<?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>  
  <!--解决，查询返回结果含null没有对应字段值问题-->  
  <setting name="callSettersOnNulls" value="true"/>  
  </settings>  
</configuration> 