spring mvc file upload

文件上传

　　1.需要导入两个jar包

　　2.在SpringMVC配置文件中加入

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<!-- upload settings --> <bean id="multipartResolver"  class="org.springframework.web.multipart.commons.CommonsMultipartResolver">     <property name="maxUploadSize" value="102400000"></property> </bean>

　　3.方法代码

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@RequestMapping(value="/upload",method=RequestMethod.POST) public String upload(HttpServletRequest req) throws Exception{     MultipartHttpServletRequest mreq = (MultipartHttpServletRequest)req;     MultipartFile file = mreq.getFile("file");     String fileName = file.getOriginalFilename();     SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");            FileOutputStream fos = new FileOutputStream(req.getSession().getServletContext().getRealPath("/")+             "upload/"+sdf.format(new Date())+fileName.substring(fileName.lastIndexOf('.')));     fos.write(file.getBytes());     fos.flush();     fos.close();           return "hello"; }

　　4.前台form表单

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<form action="mvc/upload" method="post" enctype="multipart/form-data">     <input type="file" name="file"><br>     <input type="submit" value="submit"> </form>