文件的上传对表单的要求

<!-- 上传文件:表单要求1，enctype="multipart/form-data"2.表单中需要有type="file"的input3.表单的请求方式一定是POST。即method="post"servlet要求1.不能使用request.getParameter2.使用request.getInputStream --><form action="/file_upload/RegistServlet" method="post" enctype="multipart/form-data"> ???用户：<input name="username" type="text"><br> ???注册：<input name="password" type="password"><br> ???照片：<input name="pic" type="file" ><br> ???<input type="submit" value="提交"></form>

 ???????//获得复杂类型表单的输入流 ???????InputStream in = request.getInputStream(); ???????//获得输入流的内容 ???????String result = IOUtils.toString(in);

public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ???????//创建接受文件的工厂类 ???????DiskFileItemFactory factory = new DiskFileItemFactory(); ???????//创建文件解析对象 ???????ServletFileUpload sfu = new ServletFileUpload(factory); ???????????????try { ???????????//解析request,获得表单中的每一文件（包含普通文本域）项 ???????????List<FileItem> list = sfu.parseRequest(request); ???????????//遍历每一个文本项 ???????????for(FileItem fi : list){ ???????????????//获得原始文件名 ???????????????String origFileName = fi.getName(); ???????????????//获得文本域项的内容 ???????????????String content = fi.getString(); ???????????????//获得文本域的名字 ???????????????String fieldName = fi.getFieldName(); ???????????????//文本域的内容的类型 ???????????????String ContentType = fi.getContentType(); ???????????????//获得文件的大小（以字节为单位） ???????????????long size = fi.getSize(); ???????????????//是否是普通文本（普通文本就是非长传文件形式的文本）true代表普通字段，false是文件字段 ???????????????boolean isFieldForm = fi.isFormField(); ???????????????System.out.println("原始文件名："+origFileName); ???????????????System.out.println("文本项的内容："+content); ???????????????System.out.println("文本域的名字："+fieldName); ???????????????System.out.println("文本域的内容类型："+ContentType); ???????????????System.out.println("文件大小："+size); ???????????????System.out.println("是否是普通字段："+isFieldForm); ???????????????System.out.println("-----------------------------------"); ???????????} ???????} catch (FileUploadException e) { ???????????// TODO Auto-generated catch block ???????????e.printStackTrace(); ???????} ???}