mybatis返回數據類型為map，值為null的key沒返回

創建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>  
    	<!-- 當返回數據類型為map，設置callSettersOnNulls會把值為null的key也返回 -->
        <setting name="callSettersOnNulls" value="true"/>  
    </settings> 
</configuration>

 在配置數據源的配置文件中，配置Mybatis的SqlSessionFactoryBean

 

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="configLocation" value="classpath:/META-INF/spring/mybatis-config.xml" />
    <property name="mapperLocations">
	<array>
	　　<value>classpath*:/yunnex/saofu/shop/beibao/mapper/*.xml</value>
	</array>
　　</property>
</bean>

 

 重新啟動即可