grails查询指定列，且以map的形式返回结果集，有两种方式：

1、select new map(id as id,name as name) from User

2、User.createCriteria().list{

            projections{

                property("id","aliasId")

                property("name","aliasName")

            }            

    setResultTransformer(CriteriaSpecification.ALIAS_TO_ENTITY_MAP)

      }