<form action="${web}/upload" method="post" enctype="multipart/formdata"> <div style="margin :0px auto; width:990px;"> <input type="file" name="file" id="doc" multiple="multiple" onchange="javascript:setImagePreviews();" accept="image/*" /> <!-- <div id="dd" style=" width:990px;"></div> --> </div> <input type="submit" /> </form>
这段代码 提交后台为什么
MultipartHttpServletRequest multipartRequest = null;
try {
multipartRequest = (MultipartHttpServletRequest) request;
} catch (Exception ex) {
logger.error(String.format("文件上传失败,异常原因:%s", ex));
return map;
}
为什么转换就不成功???