SpringBoot开发之整合Mybatis详解

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.4</version>
        </dependency>

//  MyBatis配置项绑定类。
@EnableConfigurationProperties(MybatisProperties.class)
@AutoConfigureAfter({ DataSourceAutoConfiguration.class, MybatisLanguageDriverAutoConfiguration.class })
public class MybatisAutoConfiguration{}
@ConfigurationProperties(prefix = "mybatis")
public class MybatisProperties

# 配置mybatis规则
mybatis:
  config-location: classpath:mybatis/mybatis-config.xml  # 全局配置文件位置
  mapper-locations: classpath:mybatis/mapper/*.xml  # sql映射文件位置
# Mapper接口--->绑定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.cf.admin.mapper.AccountMapper">
<!--    public Account getAcct(Long id); -->
    <select id="getAcct" resultType="com.cf.admin.bean.Account">
        select * from  t_user where  id=#{id}
    </select>
</mapper>

# 配置mybatis规则
mybatis:
#  config-location: classpath:mybatis/mybatis-config.xml
  mapper-locations: classpath:mybatis/mapper/*.xml
  configuration:
    map-underscore-to-camel-case: true
# 可以不写全局；配置文件，所有全局配置文件的配置都放在configuration配置项中即可

@Mapper
public interface CityMapper {
    @Select("select * from t_user where id=#{id}")
    public User getById(Long id);
}

@Mapper
public interface CityMapper {
    @Select("select * from t_user where id=#{id}")
    public User getById(Long id);
}

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.1</version>
        </dependency>