mysql数据库的文件上传与下载

目录

mysql数据库的文件上传

mysql数据库的文件下载

---

mysql数据库的文件上传

1.文件实体类的该字段用 bytes数组

/**
     * 文件流
     */
    @TableField(value = "accessory",typeHandler = BlobTypeHandler.class)
    private byte[] accessory;

 

2.因为实体类为字节流数组，上传时直接新增拿实体类就可以

mysql数据库的文件下载

 //根据附件id取出附件
        ProductAccessoryFile file = productAccessoryService.downloadAccessory(accessoryId);

        byte[] accessory = file.getAccessory();
        //文件名称
        String name = productAccessory.getAccessoryName();
        try {
            //转换成byte
            name = URLEncoder.encode(name, "UTF-8");
            response.setContentType("application/vnd.ms-excel;charset=UTF-8");
            response.setHeader("Content-Disposition", "attachment;filename=" + name);
            response.getOutputStream().write(accessory);
            response.getOutputStream().flush();

        } catch (RestClientException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }