spring mvc上传、下载的实现

最新推荐文章于 2025-05-09 09:53:27 发布

原创最新推荐文章于 2025-05-09 09:53:27 发布 · 371 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#spring mvc

spring mvc 专栏收录该内容

3 篇文章

订阅专栏

本文介绍了如何使用Spring MVC实现文件下载和上传功能，包括控制器方法的编写、响应实体的设置以及文件读写操作的基本流程。

下载

//下载
    @RequestMapping(value="/download")
    public ResponseEntity<byte[]> download() throws IOException{
        String fileName = "test.txt";
        File downloadFile = new File("D:/test.txt");
        
        HttpHeaders headers = new HttpHeaders();  
        headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);  
        headers.setContentDispositionFormData("attachment", fileName);  
        
        return new ResponseEntity<byte[]>(FileUtils.readFileToByteArray(downloadFile),  
                                          headers, HttpStatus.CREATED);  
    }

上传

@RequestMapping(value = "/upload", method = RequestMethod.POST)
    public String upload(@RequestParam("name") String name,
            @RequestParam("file") MultipartFile file,RedirectAttributes attributes){
        System.out.println("param:"+name);
        if(!file.isEmpty()){
            System.out.println("upload ok");
        }
        
        attributes.addAttribute("name", "upload success");
        return "redirect:/login.jsp";
    }

spring配置文件

<!-- 文件上传解析器 -->
    <bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!-- one of the properties available; the maximum file size in bytes -->
        <property name="maxUploadSize" value="-1"/>
    </bean>