文章目录
介绍
Elasticsearch 是一个分布式、RESTful 风格的搜索和数据分析引擎，它能够快速地存储、搜索和分析大量的数据。Elasticsearch 常用于全文搜索、结构化搜索、日志分析、实时应用监控等场景。
在springboot项目集成ES
操作步骤
1.创建boot项目
引入入Web(Spring Web)NoSQl(Spring Data Elasticsearch(Access+Driver))
2.引入依赖
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-high-level-client</artifactId>
<version>7.6.1</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.83</version> <!-- 确认版本 -->
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
3.编写配置类
import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class ElasticSearchConfig {
@Bean
public RestHighLevelClient restHighLevelClient() {
RestHighLevelClient client = new RestHighLevelClient(
RestClient.builder(
new HttpHost("127.0.0.1", 9200, "http")));
return client;
}
}
4.启动ES，编写测试类
创建索引
@Autowired
@Qualifier("restHighLevelClient")
private RestHighLevelClient client;
/**
* 创建索引
*/
@Test
void testCreateIndex() throws IOException {
CreateIndexRequest request = new CreateIndexRequest("zyy_index");
CreateIndexResponse createIndexResponse = client.indices().create(request, RequestOptions.DEFAULT);
// 查看是否创建成功
boolean acknowledged = createIndexResponse.isAcknowledged();
System.out.println(acknowledged);
client.close();
}
查询索引
@Test
void testGetIndex() throws IOException {
GetIndexRequest request = new GetIndexRequest("zyy_index");
// 索引是否存在
boolean exists = client.indices().exists(request, RequestOptions.DEFAULT);
System.out.println(exists);
client.close();
}
删除索引
@Test
void testDeleteIndex() throws IOException {
DeleteIndexRequest request = new DeleteIndexRequest("zyy_index");
AcknowledgedResponse delete = client.indices().delete(request, RequestOptions.DEFAULT);
// 是否删除成功
boolean acknowledged = delete.isAcknowledged();
System.out.println(acknowledged);
client.close();
}
文档的添加
@Test
void testAddDoc() throws IOException {
User user = new User("zyy", 18);
IndexRequest indexRequest = new IndexRequest("zyy_index");
//类似PUT /zyy_index/_doc/1
indexRequest.id("1");
indexRequest.timeout(TimeValue.timeValueMillis(1000));
indexRequest.source(JSON.toJSONString(user), XContentType.JSON);
IndexResponse indexResponse = client.index(indexRequest, RequestOptions.DEFAULT);
// 返回状态CREATED
System.out.println(indexResponse.status());
//IndexResponse[index=zyy_index,type=_doc,id=1,version=1,result=created,seqNo=0,primaryTerm=1,shards={"total":2,"successful":1,"failed":0}]
System.out.println(indexResponse);
}
文档信息的获取
@Test
void testGetDoc() throws IOException {
// 类似GET /zyy_index/_doc/1
GetRequest request = new GetRequest("zyy_index", "1");
GetResponse response = client.get(request, RequestOptions.DEFAULT);
System.out.println(response.getSourceAsString());
}
文档的获取，并判断其是否存在
@Test
void testDocIsExits() throws IOException {
// 类似GET /zyy_index/_doc/1
GetRequest request = new GetRequest("zyy_index", "1");
// 不获取返回的 _source的上下文了
request.fetchSourceContext(new FetchSourceContext(false));
request.storedFields("_none_");
boolean exists = client.exists(request, RequestOptions.DEFAULT);
System.out.println(exists);
}
文档的更新
@Test
void testUpdateDoc() throws IOException {
User user = new User("zyy", 19);
UpdateRequest request = new UpdateRequest("zyy_index", "1");
request.doc(JSON.toJSONString(user), XContentType.JSON);
UpdateResponse response = client.update(request, RequestOptions.DEFAULT);
System.out.println(response.status());
System.out.println(response);
}
文档的删除
@Test
void testDeleteDoc() throws IOException {
DeleteRequest request = new DeleteRequest("zyy_index", "1");
DeleteResponse response = client.delete(request, RequestOptions.DEFAULT);
System.out.println(response.status());
System.out.println(response);
}
文档的查询
@Test
void testSearch() throws IOException {
//精确查询
TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("name", "zyy");
TermQueryBuilder termQueryBuilder1 = QueryBuilders.termQuery("_index", "zyy_index");
//匹配查询
// MatchQueryBuilder matchQueryBuilder = QueryBuilders.matchQuery("name", "zyy");
//构建查询条件
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
sourceBuilder.query(termQueryBuilder);
sourceBuilder.query(termQueryBuilder1);
//设置高亮
sourceBuilder.highlighter(new HighlightBuilder());
//设置分页
// sourceBuilder.from(0);
// sourceBuilder.size(10);
//请求对象
SearchRequest request = new SearchRequest();
request.source(sourceBuilder);
SearchResponse response = client.search(request, RequestOptions.DEFAULT);
//查看返回
SearchHits hits = response.getHits();
System.out.println(JSON.toJSONString(hits));
System.out.println("========================");
for (SearchHit hit : hits.getHits()) {
System.out.println(hit.getSourceAsMap());
}
System.out.println("========================");
}
批量添加数据
@Test
void testBulk() throws IOException {
List<User> userList = new ArrayList<>();
userList.add(new User("zyy1", 1));
userList.add(new User("zyy2", 2));
userList.add(new User("zyy3", 3));
userList.add(new User("zyy4", 4));
userList.add(new User("zyy5", 5));
userList.add(new User("zyy6", 6));
BulkRequest request = new BulkRequest();
request.timeout("10s");
for (int i = 0; i < userList.size(); i++) {
User user = userList.get(i);
IndexRequest indexRequest = new IndexRequest("zyy_index");
indexRequest.id("" + i);
indexRequest.source(JSON.toJSONString(user), XContentType.JSON);
request.add(indexRequest);
}
BulkResponse responses = client.bulk(request, RequestOptions.DEFAULT);
System.out.println(responses.status());
}