mybatis中使用动态sql，报错： invalid comparison: java.util.ArrayList and java.lang.String] with root cause
是由于 list != ' ' 导致的,引起了集合与string类型的比较
<if test="lsit != null and list != ''">
B.COMMID IN (
<foreach collection="list" item="commId" index="index" separator=",">
#{commId,jdbcType=VARCHAR}
</foreach>
)
</if>
修改为
<if test="lsit != null and list.size > 0">
B.COMMID IN (
<foreach collection="list" item="commId" index="index" separator=",">
#{commId,jdbcType=VARCHAR}
</foreach>
)
</if>