需要下载：commons-fileupload-1.2.1-bin.zip commons-io-1.4-bin.zip
http://apache.etoak.com/commons/fileupload/binaries/
http://apache.etoak.com/commons/io/binaries/
<%@ page contentType="text/html;charset=GBK" import="java.io.*,java.util.*"%><%@ page import="org.apache.commons.fileupload.disk.*,org.apache.commons.fileupload.*,org.apache.commons.fileupload.servlet.*"%><%DiskFileItemFactory factory = new DiskFileItemFactory();//设置上传工厂的限制factory.setSizeThreshold(1024 * 1024 * 20);factory.setRepository(new File(request.getRealPath("/")));//创建一个上传文件的ServletFileUpload对象ServletFileUpload upload = new ServletFileUpload(factory);//设置最大的上传限制upload.setSizeMax(1024 * 1024 * 20);//处理HTTP请求，items是所有的表单项List items = upload.parseRequest(request);//遍历所有的表单项for (Iterator it = items.iterator(); it.hasNext() ; ){ FileItem item = (FileItem)it.next(); if (item.isFormField()) { String name = item.getFieldName(); String value = item.getString("GBK"); out.println("表单域的name=value对为:" + name + "=" + value); } else { System.out.println("----------------------"); //取得文件域的表单域名 String fieldName = item.getFieldName(); //取得文件名 String fileName = item.getName(); //取得文件类型 String contentType = item.getContentType(); FileOutputStream fos = new FileOutputStream( request.getRealPath("/") + System.currentTimeMillis() + fileName.substring(fileName.lastIndexOf(".") , fileName.length())); if (item.isInMemory() ) { fos.write(item.get()); } else { InputStream is = item.getInputStream(); byte[] buffer = new byte[1024]; int len; while ((len = is.read(buffer)) > 0 ) { fos.write(buffer , 0 , len); } is.close(); fos.close(); } }}%>
