jsp框架源码下载（jsp+servlet实现文件上传与下载源码）

本文目录

• jsp+servlet实现文件上传与下载源码
• 怎样利用网上下载的JSP源码组成一个系统网站

jsp+servlet实现文件上传与下载源码

上传：需要导入两个包：commons-fileupload-1.2.1.jar,commons-io-1.4.jarimport java.io.File;import java.io.IOException;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.fileupload.FileItem;import org.apache.commons.fileupload.disk.DiskFileItemFactory;import org.apache.commons.fileupload.servlet.ServletFileUpload;/** * 上传附件 * @author new * */public class UploadAnnexServlet extends HttpServlet { private static String path = ““; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } /* * post处理 * (non-Javadoc) * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { path = this.getServletContext().getRealPath(“/upload“); try { DiskFileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload up = new ServletFileUpload(factory); List《FileItem》 ls = up.parseRequest(request); for (FileItem fileItem : ls) { if (fileItem.isFormField()) { String FieldName = fileItem.getFieldName(); //getName()返回的是文件名字 普通域没有文件 返回NULL // String Name = fileItem.getName(); String Content = fileItem.getString(“gbk“); request.setAttribute(FieldName, Content); } else { String nm = fileItem.getName().substring( fileItem.getName().lastIndexOf(“\\“) + 1); File mkr = new File(path, nm); if (mkr.createNewFile()) { fileItem.write(mkr);//非常方便的方法 } request.setAttribute(“result“, “上传文件成功！“); } } } catch (Exception e) { e.printStackTrace(); request.setAttribute(“result“, “上传失败，请查找原因，重新再试！“); } request.getRequestDispatcher(“/pages/admin/annex-manager.jsp“).forward( request, response); }} 下载（i/o流）无需导包：import java.io.IOException;import java.net.URLEncoder;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/** * 下载文件 * @author * */public class DownloadFilesServlet extends HttpServlet { /** * */ private static final long serialVersionUID = 8594448765428224944L; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } /* * 处理请求 * (non-Javadoc) * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) */ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String name = request.getParameter(“fileName“); System.out.print(“dddddddddd:“ + name); // web绝对路径 String path = request.getSession().getServletContext().getRealPath(“/“); String savePath = path + “upload“; // 设置为下载application/x-download response.setContentType(“application/x-download“); // 即将下载的文件在服务器上的绝对路径 String filenamedownload = savePath + “/“ + name; // 下载文件时显示的文件保存名称 String filenamedisplay = name; // 中文编码转换 filenamedisplay = URLEncoder.encode(filenamedisplay, “UTF-8“); response.addHeader(“Content-Disposition“, “attachment;filename=“ + filenamedisplay); try { java.io.OutputStream os = response.getOutputStream(); java.io.FileInputStream fis = new java.io.FileInputStream( filenamedownload); byte b = new byte; int i = 0; while ((i = fis.read(b)) 》 0) { os.write(b, 0, i); } fis.close(); os.flush(); os.close(); } catch (Exception e) { } }}

怎样利用网上下载的JSP源码组成一个系统网站

一些做的比较好的源码确实值得下载研究,但首先你要能看得懂源码才行啊,那不是一天两天的功夫能办到的.说到合并这些源码形成一个系统网站那更不是初学者能办到的,一个完整的网站包括的内容很多,数据库的连接和使用,网站前台技术如 xhtml,css,dom,javascript等,之后是后台可以选择JSP,但还有dot net,PHP,ASP网站的整体构架,有了这些知识之后你还要会使用开发软件，Eclips,spring,struts,hibemate等。真想学习JSP，那就老老实实从头开始吧，网上有好多学习资源，只要你想学习，网上都能下载得到学习教程。