单个属性去重

ArrayList<BookInfoVo> distinctLiost = list.stream()
                .collect(
                        Collectors.collectingAndThen(
                                Collectors.toCollection(() -> new TreeSet<>(Comparator.comparingLong(BookInfoVo::getRecordId))), ArrayList::new));

多个属性去重

ArrayList<BookInfoVo> distinctLiost = list.stream()
                .collect(
                        Collectors.collectingAndThen(
                                Collectors.toCollection(() -> new TreeSet<>(Comparator.comparing(
                       o -> o.getName() + ";" + o.getAuthor()))), ArrayList::new));