public class IDCard implements Serializable {
 private int id; // 主鍵
 private String cardCode; // 身份證編號
 private String carAddress; // 身份證地址
 //構(gòu)造函數(shù)及Getter/Setter/toString...
}

public class Person implements Serializable {
 private int id; // 主鍵
 private String name; // 姓名
 private String sex; // 性別
 private IDCard iDCard; //身份證對象，人和身份證一對一關(guān)系
 //構(gòu)造函數(shù)及Getter/Setter/toString...
}

<mapper namespace="pri.xiaoyang.otot.mapper.IDCardMapper">
　　<!-- 根據(jù)主鍵查詢IDCard信息，封裝為IDCard對象并返回 -->
 <select id="selectIDCardById" pamaeterType="int" resultType="pri.xiaoyang.otot.pojo.IDCard">
  select * from idcard where id = #{id}
 </select>
</mapper>

<mapper namespace="pri.xiaoyang.otot.mapper.PersonMapper">
 <!-- 根據(jù)person主鍵查詢Person信息，封裝為Person對象并返回 -->
 <select id="selectPersonById" pamaeterType="int" resultMap="PersonMapper">
  select * from person where id = #{id}
 </select>
 
 <!-- 映射Person對象的resultMap -->
 <resultMap type="pri.xiaoyang.otot.pojo.Person" id="PersonMapper">
  <id property="id" column="id" />
  <result property="name" column="name" />
  <result property="sex" column="sex" />
  <!-- 一對一關(guān)聯(lián)映射：association -->
  <association property="iDCard" column="card_id" 
   select="pri.xiaoyang.otot.mapper.IDCardMapper.selectIDCardById"
   javaType="pri.xiaoyang.otot.pojo.IDCard"/>
 </resultMap >
</mapper>