文件下载时heard头content-disposition无法添加

ゞ浴缸里的玫瑰 2023-01-17 09:22 78阅读 0赞

今天一个傻逼问题，在下载文件时，文件名全部都是downloadFile，找半天发现问题所在

原下载代码如下：

public FileBaseInfoDO downloadFile(HttpServletResponse response) throws ServiceException {
            File file = new File("C:\\Users\\10710\\Desktop\\test");
             String safeName =+ "1234567653.bin";
            if (!file.exists())
                throw new ServiceException(GlobalCode.NOT_FIND_THIS_FILE);
            try (FileInputStream fileInputStream = new FileInputStream(file)){
               
                IOUtils.copy(fileInputStream,response.getOutputStream());
                response.setHeader("content-disposition", "attachment;filename=" + URLEncoder.encode(safeName, "utf-8"));
                return info;
            } catch (IOException e) {
                log.error("从文件服务器下载文件失败,文件hash为:{" + filepath + "} 异常原因为:{}", e);
                throw new ServiceException(GlobalCode.DATA_ERROR);
            }
        }

问题解决：  
将代码中的下边两句调换一下位置

IOUtils.copy(fileInputStream,response.getOutputStream());
     response.setHeader("content-disposition", "attachment;filename=" + URLEncoder.encode(safeName, "utf-8"));

修改后：

public FileBaseInfoDO downloadFile(HttpServletResponse response) throws ServiceException {
            File file = new File("C:\\Users\\10710\\Desktop\\test");
             String safeName =+ "1234567653.bin";
            if (!file.exists())
                throw new ServiceException(GlobalCode.NOT_FIND_THIS_FILE);
            try (FileInputStream fileInputStream = new FileInputStream(file)){
                response.setHeader("content-disposition", "attachment;filename=" + URLEncoder.encode(safeName, "utf-8"));
                IOUtils.copy(fileInputStream,response.getOutputStream());
                return info;
            } catch (IOException e) {
                log.error("从文件服务器下载文件失败,文件hash为:{" + filepath + "} 异常原因为:{}", e);
                throw new ServiceException(GlobalCode.DATA_ERROR);
            }
        }