参与：https://www.cnblogs.com/jpfss/p/6775199.html
方法二： 使用Mybatis config配置
创建configuration.xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD SQL MAP Config 3.1//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <settings> <setting name="callSettersOnNulls" value="true"/> </settings> </configuration> 配置Mybatis的SqlSessionFactoryBean <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="configLocation" value="classpath:configuration.xml" /> <property name="mapperLocations" value="classpath:/META-INF/spring/mybatis/modelMap/*.xml" /> </bean> 在这种配置中，age将以null值映射到map中。
