1. 首先在pom文件中导入Mybatis所需要的依赖

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<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.1</version>
</dependency>

2. 在application.yaml中配置相应的信息

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spring:
datasource:
username: root
password: 123456
#?serverTimezone=UTC解决时区的报错
url: jdbc:mysql://
driver-class-name: com.mysql.cj.jdbc.Driver
type: com.alibaba.druid.pool.DruidDataSource

这样基本的配置就完事了,接下来就需要测试了

3. 创建实体类

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package com.bestrookie.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Department {
private Integer id;
private String departmentName;
}

4. 创建mapper目录以及对应的Mapper接口

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//@Mapper : 表示本类是一个 MyBatis 的 Mapper
@Mapper
@Repository
public interface DepartmentMapper {
// 获取所有部门信息
List<Department> getDepartments();
// 通过id获得部门
Department getDepartment(Integer id);
}

5. 创建对应的Mapper映射文件(DepartmentMapper.xml)

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<?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.bestrookie.mapper.DepartmentMapper">
<select id="getDepartments" resultType="Department">
select * from department;
</select>
<select id="getDepartment" resultType="Department" parameterType="int">
select * from department where id = #{id};
</select>
</mapper>

6. 这样就大功告成只需要创建Contronller类就可以调用相应的方法

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@RestController
public class DepartmentController {
@Autowired
DepartmentMapper departmentMapper;
// 查询全部部门
@GetMapping("/getDepartments")
public List<Department> getDepartments(){
return departmentMapper.getDepartments();
}
// 查询全部部门
@GetMapping("/getDepartment/{id}")
public Department getDepartment(@PathVariable("id") Integer id){
return departmentMapper.getDepartment(id);
}
}

7. 完结撒花

timg

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