Result Maps collection already contains value for cn.itcast.ssm.mapper.CompetesMapperCustom.baseMap
在使用ssm时出现的错误:
org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. Cause: java.lang.IllegalArgumentException: Result Maps collection already contains value for cn.itcast.ssm.mapper.CompetesMapperCustom.baseMap
原因是,在自己写的mapper.xml文件中具有相同id的不同select标签引用了同一个resultMap
例如:
<select id="selectCompetesForInit" parameterType="CompetesQueryVo" resultMap="baseMap">
<include refid="baseSql"/>
group by c.compete_id limit #{jumpCount},#{selectCount}
</select>
<select id="selectCompetesForInit" parameterType="CompetesQueryVo" resultMap="baseMap">
<include refid="baseSql"/>
<where>
<if test="competeTitle != null">
and compete_title like #{competeTitle}
</if>
</where>
group by c.compete_id limit #{jumpCount},#{selectCount}
</select>
以上两个select具有相同的id(select里面的内容请自动忽略),其实不应该存在相同id的select标签,因为我太懒了(懒就懒呗,还不仔细,emmmmmmm...),复制粘贴代码以后忘记修改id了,导致出现了这个错误!
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