java怎么實(shí)現(xiàn)es分頁查詢

在Java中，可以使用Elasticsearch的Java客戶端庫來實(shí)現(xiàn)ES分頁查詢。下面是一個簡單的示例代碼：

import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.sort.SortBuilders;
import org.elasticsearch.search.sort.SortOrder;

public class ElasticsearchPaginationExample {
    private static final String INDEX_NAME = "your_index_name";
    private static final int PAGE_SIZE = 10;

    public static void main(String[] args) {
        try (RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder("localhost:9200"))) {

            int pageNumber = 1;
            SearchRequest searchRequest = new SearchRequest(INDEX_NAME);
            SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();

            // 設(shè)置分頁
            searchSourceBuilder.from((pageNumber - 1) * PAGE_SIZE);
            searchSourceBuilder.size(PAGE_SIZE);

            // 設(shè)置排序
            searchSourceBuilder.sort(SortBuilders.fieldSort("your_field_name").order(SortOrder.ASC));

            // 設(shè)置查詢條件
            searchSourceBuilder.query(QueryBuilders.matchAllQuery());

            searchRequest.source(searchSourceBuilder);

            SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);

            // 處理搜索結(jié)果
            // searchResponse.getHits().getHits() 返回的是一個 SearchHit[] 數(shù)組，包含了查詢到的文檔
            // 可以根據(jù)需要進(jìn)行處理
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

在上述代碼中，首先創(chuàng)建了一個RestHighLevelClient對象來連接到Elasticsearch服務(wù)器。然后，使用SearchRequest創(chuàng)建一個查詢請求，并使用SearchSourceBuilder來設(shè)置分頁、排序和查詢條件。最后，使用client.search()方法執(zhí)行查詢，并處理返回的SearchResponse對象中的結(jié)果。