Spring中MultipartFile里的临时文件获取

最新推荐文章于 2025-04-21 09:30:00 发布

原创最新推荐文章于 2025-04-21 09:30:00 发布 · 1.7k 阅读

1 ·

CC 4.0 BY-SA版权

文章标签：

#spring #spring boot #java

spring-boot 专栏收录该内容

6 篇文章

订阅专栏

该段代码展示了如何在Spring MVC环境中处理上传的文件。它首先将`HttpServletRequest`转换为`MultipartHttpServletRequest`，然后尝试从`ApplicationPart`获取文件的`location`和`fileItem`字段。获取到的文件信息被打印出来，包括存储位置、绝对路径、文件名和规范化的路径。如果在处理过程中出现IOException、ServletException或IllegalAccessException，文件将被返回。

对于某些缓存文件信息敏感，需反复擦除

 @PostMapping("upload")
    public Object up(HttpServletRequest request){
        Object obj = null;
        File file = null;
        try {
            MultipartHttpServletRequest request1 = (MultipartHttpServletRequest) request;
            MultipartFile multipartFile = request1.getFile("file");
            ApplicationPart part = (ApplicationPart)request1.getPart("file");
            Class<?> Clazz = part.getClass();
            Field field;
            if ((field = getField(Clazz, "location")) != null){
                field.setAccessible(true);
                try {
                    obj = field.get(part);
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                }
            }
            file = (File) obj;

            if ((field = getField(Clazz, "fileItem")) != null){
                field.setAccessible(true);
                try {
                    obj = field.get(part);
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                }
            }
            file = (File) obj;

            DiskFileItem fileItem =(DiskFileItem)obj;

            log.info(fileItem.getStoreLocation().toString());
            log.info(obj.toString());
            log.info(file.getAbsolutePath());
            log.info(file.getName());
            log.info(file.getCanonicalPath());
        } catch (IOException e) {
            e.printStackTrace();
            return  file;
        } catch (ServletException e) {
            e.printStackTrace();
            return  file;
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        return  file;
    }