Specification排序orderby

废话不多说直接贴代码

        Specification<Course> sf = new Specification<Course>() {

            @Override

            public Predicate toPredicate(Root<Course> root, CriteriaQuery<?> criteriaQuery, CriteriaBuilder criteriaBuilder) {

                List<Predicate> predicateList = Lists.newArrayList();

                //isDelete

                Predicate isDeletePredicate = criteriaBuilder.equal(root.get("isDelete"), Constant.NOT_DELETE);

                predicateList.add(isDeletePredicate);

                //isShelves

                Predicate isShelvesPredicate = criteriaBuilder.equal(root.get("isShelves"),Constant.COURSE_SHELVES_YES);

                predicateList.add(isShelvesPredicate);

                //categoryId

                if(categoryId!=null){

                    Predicate predicate = criteriaBuilder.equal(root.get("category").get("id"), categoryId);

                    predicateList.add(predicate);

                }

                //isRecommend

                if(isRecommend!=null){

                    Predicate predicate = criteriaBuilder.equal(root.get("isRecommend"), isRecommend);

                    predicateList.add(predicate);

                }

                /**

                 * order By

                 */

                Order weightOrder = criteriaBuilder.desc(root.get("weight"));

                Order createDateOrder = criteriaBuilder.desc(root.get("createDate"));

                return  criteriaQuery.orderBy(weightOrder, createDateOrder).where(predicateList.toArray(new Predicate[predicateList.size()])).getRestriction();

            }

        };