postgre存儲bytea類型(blob)
![](https://img.laitimes.com/img/__Qf2AjLwojIjJCLyojI0JCLicmbw5SOzEGM5U2Y5IzMzMmN1EWOjVmY0ATY0gzYmVGOiJGMh9CX5d2bs92Yl1iclB3bsVmdlR2LcNWaw9CXt92Yu4GZjlGbh5yYjV3Lc9CX6MHc0RHaiojIsJye.png)
1.conrtoller
public Result<SysImageVO> uploadImg(SysImageVO sysImageVO, MultipartFile imgFile) throws IOException {
Result<SysImageVO> result = new Result<>();
sysImageVO.setContent(imgFile.getBytes());
sysImageService.uploadImg(sysImageVO);
return result;
}
public Result downloadImg(SysImageVO sysImageVO, HttpServletResponse response) throws IOException {
Result result = new Result();
// 業務處理
SysImageVO image = sysImageService.downloadImg(sysImageVO);
// 将content轉化
byte[] content = (byte[]) image.getContent();
// 設定檔案名
response.addHeader("Content-Disposition", "attachment;fileName=" + URLEncoder.encode(image.getName(), "UTF-8") + ";");
// 設定檔案大小
response.setContentLength(Integer.parseInt(image.getSize()));
// 将圖檔流通過response對象傳回
BufferedOutputStream bos = new BufferedOutputStream(response.getOutputStream());
bos.write(content);
bos.close();
return result;
}
2.entity
private Object content; //二進制流
3.mapper
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.vanpeng.resource.business.modular.image.dao.SysImageDao">
<resultMap type="xx.entity.ImageVO" id="ImageMap">
<result property="id" column="id" jdbcType="INTEGER"/>
<result property="name" column="name" jdbcType="VARCHAR"/>
<result property="content" column="content" jdbcType="BLOB"/> //bytea
</resultMap>
<!--新增圖檔-->
<insert id="uploadImg">
insert into sys_image(id, name, content)
values (#{id, jdbcType=INTEGER},#{name, jdbcType=VARCHAR}, #{content})
</insert>
<!--下載下傳圖檔-->
<select id="getImgById" resultMap="ImageMap">
select
id, name, content
from sys_image
where id = #{id}
</select>
</mapper>
4.service
service不多說,對象傳遞即可。