es java scroll滚动查询

/**
     * 滚动查询
     */
    @Test
    public void scroll() {
        SearchResponse response = client.prepareSearch("twitter").setTypes("tweet")
                .addSort(SortBuilders.fieldSort("_doc"))
                .setSize(10).setScroll(new TimeValue(2000)).execute()
                .actionGet();
        //获取总数量
        long totalCount = response.getHits().getTotalHits();
        int page = (int) totalCount / 10;//计算总页数,每次搜索数量为分片数*设置的size大小
        System.out.println("totalCount:" + totalCount);
        scrollOutput(response);
        for (int i = 0; i < page; i++) {
            //再次发送请求,并使用上次搜索结果的ScrollId
            response = client.prepareSearchScroll(response.getScrollId())
                    .setScroll(new TimeValue(20000)).execute()
                     .actionGet();
            scrollOutput(response);
        }
    }

 public static void scrollOutput(SearchResponse response){
        SearchHits hits = response.getHits();
        System.out.println("-----------begin------------");
        for (int j=0;j<hits.getHits().length;j++) {
            try {
                String id = hits.getHits()[j].getId();
                System.out.println("第" + k + "条数据:" + id);
            } catch (Exception e) {
                e.printStackTrace();
            }
            k++;
        }
        System.out.println("-----------end------------");
    }