MyBatis--------查询参数携带集合

一、携带参数

       Java的查询参数里携带了一个集合。

@Data
public class TeacherParam {

    private List<Long> teacherIds;
}

        这个参数作为查询Mapper的参数。

@Repository
@Mapper
public interface ClassRoomMapper {

    List<Teacher> queryTeacher(TeacherParam teacherParam);
}

        以下是调用这个内部集合的例子。

<select id="queryTeacher" resultType="com.tyzhou.stu.model.Teacher">
        select
            id id,
            name name
        from
            m_teacher
        where
        1=1
        <if test="teacherIds != null and teacherIds.size()>0">
            and id in
            <foreach item="tId" index="index" 
                                 collection="teacherIds" open="(" close=")" separator=",">
                #{tId}
            </foreach>
        </if>
    </select>

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