1、在mybatis-config.xml文件中配置setting属性
<settings>
<setting name="callSettersOnNulls" value="true"/>
</settings>
2、需要在spring和mybatis的配置文件(这里是spring-mybatis.xml)SqlSessionFactoryBean配置property
<bean id="saasSqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property ... />
<!-- 引入mybatis-config.xml,让spring加载 -->
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
</bean>