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Spring Boot與Elasticsearch的搜索優(yōu)化涉及多個(gè)方面,包括索引設(shè)計(jì)、查詢優(yōu)化、分片和副本管理等。以下是一些建議,幫助你優(yōu)化Spring Boot與Elasticsearch的搜索性能:
keyword
類(lèi)型存儲(chǔ)精確匹配的字符串?dāng)?shù)據(jù)。match
、term
、bool
等。對(duì)于精確匹配的場(chǎng)景,使用term
查詢;對(duì)于全文搜索的場(chǎng)景,使用match
查詢。from
和size
參數(shù)進(jìn)行分頁(yè)查詢,避免一次性返回大量數(shù)據(jù)導(dǎo)致內(nèi)存溢出。composite
聚合。_shrink
和_split
API動(dòng)態(tài)調(diào)整分片數(shù)量,以適應(yīng)數(shù)據(jù)量的變化。以下是一個(gè)簡(jiǎn)單的Spring Boot與Elasticsearch集成示例,展示了如何進(jìn)行基本的搜索操作:
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.data.elasticsearch.client.ClientConfiguration;
import org.springframework.data.elasticsearch.client.ElasticsearchClient;
import org.springframework.data.elasticsearch.client.RequestOptions;
import org.springframework.data.elasticsearch.client.core.ElasticsearchOperations;
import org.springframework.data.elasticsearch.client.core.ElasticsearchRestHighLevelClient;
import org.springframework.data.elasticsearch.core.query.IndexQuery;
import org.springframework.data.elasticsearch.core.query.IndexQueryBuilder;
import org.springframework.data.elasticsearch.core.query.SearchHit;
@SpringBootApplication
public class ElasticsearchSpringBootApp {
public static void main(String[] args) {
SpringApplication.run(ElasticsearchSpringBootApp.class, args);
}
@Bean
public ElasticsearchClient elasticsearchClient() {
ClientConfiguration clientConfiguration = ClientConfiguration.builder()
.connectedTo("localhost:9200")
.build();
return new ElasticsearchRestHighLevelClient(clientConfiguration);
}
@Bean
public ElasticsearchOperations elasticsearchOperations(ElasticsearchClient client) {
return new ElasticsearchRestHighLevelClient(client);
}
public void indexData() {
ElasticsearchOperations operations = elasticsearchOperations();
IndexQueryBuilder builder = new IndexQueryBuilder();
builder.withId("1")
.withObject(Map.of("title", "Spring Boot with Elasticsearch"));
IndexQuery indexQuery = builder.build();
operations.index(indexQuery, RequestOptions.DEFAULT);
}
public void searchData() {
ElasticsearchOperations operations = elasticsearchOperations();
SearchHit[] hits = operations.search(query -> query
.match("title", "Spring Boot"), RequestOptions.DEFAULT)
.getHits().getHits();
for (SearchHit hit : hits) {
System.out.println(hit.getSourceAsString());
}
}
}
在這個(gè)示例中,我們展示了如何使用Spring Data Elasticsearch進(jìn)行基本的索引和搜索操作。你可以根據(jù)實(shí)際需求進(jìn)一步優(yōu)化查詢邏輯和性能。
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