import org.apache.ibatis.annotations.*; import java.util.List; @Mapper public interface MenuMapper {
      @Select("select * from menu where parentid=0")     @Results(id="tree",value = {
              @Result(property = "id",column = "id"),             @Result(property = "name",column = "name"),             @Result(property = "parentId",column = "parentId"),             @Result(property = "children",column = "id",many = @Many(select = "getTreeByParentId")),     })     List
    
      getTreeList();     @Select("select * from menu where parentId = #{parentId}")     @ResultMap("tree")     List
     
       getTreeByParentId(int parentId); }