servlet.doc

servlet类package org.whatisjava.servlet;import java.io.File;import java.io.IOException;import java.util.List;import javax.servlet.ServletContext;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import mons.fileupload.FileItem;import mons.fileupload.disk.DiskFileItemFactory;import mons.fileupload.servlet.ServletFileUpload;public class UploadServlet extends HttpServlet public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException try / 用于设定诸如缓存之类的参数，和性能相关 / 此处用默认设定 DiskFileItemFactory dfif = new DiskFileItemFactory(); / 解析表单中的数据 ServletFileUpload upload = new ServletFileUpload(dfif); upload.setSizeMax(10 * 1024 * 1024); / 允许上传的最大值 List list = upload.parseRequest(request); / 开始解析request对象中的表单数据 / list中是FileItem对象 / 一个FileItem用于封装一个上传的文件数据 if (list.size() = 1) FileItem item = (FileItem) list.get(0); / 获得上文件的路径名 String name = item.getName(); name = name.substring(name.lastIndexOf() + 1); / 把上传的文件数据写入本地文（服务器端）件文件夹的名字为upload String path = upload; / Sun的标准，服务器实现的API ServletContext ctx = this.getServletContext(); path = ctx.getRealPath(path); File file = new File(path); if(!file.exists() System.out.println(创建文件夹); file.mkdir(); System.out.println(path); System.out.println(name); /将文件放到指定的地方 item.write(new File(path, name); response.sendRedirect(upload_form.jsp); catch (Exception e) throw new ServletException(file upload error!, e); 页面 上传 web.xml UploadServlet org.whatisjava.servlet.UploadServlet UploadServlet /upload jar包commons-io-1.3.2.jarcommons-fileupload-1.2.1.jarcommons-fileupload-1.2.1-javadoc.jarcommons-fileupload-1.2.1-sources.jar评论|3 囧wower新手 |来自团队Java老馆 |三级采纳率42%擅长：JAVA相关小说魔兽世界按默认排序|按时间排序 其他2条回答2011-04-15 11:53ylongshao1987|九级定义uploadActionForm，成员变量有String title，FormFile files，当文章上传是，在uploadaction中通过form拿到title和fiels，然后存文件夹就不用说了吧评论|0查看更多其他回答其他类似问题 2012-10-22 java中如何将上传的图片复制到指定文件夹中。 2010-09-07 java文件怎么传输 2010-09-17 java 怎么获得上传的多个文件 1 2010-11-02 java 文件操作 添加 1 2011-08-17 java如何区分上传的文件 更多关