resultMap

<resultMap>

<construtor>

<idArg/>

<arg/>

</constructor>

<id/>

<result/>

<association/> 级联相关一对一

<collection/> 级联相关一对多

<discriminator> <case> </discriminator>级联相关鉴别器

</resultMap>

<resultMap typr="com.xu.pojo.Role" id="roleMap">

<construtor>

<idArg column="id" javaType="int">

<arg column="role_name" javaType="string"/>

</construtor>

<id property="id" column="id"/>

<result property="roleName" column="role_name"/>

<result property ="note "  column="note">

<./resultMap>