fileupload上传文件，isMultipartContent(request) 老为flase

totsheng 2012-07-31 10:56:14

一个上传文件的功能，老提示isMultipartContent(request) 为flase，请问什么原因？
不罗嗦直接发部分代码

前台页面代码



<form name="postForm" action="paeaReportExample.do?method=addPaeaReportExample" enctype="multipart/form-data" method="post"> 

				<table bgcolor="ece9d8" width="100%" border="0" cellpadding="1"

					cellspacing="1" align="center">

					<tr height=25>

						<td 

							style="color:ffffff;background: url(<%=Parameters.pathPrefix%>images/subnav_bkgd.gif)"

							bgcolor="#0080c0">

							<img style='margin-bottom:-3px'  src="<%=Parameters.pathPrefix%>images/tb.gif">

							填写案例档案表信息

						</td>

						<td  colspan=4 align="left" style="background: url(<%=Parameters.pathPrefix%>images/subnav_bkgd.gif)"

							bgcolor="#0080c0">

							<input class="ouu" type=button value="  保存"

								onclick="_submitForm(postForm)"

								style="background: url(<%=Parameters.pathPrefix%>images/187_1.gif) no-repeat; background-position:5px 1; background-color: #7eaaed">

							<input class="ouu" type=button value="  返回"

								onclick="window.close()"

								style="background: url(<%=Parameters.pathPrefix%>images/100_2.gif) no-repeat; background-position:5px 1; background-color: #7eaaed">

						</td>



					</tr>

					<tr height=5><td colspan="4"></td></tr>

 					<tr>

							<td align=right bgcolor="cacaca">

								标题：<font color=red>*</font>

							</td>

							<td bgcolor="dedede" width="200">

								<input type="text" name="name" style="width: 160px">

 							</td>							

					</tr>

					<tr height=5><td colspan="4"> </td></tr>

 					<tr>

							<td align=right bgcolor="cacaca">

								选择文件：<font color=red>*</font>

							</td>

							<td bgcolor="dedede" width="200">

							 <input type="file" name="upload" size="50">

 							</td>							

					</tr>





  					</table>			

 			</form>



private void upload(HttpServletRequest request,String uploadPath) throws Exception {  

        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddhhmmss");  

        File tmpDir = new File("d://temp"); //初始化上传文件的临时存放目录,必须是绝对路径  

        try {  

        	System.out.println("---ServletFileUpload.isMultipartContent(request)---"+ServletFileUpload.isMultipartContent(request));

            if (ServletFileUpload.isMultipartContent(request)) {  

                DiskFileItemFactory factory = new DiskFileItemFactory();  

                //指定在内存中缓存数据大小,单位为byte,这里设为1Mb   

                factory.setSizeThreshold(1 * 1024 * 1024);   

                //设置一旦文件大小超过getSizeThreshold()的值时数据存放在硬盘的目录   

                factory.setRepository(tmpDir);   

                ServletFileUpload sfu = new ServletFileUpload(factory);  

                 // 指定单个上传文件的最大尺寸,单位:字节，这里设为5Mb   

                sfu.setFileSizeMax(5 * 1024 * 1024);  

                //指定一次上传多个文件的总尺寸,单位:字节，这里设为10Mb   

                sfu.setSizeMax(10 * 1024 * 1024);   

                sfu.setHeaderEncoding("UTF-8"); //设置编码，因为我的jsp页面的编码是utf-8的   

                FileItemIterator fii = sfu.getItemIterator(request);// 解析request请求   

                uploadPath = uploadPath + "upload//"; // 选定上传的目录此处为当前目录  

                if (!new File(uploadPath).isDirectory()){  

                    new File(uploadPath).mkdirs(); //选定上传的目录此处为当前目录，没有则创建   

                }  

                  

                int index = 0;  

                while (fii.hasNext()) {  

                    FileItemStream fis = fii.next();// 从集合中获得一个文件流   

                    if (!fis.isFormField() && fis.getName().length() > 0) {// 过滤掉表单中非文件域   

                        String fileName = fis.getName().substring(  

                                fis.getName().lastIndexOf("."));// 获得上传文件的文件名   

                        fileName = sdf.format(new Date())+"-"+index+fileName;  

                        BufferedInputStream in = new BufferedInputStream(fis.openStream());   

                        BufferedOutputStream out = new BufferedOutputStream(  

                                new FileOutputStream(new File(uploadPath + "//" + fileName)));  

                        Streams.copy(in, out, true); // 开始把文件写到你指定的上传文件夹   

                        index++;  

                    }  

                }  

  

            }  

        } catch (Exception e) {  

            e.printStackTrace();  

        }  

    }