ssm实现文件下载

文件存放地址：

jsp页面代码：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>


    


下载1.txt
下载2.jpg
下载面试题.doc

控制器页面：

 @RequestMapping("downLoadFile")
    public ResponseEntity downFile(HttpServletRequest request, @RequestParam("fileName") String fileName) throws IOException {
        String path = request.getServletContext().getRealPath("/WEB-INF/upload/");
        File file = new File(path + fileName);
        HttpHeaders headers = new HttpHeaders();
        headers.setContentDispositionFormData("attachment", URLEncoder.encode(fileName, "utf-8"));
        return new ResponseEntity(FileUtils.readFileToByteArray(file), headers, HttpStatus.CREATED);
    }

运行效果图：