mybatis结果集为map时 value为空显示key

ruoyi-admin/src/main/resources/mybatis/mybatis-config.xml

@@ -14,7 +14,9 @@ PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
 		<!-- 指定 MyBatis 所用日志的具体实现 -->
         <setting name="logImpl"                  value="SLF4J"  />
         <!-- 使用驼峰命名法转换字段 -->
-		 <setting name="mapUnderscoreToCamelCase" value="true"/>
+        <setting name="mapUnderscoreToCamelCase" value="true"/>
+        <!-- value为空时显示key -->
+        <setting name="callSettersOnNulls" value="true" />
 	</settings>
     <objectWrapperFactory type="com.ruoyi.common.utils.MapWrapperFactory"/>