1、spring中@Param ( import org.springframework.data.repository.query.Param; )
int selectRoleCount(@Param("businessId") Integer businessId,@Param("memberId") Long memberId);
2、mybatis中param,( import org.apache.ibatis.annotations.Param )
int selectRoleCount(@Param("businessId") Integer businessId,@Param("memberId") Long memberId);
从方法传参上看,两者并没有区别,但是在实际使用中有区别
Spring中的@param在xml需要如下这样引用变量:
<select id="selectRoleCount" resultType="java.lang.Integer" >
select
count(tbm.id)
from t_business_member_relation tbm
where tbm.business_id = #{0,jdbcType=INTEGER}
and tbm.member_id = #{1,jdbcType=INTEGER}
and tbm.role_business_id is not null
</select>
//是根据参数的顺序来取值的,并且从0开始。
而在mybatis @param在xml中则是如下这样引用变量的
<select id="selectRoleCount" resultType="java.lang.Integer" >
select
count(tbm.id)
from t_business_member_relation tbm
where tbm.business_id = #{businessId,jdbcType=INTEGER}
and tbm.member_id = #{memberId,jdbcType=INTEGER}
and tbm.role_business_id is not null
</select>
//是通过参数名来引用的
如果Mapper.java文件中引用的是Spring的
org.springframework.data.repository.query.Param;
但是Mapper.xml中书写Sql使用的是mybatis 的用法,那么就会如下的错误
org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.binding.BindingException: Parameter 'businessId' not found. Available parameters are [1, 0, param1, param2]
标签:business,businessId,Param,tbm,mybatis,注解,id
From: https://www.cnblogs.com/zuitaiping/p/17101708.html