java 整合elasticsearch 实现简单得查询
时间: 2023-05-24 14:01:21 浏览: 327
可以使用 Java 的 Elasticsearch 客户端 API 进行索引的创建、数据的插入、查询的操作。以下是一个简单的查询示例:
TransportClient client = new PreBuiltTransportClient(Settings.EMPTY)
.addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("localhost"), 9300));
SearchResponse response = client.prepareSearch("index")
.setTypes("type")
.setQuery(QueryBuilders.matchQuery("field", "value"))
.setSize(10)
.execute()
.actionGet();
for (SearchHit hit : response.getHits().getHits()) {
System.out.println(hit.getId());
}
其中,"index" 是要查询的索引名,"type" 是需要查询的文档类型,"field" 和 "value" 分别是要查询的字段名和字段值,"."setSize(10)" 设置了查询结果的最大条数为 10。
相关问题
springboot整合es实现模糊查询java代码
好的,这是一个示例代码:
```java
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.QueryStringQueryBuilder;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
import org.springframework.data.elasticsearch.core.query.NativeSearchQuery;
import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
import org.springframework.stereotype.Service;
@Service
public class ElasticsearchService {
@Autowired
private ElasticsearchRestTemplate elasticsearchRestTemplate;
public List<YourEntity> search(String keyword) {
QueryStringQueryBuilder queryStringQueryBuilder = QueryBuilders.queryStringQuery(keyword);
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.query(queryStringQueryBuilder);
NativeSearchQuery nativeSearchQuery = new NativeSearchQueryBuilder()
.withQuery(queryStringQueryBuilder)
.build();
return elasticsearchRestTemplate.queryForList(nativeSearchQuery, YourEntity.class);
}
}
```
其中,`YourEntity` 是你要查询的实体类,`keyword` 是你要查询的关键词。这个示例代码使用了 `ElasticsearchRestTemplate` 来操作 Elasticsearch,使用了 `QueryBuilders.queryStringQuery()` 方法来实现模糊查询。
java 整合elasticsearch 7.10.1
好的,我可以为您提供一些关于 Java 整合 Elasticsearch 7.10.1 的基本步骤,具体如下:
1. 首先,您需要在 Maven 或 Gradle 中添加 Elasticsearch Java 客户端的依赖,例如:
Maven:
```xml
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-high-level-client</artifactId>
<version>7.10.1</version>
</dependency>
```
Gradle:
```gradle
dependencies {
implementation 'org.elasticsearch.client:elasticsearch-rest-high-level-client:7.10.1'
}
```
2. 创建一个 Elasticsearch 客户端,例如:
```java
RestHighLevelClient client = new RestHighLevelClient(
RestClient.builder(
new HttpHost("localhost", 9200, "http")));
```
3. 使用客户端执行 Elasticsearch 操作,例如:
```java
// 创建索引
CreateIndexRequest request = new CreateIndexRequest("my_index");
client.indices().create(request, RequestOptions.DEFAULT);
// 添加文档
IndexRequest request = new IndexRequest("my_index");
request.id("1");
request.source("field1", "value1");
client.index(request, RequestOptions.DEFAULT);
// 搜索文档
SearchRequest request = new SearchRequest("my_index");
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
sourceBuilder.query(QueryBuilders.matchQuery("field1", "value1"));
request.source(sourceBuilder);
SearchResponse response = client.search(request, RequestOptions.DEFAULT);
```
以上就是 Java 整合 Elasticsearch 7.10.1 的基本步骤,您可以根据自己的需求进行相应的操作。
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