public void scroll(){RestHighLevelClient client = elasticClient.getRestHighLevelClient();//初始化scrollfinal Scroll scroll = new Scroll(TimeValue.timeValueMinutes(1L)); //设定滚动时间间隔SearchRequest searchRequest = new SearchRequest();searchRequest.scroll(scroll);SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();searchSourceBuilder.query(matchAllQuery());searchSourceBuilder.size(5); //设定每次返回多少条数据
        searchRequest.source(searchSourceBuilder);SearchResponse searchResponse = null;try {searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);} catch (IOException e) {e.printStackTrace();}String scrollId = searchResponse.getScrollId();SearchHit[] searchHits = searchResponse.getHits().getHits();System.out.println("-----首页-----");for (SearchHit searchHit : searchHits) {System.out.println(searchHit.getSourceAsString());}//遍历搜索命中的数据，直到没有数据while (searchHits != null && searchHits.length > 0) {SearchScrollRequest scrollRequest = new SearchScrollRequest(scrollId);scrollRequest.scroll(scroll);try {searchResponse = client.scroll(scrollRequest, RequestOptions.DEFAULT);} catch (IOException e) {e.printStackTrace();}scrollId = searchResponse.getScrollId();searchHits = searchResponse.getHits().getHits();if (searchHits != null && searchHits.length > 0) {System.out.println("-----下一页-----");for (SearchHit searchHit : searchHits) {System.out.println(searchHit.getSourceAsString());}}}//清除滚屏ClearScrollRequest clearScrollRequest = new ClearScrollRequest();clearScrollRequest.addScrollId(scrollId);//也可以选择setScrollIds()将多个scrollId一起使用ClearScrollResponse clearScrollResponse = null;try {clearScrollResponse = client.clearScroll(clearScrollRequest,RequestOptions.DEFAULT);} catch (IOException e) {e.printStackTrace();}boolean succeeded = clearScrollResponse.isSucceeded();System.out.println("succeeded:" + succeeded);}