1.フィールドが少ない場合は、直接@Select( "select user_id as userId from users")
2.完全なソリューション
sqlSessionFactoryBeanNew配置中引入mybatis-config配置,然后在mybatis配置里配置自动驼峰为true
<!-- spring和MyBatis整合 -->
<bean id="sqlSessionFactoryBeanNew" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--打印sql-->
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
<!-- <property name="dataSource" ref="dynamicDataSource" /> -->
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="classpath:dcc/mapper/*.xml"></property>
</bean>
mybatis-config.xml
<?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>
<!-- 打印查询语句 -->
<setting name="logImpl" value="STDOUT_LOGGING" />
<!-- 自动驼峰 -->
<setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>
</configuration>