Springboot整合mybatis

导入依赖：

<!--        mybatis-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>

yml配置：

#mybatis配置
mybatis:
  mapperLocations: classpath*:mapper/*.xml

mapper.java

package com.yunnuo.demo.mapper;


import com.yunnuo.demo.entity.User;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Component;

import java.util.List;

@Mapper
@Component
public interface UserMapper {

    int insert(User user);

    User selectById(Integer id);

    List<User> selectAll();

    int remove(Integer id);

    int update(User user);

}

mapper.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.yunnuo.demo.mapper.UserMapper">
    <resultMap id="userMap" type="com.yunnuo.demo.entity.User">
        <result property="id" column="id"/>
        <result property="name" column="name"/>
        <result property="sex" column="sex"/>
        <result property="age" column="age"/>
    </resultMap>

    <insert id="insert" parameterType="com.yunnuo.demo.entity.User">
      insert into user (
             name,
             sex,
             age
              )
      VALUES (
            #{name},
            #{sex},
            #{age}
          )
    </insert>
    <update id="update" parameterType="com.yunnuo.demo.entity.User">
        update user
        set name=#{name},
            sex=#{sex},
            age = #{age}
        where id=#{id}
    </update>

    <delete id="remove">
        DELETE FROM user
        WHERE id = #{id}
        <!--IN
        <foreach collection="ids" index="index" item="item" open="(" separator="," close=")">
            #{item}
        </foreach>-->
    </delete>

    <select id="selectById" parameterType="java.lang.Integer" resultMap="userMap">
        select id, name, sex, age
        from user
        where id = #{id}
    </select>

    <select id="selectAll" resultMap="userMap">
        select id,name,sex,age
        from user
    </select>

</mapper>