SpringBoot整合Mybatis

整合MyBatis

官方文档：http://mybatis.org/spring-boot-starter/mybatis-spring-boot-autoconfigure/

Maven仓库地址：https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter/2.1.1

整合测试

1、导入 MyBatis 所需要的依赖

<!--这个整合依赖包不是以spring-boot-starter开头的,所以它不是spring官方的-->
<!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter -->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.2.0</version>
</dependency>

2、配置数据库连接信息以及整合mybatis的相关信息

spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.url=jdbc:mysql://localhost:3306/mybatis?useUnicode=true&serverTimezone=UTC&characterEncoding=utf-8
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver


#整合Mybatis
mybatis.type-aliases-package=com.kuang.pojo
mybatis.mapper-locations=classpath:mybatis/mapper/*.xml

server.port=8081

3、测试数据库是否连接成功！

4、创建实体类，导入 Lombok！

user.java

package com.kuang.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {

    private int id;
    private String name;
    private String pwd;
}

5、创建mapper目录以及对应的 Mapper 接口

UserMapper.java

//这个mapper注解表示了这是一个mybatis的mapper类
@Mapper
@Repository
public interface UserMapper {

    List<User> queryUserList();

    User queryUserById(int id);

    int addUser(User user);

    int updateUser(User user);

    int deleteUser(int id);

}

6、对应的Mapper映射文件(放在resources/mybatis/mapper目录下)

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.kuang.mapper.UserMapper">

    <select id="queryUserList" resultType="User">
        select * from user 
    </select>
    
    <select id="selectUserById" resultType="User">
        select * from user where id=#{id}
    </select>

    <insert id="addUser" parameterType="User">
        insert into user(id,name,pwd) values(#{id},#{name},#{pwd})
    </insert>

    <update id="updateUser" parameterType="User">
        update user set name=#{name},pwd={pwd} where id= #{id}
    </update>

    <delete id="deleteUser" parameterType="int">
        delete from user where id=#{id}
    </delete>

</mapper>

8、编写部门的 UserController进行测试！

@RestController
public class UserController {

    @Autowired
    private UserMapper userMapper;

    @GetMapping("/queryUserList")
    public List<User>  queryUserList(){
        List<User> userList = userMapper.queryUserList();
        for (User user : userList) {
            System.out.println(user);
        }
        return  userList;
    }

}

测试完成，搞定收工!此项目在springboot-05-mybatis中，之后会给出码云地址！