 复制代码 代码如下: <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="com.jspsmart.upload.*" %> <% //设定请求编码方式，否则遇到中文就会乱码 request.setCharacterEncoding("utf-8"); %>
上传文件实例 上传文件实例
请选择上传文件数量：
文件下载： 复制代码 代码如下: <% response.setContentType("application/x-download");//设置为下载application/x-download String filedownload = "/要下载的文件名";//即将下载的文件的相对路径 String filedisplay = "最终要显示给用户的保存文件名";//下载文件时显示的文件保存名称 String filenamedisplay = URLEncoder.encode(filedisplay,"UTF-8"); response.addHeader("Content-Disposition","attachment;filename=" + filedisplay); try { RequestDispatcher dis = application.getRequestDispatcher(filedownload); if(dis!= null) { dis.forward(request,response); } response.flushBuffer(); } catch(Exception e) { e.printStackTrace(); } finally { } %>
