42-Springboot整合HignLevelClient----构建复杂检索

@Test
	void searchTest() throws IOException {
		SearchRequest searchRequest = new SearchRequest();
		//1、指定索引
		searchRequest.indices("bank");

		//2.1、指定检索条件
		SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
		sourceBuilder.query(QueryBuilders.termQuery("address", "mill"));
		//2.2、按照年龄分布进行聚合
		TermsAggregationBuilder ageAgg = AggregationBuilders.terms("ageAgg").field("age");
		sourceBuilder.aggregation(ageAgg);
		//2.3、计算平均薪资
		AvgAggregationBuilder balanceAvg = AggregationBuilders.avg("balanceAvg").field("balance");
		sourceBuilder.aggregation(balanceAvg);

		//3、添加检索条件
		searchRequest.source(sourceBuilder);

		//4、执行检索
		SearchResponse searchResponse = client.search(searchRequest, GulimallElasticsearchConfig.COMMON_OPTIONS);

		//5、打印检索结果
		System.out.println(searchResponse.toString());

		//6、分析检索结果
		SearchHits hits = searchResponse.getHits();
		SearchHit[] hits1 = hits.getHits();
		for (SearchHit hit : hits1) {
			String sourceAsString = hit.getSourceAsString();
			bankEntity bankEntity = JSON.parseObject(sourceAsString, bankEntity.class);//通过json工具类讲过json字符串转为对象
			System.out.println(bankEntity);
		}

		//7、打印聚合结果
		Aggregations aggregations = searchResponse.getAggregations();
		Terms ageAgg1 = aggregations.get("ageAgg");//这个是term聚合
		for (Terms.Bucket bucket : ageAgg1.getBuckets()) {
			System.out.println("年龄：" + bucket.getKey());
		}

		Avg balanceAvg1 = aggregations.get("balanceAvg");//这个是avg聚合
		System.out.println("平均薪资：" + balanceAvg1.getValue());
	}

	@Data
	static class bankEntity {
		private int account_number;
		private int balance;
		private String firstname;
		private String lastname;
		private int age;
		private String gender;
		private String address;
		private String employer;
		private String email;
		private String city;
		private String state;
	}