ibatis开发过程中小计

在BeanA中引用BeanB对象

public class A{ private String userId; private B b; public String getUserId() {        return userId;    } public void setUserId(String userId) {        this.userId= userId;    } public B getB() {        return b;    } public void setA(B b) {        this.b= b;    }}public class B{private String userId;private String name;private String tel;.....set \get方法}A_SqlMap.xml<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE sqlMap PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN" "http://ibatis.apache.org/dtd/sql-map-2.dtd" ><sqlMap namespace="A" >  <resultMap id="ibatorgenerated_BaseResultMap" class="portalcore.dao.vo.TUsers" >    <!--      WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.    -->    <result column="A" property="userId" jdbcType="VARCHAR" />    <result property="b" column="USER_ID"            select="b.selectById" />  </resultMap>  省略</sqlMap>B_SqlMap.xml<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE sqlMap PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN" "http://ibatis.apache.org/dtd/sql-map-2.dtd" ><sqlMap namespace="T_TERMINAL" >  <resultMap id="ibatorgenerated_BaseResultMap" class="portalcore.dao.vo.TTerminal" >    <!--      WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.    -->    <result column="USER_ID" property="userId" jdbcType="VARCHAR" />    <result column="NAME" property="name" jdbcType="VARCHAR" />    <result column="TEL" property="tel" jdbcType="VARCHAR" />  </resultMap>    <!--自己定义的-->    <select id="selectById" resultMap="ibatorgenerated_BaseResultMap" parameterClass="String" >    <!--      WARNING - This element is automatically generated by Apache iBATIS ibator, do not modify.    -->    select USER_ID,NAME,TEL    from B where  USER_ID=#userId:VARCHAR#  </select></sqlMap>在查询A 的同时也查询了B