与初探中大部分一样，只是修改resultMap中的相关信息。
代码语言：javascript复制 <resultMap type="com.gong.mybatis.bean.Employee" id="MySimpleMap2">
<id column="id" property="id"/>
<result column="last_name" property="lastName"/>
<result column="gender" property="gender"/>
<result column="email" property="email"/>
<association property="dept" javaType="com.gong.mybatis.bean.Department">
<id column="did" property="id"/>
<result column="dept_name" property="deptName"/>
</association>
</resultMap>
<select id="getEmpAndDept" resultMap="MySimpleMap2">
SELECT e.id,e.last_name,e.gender,e.email,d.dept_name,d.id did
FROM tbl_employee e,tbl_department d
WHERE e.d_id = d.id and e.id=#{id};
</select>说明：在resultMap中使用association标签，property属性对应着Employee中的成员属性的名称，javaType对应着该成员属性的类型，子标签id标识tbl_department中的主键，因为我们在select标签中将d.id取别名did，所以将did映射给Department中的id属性，然后通过result标签将普通的字段映射给Department中的deptName属性。
结果：
DEBUG 01-20 12:42:43,808 ==> Preparing: SELECT e.id,e.last_name,e.gender,e.email,d.dept_name,d.id did FROM tbl_employee e,tbl_department d WHERE e.d_id = d.id and e.id=?; (BaseJdbcLogger.java:145) DEBUG 01-20 12:42:43,887 ==> Parameters: 3(Integer) (BaseJdbcLogger.java:145) DEBUG 01-20 12:42:43,926 <== Total: 1 (BaseJdbcLogger.java:145) Employee [id=3, lastName=小红, gender=0, email=xiaohong@qq.com, dept=Department [id=1, deptName=开发部]] Department [id=1, deptName=开发部]
说明这种方法也是可以的。
