在使用SpringMVC 做上传时需要做的时在配置文件中配置

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

• bean 中 name 只能是 multipartResolver，在需要使用处理文件上传的方法添加 MultipartFile 参数

    @RequestMapping(value="/user/file/upload")
    public String upload(HttpSession session,Model model,MultipartFile file,String dir){
        //String root=((User)session.getAttribute("user")).getVhost().getDoc_root()+"/"+ParseTools.paramToString(dir)+"/"+file.getOriginalFilename();
        //服务器端文件存放的路径
        String root="e:/1.txt";
        try {
            FileUtils.copyInputStreamToFile(file.getInputStream(), new File(root));
            model.addAttribute("msg", "上传完成了");
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "user/message";
    }

下载： 与普通Servlet 下载类似

    @RequestMapping(value="/user/file/down")
    public ModelAndView down(HttpSession session,HttpServletRequest request,HttpServletResponse response,String f){
        String root=((User)session.getAttribute("user")).getVhost().getDoc_root()+"/"+f;
        BufferedInputStream bis =null;
        BufferedOutputStream bos=null;
        try {
            response.setHeader("Content-type", "application/octet-stream;"); 
            response.setHeader("Content-Disposition", "attachment;filename="+new String(f.substring(f.lastIndexOf("/")+1).getBytes("utf-8"), "ISO8859-1"));
            bis = new BufferedInputStream(new FileInputStream(root)); 
            bos = new BufferedOutputStream(response.getOutputStream());  
            byte[] buff = new byte[2048];
            while(bis.read(buff)!=-1){
                bos.write(buff); 
                buff=new byte[2048];  
            }
        } 
        catch (IOException e) {
            e.printStackTrace();
        }
        catch (Exception e) {
            System.out.println("down 没有正常关闭");
        }
        finally{
            if(bis!=null){
                try {
                    bis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(bos!=null){
                try {
                    bos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return null;
        //return "user/file/redownload";
    }

不过这里的异常好像拦截不住。 应该tomcat导致的(很多原因说是浏览器没有正常关闭导致的)。直接在控制台拦截不到， 感觉挺奇葩的