SpringBoot整合Mybatis（配置文件）

左手的ㄟ右手 2022-03-08 06:10 506阅读 0赞

### 一、引入jar ###

<dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>1.3.3</version>
    </dependency>

### 二、创建JavaBean ###

public class Employee {
        private Integer id;
        private String lastName;
        private Integer gender;
        private String email;
        private Integer dId;
    
        public Integer getId() {
            return id;
        }
    ...

### 三、创建Mapper接口 ###

public interface EmployeeMapper {
        public Employee getEmpById(Integer id);
        public void insertEmp(Employee employee);
    }

### 四、搭建XML文件配置 ###

1）、结构：可自行定义

![20190314144849949.png][]

2）、yml文件中指定mybatis全局配置文件和接口映射文件位置

mybatis:
      config-location: classpath:mybatis/mybatis-config.xml
      mapper-locations: classpath:mybatis/mapper/*.xml

3）、查看官网复制主配置文件模板修改如下

网址：[http://www.mybatis.org/mybatis-3/][http_www.mybatis.org_mybatis-3]

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE configuration
            PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
            "http://mybatis.org/dtd/mybatis-3-config.dtd">
    <configuration>
        <settings>
            <setting name="mapUnderscoreToCamelCase" value="true"/>
        </settings>
    </configuration>

4）、查看官网复制接口映射文件模板修改如下

<?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.zhq.springboot.mapper.EmployeeMapper">
        
        <select id="getEmpById" resultType="com.zhq.springboot.bean.Employee">
           select * from employee where id=#{id}
        </select>
        
        <insert id="insertEmp" >
            insert  into employee(lastName,email,gender,d_id) values(#{lastName},#{email},#{gender},#{d_id})
        </insert>
    </mapper>

### 五、编写接口测试 ###

@GetMapping("emp/{id}")
        public Employee getEmp(@PathVariable("id") Integer id){
            Employee emp = employeeMapper.getEmpById(id);
            return emp;
        }

![20190314145548661.png][]

[20190314144849949.png]: /images/20220308/ecb0b906da59416ea9eeb1880487ceb8.png
[http_www.mybatis.org_mybatis-3]: http://www.mybatis.org/mybatis-3/
[20190314145548661.png]: /images/20220308/109fd4aa8b1c45cb9b9b657e98beb0e2.png