在Spring Boot 3整合MyBatis，你需要做以下几个步骤：
- 添加依赖：在
pom.xml中添加Spring Boot Starter和MyBatis的依赖。
<dependencies>
<!-- Spring Boot Starter -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- MyBatis -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>3.0.0</version> <!-- 使用MyBatis 3.0.0版本 -->
</dependency>
<!-- 数据库驱动，例如MySQL -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.28</version>
</dependency>
</dependencies>- 配置数据库和MyBatis：在
application.properties或application.yml中配置数据库和MyBatis。
# 数据库配置
spring.datasource.url=jdbc:mysql://localhost:3306/your_database?useSSL=false&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=yourpassword
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
# MyBatis 配置
mybatis.mapper-locations=classpath:mapper/*.xml
mybatis.type-aliases-package=com.yourpackage.model- 创建Mapper接口和Mapper XML文件：
// UserMapper.java
package com.yourpackage.mapper;
public interface UserMapper {
User selectUserById(int id);
}
<!-- UserMapper.xml -->
<?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.yourpackage.mapper.UserMapper">
<select id="selectUserById" resultType="com.yourpackage.model.User">
SELECT * FROM users WHERE id = #{id}
</select>
</mapper>- 创建Service和Service实现类：
// UserService.java
package com.yourpackage.service;
public interface UserService {
User getUserById(int id);
}
// UserServiceImpl.java
package com.yourpackage.service;
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserMapper userMapper;
@Override
public User getUserById(int id) {
return userMapper.selectUserById(id);
}
}- 创建Controller：
// UserController.java
package com.yourpackage.controller;
@RestControll