public HttpResult<ESResult> inserSql(int pageNum,int pageSize) throws IOException {
        RestClient restClient = RestClient.builder(
                new HttpHost("127.0.0.1", 9200, "http")).build();

        /*高level的客户端*/
        RestHighLevelClient client = new RestHighLevelClient(restClient);
        String index = "index_name";
        String docType= "document_type";
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        pageSize = pageSize >= 1000 ? 1000 : pageSize;
        pageSize = pageSize <= 0 ? 15 : pageSize;
        //其实位置
        sourceBuilder.from(pageNum);
        //每页数量
        sourceBuilder.size(pageSize);
        sourceBuilder.sort(new FieldSortBuilder("_uid").order(SortOrder.DESC));

        SearchRequest rq = new SearchRequest();
        //索引
        rq.indices(index);
        rq.types(docType);
        //各种组合条件
        rq.source(sourceBuilder);
        //请求
        SearchResponse rp = client.search(rq);
        ESResult esResult = new ESResult();
        esResult.setSearchResponse(rp);
        esResult.setSearchRequest(rq);
        return HttpResult.ok(esResult);
    }