mybaits 多个参数传入用＃{0,1,....}或者@Param注释

Dao层定义如下：

public interface CompanyMemberRelReadDao {

CompanyMemberRel getCompanyMemberRel(Integer companyId, Integer memberId);

｝

这样子的话，sql的配置如下：

<mapper namespace="com.tsb.dao.read.CompanyMemberRelReadDao">

<resultMap id="companyMemberRelResult" type="CompanyMemberRel">

</resultMap>

<select id="getCompanyMemberRel" resultMap="companyMemberRelResult">

select * from company_member_rel where companyId = #{companyId}

and memberId = #{memberId}

</select>

</mapper> 

这样mybaits是找不到 companyId,也就是识别不了 #{companyId}

写成如下才可以

<mapper namespace="com.tsb.dao.read.CompanyMemberRelReadDao">

<resultMap id="companyMemberRelResult" type="CompanyMemberRel">

</resultMap>

<select id="getCompanyMemberRel" resultMap="companyMemberRelResult">

select * from company_member_rel where companyId =#{0}

 and memberId = #{1}

</select>

</mapper> 

如果要写成第一种形式，那么dao层需要增加@Param

public interface CompanyMemberRelReadDao {

CompanyMemberRel getCompanyMemberRel(@Param("companyId") Integer companyId, @Param("memberId") Integer memberId);

}