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(); // 业务处理 SysImageVO image = sysImageService.downloadImg(sysImageVO); // 将content转化 byte[] content = (byte[]) image.getContent(); // 设置文件名 response.addHeader("Content-Disposition", "attachment;fileName=" + URLEncoder.encode(image.getName(), "UTF-8") + ";"); // 设置文件大小 response.setContentLength(Integer.parseInt(image.getSize())); // 将图片流通过response对象返回 BufferedOutputStream bos = new BufferedOutputStream(response.getOutputStream()); bos.write(content); bos.close(); return result; }
2.entity
private Object content; //二进制流
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> <!--新增图片--> <insert id="uploadImg"> insert into sys_image(id, name, content) values (#{id, jdbcType=INTEGER},#{name, jdbcType=VARCHAR}, #{content}) </insert> <!--下载图片--> <select id="getImgById" resultMap="ImageMap"> select id, name, content from sys_image where id = #{id} </select> </mapper>
4.service
service不多说，对象传递即可。
