spring文件上传(使用第三方依赖)

导入依赖 jar

	
      commons-fileupload
      commons-fileupload
      1.4
    

Controller.java

    @RequestMapping("/uploadFile")
    public JsonResponse uploadFile(MultipartFile file, HttpServletRequest req){
        JsonResponse resp = new JsonResponse();

        //图片名
        String fileName = file.getOriginalFilename();
        String end = fileName.substring(fileName.lastIndexOf("."));
        String newName = UUIDUtil.getUUID()
                .replaceAll("-","")+end;

        //图片包
        ServletContext servletContext = req.getServletContext();
        String realPath = servletContext.getRealPath("/files");
        //创建包
        File filePath = new File(realPath);
        if(!filePath.exists()){
           filePath.mkdirs();
        }
        //包里写入图片
        File picPath = new File(realPath,newName);
        try {
            //写入
            file.transferTo(picPath);

            Pic pic = new Pic();
            pic.setId(UUIDUtil.getUUID());
            pic.setSavePath("/files/"+newName);
            pic.setOldName(fileName);

            resp.setCode(200);
            resp.setData(pic);
            resp.setMsg("上传成功!");
            return resp;
        } catch (IOException e) {
            e.printStackTrace();
        }
        resp.setCode(500);
        resp.setData("error");
        resp.setMsg("上传失败!");
        return resp;
    }

ApplicationContext.java
配置文件 配置文件上传

    
    @Bean
    public CommonsMultipartResolver multipartResolver(){
        CommonsMultipartResolver resolver = new CommonsMultipartResolver();
        resolver.setMaxUploadSize(1048576); //上传文件最大
        return resolver;
    }
}

上传成功 !