2018-10-08spring文件上传下载

一,单文件上传,页面部分

<form action="singleFilepload" method="post" enctype="multipart/form-data">涉及图片要用post提交,要设置enctype="multipart/form-data"

    选择上传的文件:<input type="file" name = "myfile" ><br>

    <input type="submit"value="上传">

    </form>

控制器部分

注解@RequestMapping("singleFilepload")

方法public String func1(@RequestBody MultipartFile(或者用CommonsMultipartFile这个类) myfile传入的nama,HttpSession session用来取路径,Model model保存一些值 ){

String path = session.getServletContext().getRealPath("") +"/upload";取到的路径

File destFile = new File(path,myfile.getOriginalFilename());新建文件

if(!destFile.exists()){

destFile.mkdirs();

}

try {

myfile.transferTo(destFile);//转存到destFile

} catch (IllegalStateException | IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

model.addAttribute("uploadFile",destFile.getAbsolutePath());

return "success";//返回success的jsp页面

}

需要在mvc的配置文件中加文件上传的配置

<!-- 文件上传 -->

    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

        <!-- 设置上传文件总大小限制 -->

        <property name="maxUploadSize" value="10000000"></property>

    </bean>

二,多文件上传

String path = request.getServletContext().getRealPath("") +"/upload";

//文件解析器

CommonsMultipartResolver resolver = new CommonsMultipartResolver(request.getServletContext());

//如果是文件

  if(resolver.isMultipart(request)){

  MultipartHttpServletRequest mtp = (MultipartHttpServletRequest)request;

  Iterator <String> iterator = mtp.getFileNames();

  while(iterator.hasNext()){

  MultipartFile multipart = mtp.getFile(iterator.next());

  saveFIle(f.path);

  }

model.addAttribute("uploadFile",path);

return "success";