SpringBoot整合MyBatis(XML)

(1)、添加依赖

         <dependency>
             <groupId>org.mybatis.spring.boot</groupId>
             <artifactId>mybatis-spring-boot-starter</artifactId>
             <version>2.0.0</version>
         </dependency>

（2）、编写Mapper接口类

 package cn.coreqi.mapper;

 import cn.coreqi.entities.User;
 import org.apache.ibatis.annotations.Mapper;

 @Mapper
 public interface UserMapper {

     public User getUserById(Integer id);

     public int addUser(User user);

     public int modifyUser(User user);

     public int delUserById(Integer id);
 }

（3）、编写Mybatis配置文件

 <?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）、编写Mapper接口对应的Mapper配置文件

 <?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="cn.coreqi.mapper.UserMapper">
     <select id="getUserById" resultType="cn.coreqi.entities.User">
         select * from users where Id = #{id}
     </select>

     <insert id="addUser" useGeneratedKeys="true" keyProperty="Id">
         insert into users(UserName,PassWord,Enabled) values(#{UserName},#{PassWord},#{Enabled})
     </insert>

     <update id="modifyUser">
         update users set UserName = #{UserName},PassWord = #{PassWord},Enabled = #{Enabled} where Id = #{Id}
     </update>

     <delete id="delUserById">
         delete from users where Id = #{id}
     </delete>
 </mapper>

（5）、在配置文件中配置mybatis

 spring.datasource.username=root
 spring.datasource.password=123456
 spring.datasource.url=jdbc:mysql://localhost:3306/JdbcDemo?serverTimezone=UTC
 spring.datasource.driver-class-name=com.mysql.jdbc.Driver
 spring.datasource.type=com.alibaba.druid.pool.DruidDataSource

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