<!--thymeleaf--><dependency>
<groupId>org.thymeleaf</groupId>
<artifactId>thymeleaf-spring5</artifactId></dependency><dependency>
<groupId>org.thymeleaf.extras</groupId>
<artifactId>thymeleaf-extras-java8time</artifactId></dependency><!--数据库连接--><dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId></dependency><!--mybatis整合springboot--><dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.2</version></dependency><!--druid数据源--><dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.22</version></dependency>1234567891011121314151617181920212223242526272829
spring:
datasource:
type: com.alibaba.druid.pool.DruidDataSourceusername: rootpassword: shw123zxcurl: jdbc:mysql://localhost:3306/mybatis?useSSL=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTCdriver-class-name: com.mysql.cj.jdbc.Driver servlet:
multipart:
max-request-size: 10MB #上传文件的最大总大小
max-file-size: 10MB #上传单个文件的最大大小mybatis:
type-aliases-package: cn.codewei.pojo mapper-locations: classpath:/mapper/*.xml1234567891011121314
然后写一个文件上传的html，注意表单的==enctype属性要设置为multipart/form-data==
<!DOCTYPE html><html lang="en"><head>
<meta charset="UTF-8">
<title>Title</title></head><body>
<h1>文件上传</h1>
<form method="post" enctype="multipart/form-data" action="/upload">闷肢穗
<input type="file" name="file"饥举>
<input type="submit" value="上传">
</form></body></蚂卜html>1234567891011121314
然后写一个Mapper和对应的Mapper.xml和service
@Mapper@Repositorypublic interface PhotoMapper {
// 向数据库中添加图片
public int addPhoto(Photo photo)
// 从数据库中取出图片
public Photo getPhotoById(@Param("id") int id)}123456789
<?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="cn.codewei.mapper.PhotoMapper">
<insert id="addPhoto" parameterType="photo">
insert into image values (#{id},#{photo},#{photo_name},#{photo_type})</insert>
<select id="getPhotoById" resultType="photo">
select * from image where id=#{id}</select></mapper>123456789101112
在Controller中进行调用
上传
@Autowiredprivate PhotoService photoService@Autowiredprivate Photo photo@PostMapping("/upload")@ResponseBodypublic String upload(@RequestParam("file") MultipartFile file, HttpServletRequest request) throws IOException {
byte[] bytes = file.getBytes()
photo.setPhoto(bytes)
photo.setPhoto_name(file.getOriginalFilename())
photo.setPhoto_type(".jpg")
photoService.addPhoto(photo)
return "上传成功！"}123456789101112131415161718
取出，在页面中显示
@RequestMapping("/getPhoto")public String getImage(HttpServletResponse response) throws IOException {
Photo photo = photoService.getPhotoById(1)
byte[] photo1 = photo.getPhoto()
ServletOutputStream os = response.getOutputStream()
os.write(photo1)
os.close()
return ""}123456789
<!DOCTYPE html><html lang="en"><head>
<meta charset="UTF-8">
<title>Title</title></head><body>
<h1>首页</h1>
<img src="/getPhoto" width="200px" height="200px"></body></html>
MyBatis中，巧正可以使用Generator自动生成代码，包括DAO层、 MODEL层 、MAPPING SQL映射文件。第一步：下载MyBatis的Generator工具
htt p:/ /mybati s.gith ub.i o/generator/
第二步：配置自动生成代码所需的XML配置文件，例如（generator.xml）
将这个文件保存至你下载的mybatis-generator-core-1.3.2文件夹下
第三步：进入XML配置文件（generator.xml）所在的的目录并执行命令：
Dos代码
java -jar E:\mybatis-generator-core-1.3.2\lib\mybatis-generator-core-1.3.2.j ar -configfile generator.xml -overwrite
mybatis generator eclipse插件的安装
打开eclipse，点击Help>Software Update
选择 "Available Software" 标签，点击 "Add Site" 按钮
输入以下信息：
Location:htt p:/ /mybatis.googleco de.c om/svn/sub-projects/gen erator/trunk/eclipse/UpdateSite/
点击ok，自动进入"mybatis generator Feature"
点击逗install地按钮进行安装。。。。mybatis generator 插件安装完成
配置Mybatis Generator不要生成Example类
Mybatis Generator默认设置会生成一大堆罗哩罗嗦的Example类,主要是用各种不同的条件来 *** 作数据库,大部困咐分是用不到的,用到的时候手工修改mapper和接口文件就行了。
<</code>table
schema="general"
tableName="tb_table_name"
domainObjectName="EntityName"
enableCountByExample="false"
enableUpdateByExample="false"
enableDeleteByExample="false"汪宽纯
enableSelectByExample="false"
selectByExampleQueryId="false"
>
name="useActualColumnNames"
value="true"/>
</</code>table>
这样生成的mapper和dao接口就清爽多了。
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