es随机查询

ch-dao/pom.xml

@@ -110,10 +110,11 @@
             <version>1.2.12</version>
         </dependency>
 
+
         <dependency>
             <groupId>co.elastic.clients</groupId>
             <artifactId>elasticsearch-java</artifactId>
-            <version>8.8.2</version>
+            <version>8.9.0</version>
         </dependency>
 
     </dependencies>

ch-dao/src/main/java/com/wwdz/ch/db/es/ItemEsDao.java

@@ -6,6 +6,7 @@ import co.elastic.clients.elasticsearch.core.*;
 import co.elastic.clients.elasticsearch.core.bulk.BulkOperation;
 import co.elastic.clients.elasticsearch.core.bulk.CreateOperation;
 import co.elastic.clients.elasticsearch.core.search.Hit;
+import co.elastic.clients.elasticsearch.core.search.ScoreMode;
 import com.wwdz.ch.db.bean.EsPageInfo;
 import com.wwdz.ch.db.bean.ItemOfEs;
 import com.wwdz.ch.db.domain.Item;
@@ -103,18 +104,15 @@ public class ItemEsDao {
 
                 build.must(matchQuery);
                 builder.from(from);
+                builder.query(build.build()._toQuery());
             } else {
-                    int num = 10000 - size;
                 Random random = new Random();
-                    from = random.nextInt(num);
-                    builder.from(from);
+                FunctionScoreQuery functionScoreQuery = FunctionScoreQuery.of(a->a.query(build.build()._toQuery()).boostMode(FunctionBoostMode.Replace)
+                        .functions(b->b.randomScore(s->s.field("id").seed(String.valueOf(random.nextDouble())))));
+                builder.query(functionScoreQuery._toQuery());
             }
-            builder.query(build.build()._toQuery());
             builder.size(size);
-           /* builder.sort(f -> f.field(o -> o.field("coin_id")
-                    .order(SortOrder.Desc)));*/
             SearchRequest searchRequest = builder.build();
-
             logger.info("查询语句 : {}", searchRequest.query());
             SearchResponse<ItemOfEs> searchResponse = elasticsearchClient.search(searchRequest, ItemOfEs.class);
             long total = searchResponse.hits().total().value();
@@ -127,7 +125,7 @@ public class ItemEsDao {
                 list.add(itemOfEs);
                 idList.add(itemOfEs.getId());
             }
-            logger.info("======== 随机返回的数据id : {}", idList);
+            logger.info("======== 返回的数据id : {}", idList);
             esPageInfo = EsPageInfo.of(total, list, page, size);
         } catch (Exception e) {
             logger.error("ES 查询商品列表 error : {}", e);