java ssm框架 文件上传，获取不到文件

Question

     控制器中方法：
             @RequestMapping(value = "/upload2")
public void uploadFile2(HttpServletRequest request, HttpServletResponse response) {
    try {
        MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
        List<MultipartFile> fileList = multipartRequest.getFiles("file");

        for (MultipartFile mf : fileList) {
            if(!mf.isEmpty()){
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

    jsp页面：
    <form action="upload2" value="file" enctype="multipart/form-data" method="post" >
<div style="margin-bottom:10px;">
    <input type="file"    value="file" id="image" />
    <input type="submit"   value="提交" />
</div>

  xml配置文件：

<bean id="multipartResolver"
      class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="defaultEncoding" value="UTF-8" />

    <property name="maxUploadSize" value="2000000000" />
</bean>

    在控制器中multipartRequest.getFiles("file")获取的list为0，有大神知道问题出在哪吗？

Answer 1

jar包
CommonsMultipartResolver解析器依赖commons-fileupload和commons-io，加入如下jar包：
Commons-fileupload.jar
Commons-io.jar
在springmvc.xml中
配置多媒体解析器

<bean id="multipartResolver"
    class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <!-- 设置上传文件的最大尺寸为5MB -->
    <property name="maxUploadSize">
        <value>5242880</value>
    </property>
</bean>

图片上传
 controller：

//修改提交
@RequestMapping("/editItemSubmit")
public String editItemSubmit(Items items, MultipartFile pictureFile)throws Exception{

    //原始文件名称
    String pictureFile_name =  pictureFile.getOriginalFilename();
    //新文件名称
    String newFileName = UUID.randomUUID().toString()+pictureFile_name.substring(pictureFile_name.lastIndexOf("."));

    //上传图片
    File uploadPic = new java.io.File("F:/develop/upload/temp/"+newFileName);

    if(!uploadPic.exists()){
        uploadPic.mkdirs();
    }
    //向磁盘写文件
    pictureFile.transferTo(uploadPic);

.....

 页面：

form添加enctype="multipart/form-data"：

action="${pageContext.request.contextPath }/item/editItemSubmit.action"
method="post" enctype="multipart/form-data">