MyBatis中collection (一对一，一对多)

MyBatis学习：http://www.mybatis.org/mybatis-3/zh/index.html

大对象InsuranceDetailsVO:

com.quicksure.mobile.entity.InsuranceDetailsVO
 
public class InsuranceDetailsVO {
private String orderno;
@Resource
private Baseinfor baseinfor;
@Resource
private Coverageinfor coverageinfor;
 
private List<Coverageinfor> coverageinfors;  //险种的集合
 
........其它无关实体类和get、set方法省略
}

实体类Baseinfor:

com.quicksure.mobile.entity.Baseinfor
 
public class Baseinfor {
private String orderno;// 订单号
 
......一些基本的字段和get、set方法
}    

对应的mapper：

联合查询，一对一
<mapper namespace="com.quicksure.mobile.dao.VelicheBatchCheckMapper">
  <resultMap id="queryBatchPolicy" type="com.quicksure.mobile.entity.InsuranceDetailsVO">
      <id column="orderNo" jdbcType="VARCHAR" property="orderno" />
      <collection property="baseinfor" ofType="com.quicksure.mobile.entity.Baseinfor" resultMap="baseinforResult"></collection>
  </resultMap>
  
联合查询，一对多
  <resultMap id="queryBatchPolicy1" type="com.quicksure.mobile.entity.InsuranceDetailsVO">
      <id column="orderNo" jdbcType="VARCHAR" property="orderno" />
      <collection property="baseinfor" ofType="com.quicksure.mobile.entity.Baseinfor" resultMap="baseinforResult"></collection>
      <collection property="coverageinfors" ofType="com.quicksure.mobile.entity.Coverageinfor" resultMap="coverageinforResult"></collection>
  </resultMap>
  <resultMap id="baseinforResult" type="com.quicksure.mobile.entity.Baseinfor">
　　......基本字段映射
  </resultMap>
 
  <resultMap id="coverageinforResult" type="com.quicksure.mobile.entity.Coverageinfor">
　　......基本字段映射
  </resultMap>
 
  <!-- CSR导出excel时查询对应的数据 -->
  <select id="CSRExportExcel" parameterType="java.util.Map" resultMap="queryBatchPolicy1">
      select
         baseinfor.orderNo,baseinfor.syapplicationNo,baseinfor.jqapplicationNo,baseinfor.sypolicyNo,baseinfor.jqpolicyNo,
         baseinfor.deptAddress,vhinfor.drvOwner,vhinfor.lcnNo,baseinfor.sypolicyStartDate,baseinfor.jqpolicyStartDate,
         baseinfor.orderstate,baseinfor.syPremium,baseinfor.jqPremium,baseinfor.taxPremium,baseinfor.totalPremium,
         baseinfor.updateTime,baseinfor.paymentMethod,baseinfor.jqpolicyNo,baseinfor.sypolicyNo,baseinfor.createTime,
         coverage.*
      from
        ludimb_baseinfor baseinfor
        LEFT JOIN ludimb_vhlinfor vhinfor on baseinfor.vhlinforId = vhinfor.vhiinforId
        LEFT JOIN ludimb_coverageinfor coverage on baseinfor.orderNo = coverage.baseinforOrderNo
    where 1=1
         <if test="deptcode!=null and deptcode!='' and deptcode!=1">
            and baseinfor.deptNo=#{deptcode}
          </if>
          <if test="orderNo!=null and orderNo!=''">
            and baseinfor.orderNo=#{orderNo}
          </if>
          <if test="drvowner!=null and drvowner!=''">
            and vhinfor.drvOwner=#{drvowner}
          </if>
          <if test="lcnNo!=null and lcnNo!=''">
            and vhinfor.lcnNo=#{lcnNo}
          </if>
          <choose>
              <when test="orderstate==1">
                  and baseinfor.orderstate in (30,40)
              </when>
              <when test="orderstate==2">
                  and baseinfor.orderstate in (50,60,70)
              </when>
              <when test="orderstate==3">
                  and baseinfor.orderstate in (10,20)
              </when>
              <when test="orderstate==4">
                  and baseinfor.orderstate = 80
              </when>
              <otherwise>
              </otherwise>
          </choose>
          <if test="createStartTime!=null and createStartTime!=''">
               <![CDATA[ and baseinfor.createTime >= #{createStartTime} ]]>
          </if>
          <if test="createEndTime!=null and createEndTime!=''">
              <![CDATA[ and baseinfor.createTime <= #{createEndTime} ]]>
          </if>
  </select>
<mapper>