결과값이 하나일 경우
<select id="selectUsers" parameterType="int" resultType="java.lang.String">
select username
from some_table
where id = #{id}
</select>
결과값이 여러 개일 경우 - HashMap
<select id="selectUsers" parameterType="int" resultType="java.util.HashMap">
select id, username, hashedPassword
from some_table
where id = #{id}
</select>
결과값이 여러 개일 경우 - Plain Object
<select id="selectUsers" parameterType="int" resultType="com.someapp.model.User">
select id, username, hashedPassword
from some_table
where id = #{id}
</select>
TypeAliases
<!-- In Config XML file -->
<typeAlias type="com.someapp.model.User" alias="User"/>
<!-- In SQL Mapping XML file -->
<select id="selectUsers" parameterType="int" resultType="User">
select id, username, hashedPassword
from some_table
where id = #{id}
</select>
