Map和mybatis
Map中通过key查找value：
Map<String,String> map = new HashMap<>();
for(String key: map.keySet()){
String value = map.get(key);
System.err.println(key + value);
}
mybatis中*等价替换:
<sql id = "Base_Column_List">
id,name,nick_name, phone,age,gender,address,del_flag
</sql>
<select id = "selectByFlag" resultType = "com.brevity.pojo.UserInfo">
select
<include refid = "Base_Column_List" />
from user_info
where del_flag = #{DelFlag}
</select>