public interface IAccountDao {
    /**
     * 查詢所有賬戶，同時還要獲取到當前賬戶的所屬用戶信息
     * @return
     */
    List<Account> findAll();
    }

<resultMap id="accountUserMap" type="account">
        <id property="id" column="id"></id>
        <result property="uid" column="uid"></result>
        <result property="money" column="money"></result>
        <!-- 一對一的關系映射：配置封裝user的內容
        select屬性制定的內容：查詢用戶的唯一標識
         column屬性指定的內容：用戶根據id時，所需要的參數值的值-->
        <association property="user" column="uid" javaType="user" select="com.rpf.dao.IUserDao.findById"></association>
    </resultMap>
    <!-- 查詢所有 -->
    <select id="findAll" resultMap="accountUserMap">
        select * from account
    </select>

<!--加入settings-->
   <settings>
        <!--開啟Mybatis支持延遲加載-->
        <setting name="lazyLoadingEnabled" value="true"/>
        <setting name="aggressiveLazyLoading" value="false"></setting>
    </settings>

@Test
 public void testFindAll(){
        List<Account> accounts = accountDao.findAll();
    }

//user
  <resultMap id="userAccountMap" type="user">
        <id property="id" column="id"></id>
        <result property="username" column="username"></result>
        <result property="address" column="address"></result>
        <result property="sex" column="sex"></result>
        <result property="birthday" column="birthday"></result>
        <!-- 配置user對象中accounts集合的映射 -->
        <collection property="accounts" ofType="account" select="com.rpf.dao.AccountDao.findAccountByUid" column="id"></collection>
    </resultMap>
    <!-- 查詢所有 -->
    <select id="findAll" resultMap="userAccountMap">
        select * from user
    </select>
    <!-- 根據id查詢用戶 -->
    <select id="findById" parameterType="INT" resultType="user">
        select * from user where id = #{uid}
    </select>

<!-- 根據用戶id查詢賬戶列表 account -->
    <select id="findAccountByUid" resultType="account">
        select * from account where uid=#{uid}
    </select>

  @Test
    public void testFindAll(){
        List<User> users = userDao.findAll();
    }