1 介绍
因为springboot整合es的问题，这里不使用 elasticsearch7.4.1版本，使用 elasticsearch6.4.3 版本。
具体的配置可参考博文 《ES elasticsearch的安装和配置》 ：https://blog.csdn.net/qq_15769939/article/details/114249211
elasticsearch6.4.3下载：https://download.csdn.net/download/qq_15769939/15655187
elasticsearch6.4.3中文分词器下载：https://download.csdn.net/download/qq_15769939/15655142
2 配置信息
2.1 pom文件
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
<!--<version>2.1.5.RELEASE</version>-->
<version>2.2.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
2.2 yml文件
spring:
# ES配置
data:
elasticsearch:
cluster-name: es6
cluster-nodes: 192.168.51.5:9300
2.3 解决Netty报错问题
import org.springframework.context.annotation.Configuration;
import javax.annotation.PostConstruct;
@Configuration
public class ESConfig {
/**
* 解决netty引起的issue
*/
@PostConstruct
void init() {
System.setProperty("es.set.netty.runtime.available.processors", "false");
}
}
3 API调用
import com.auskat.ESApplication;
import com.auskat.es.pojo.Stu;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.elasticsearch.search.sort.FieldSortBuilder;
import org.elasticsearch.search.sort.SortBuilder;
import org.elasticsearch.search.sort.SortOrder;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
import org.springframework.data.elasticsearch.core.SearchResultMapper;
import org.springframework.data.elasticsearch.core.aggregation.AggregatedPage;
import org.springframework.data.elasticsearch.core.aggregation.impl.AggregatedPageImpl;
import org.springframework.data.elasticsearch.core.query.*;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@RunWith(SpringRunner.class)
@SpringBootTest(classes = {
ESApplication.class})
public class ESTest {
@Autowired
private ElasticsearchTemplate esTemplate;
}
3.1 索引操作
/**
* 不建议使用 ElasticsearchTemplate 对索引进行管理（创建索引，更新映射，删除索引）
* 索引就像是数据库或者数据库中的表，我们平时是不会通过java代码频繁的去创建修改删除数据库的或者修改数据库的
* 我们只会针对数据做CRUD的操作
* 在ES中也是同理，我们尽量使用 ElasticsearchTemplate 对文档数据进行CRUD操作
* 1. 属性类型（FieldType） 类型不灵活
* 2. 主分片与副本分配数无法设置
*/
@Test
public void createIndexStu(){
Stu stu = new Stu();
stu.setStuId(1005L);
stu.setAge(55);
stu.setName("tom ccc");
stu.setMoney(38.8f);
stu.setSign("ccc is a new ccc");
stu.setDescription("this is a ccc , a real ccc");
IndexQuery indexQuery = new IndexQueryBuilder().withObject(stu).build();
esTemplate.index(indexQuery);
}
/**
* 删除索引
*/
@Test
public void deleteIndex(){
esTemplate.deleteIndex(Stu.class);
}
3.2 文档操作
/**
* 更新文档
*/
@Test
public void updateStuDoc() {
Map<String, Object> sourceMap = new HashMap<>();
sourceMap.put("sign", "you see you look");
sourceMap.put("money", 1001f);
sourceMap.put("age", 20);
IndexRequest indexRequest = new IndexRequest();
indexRequest.source(sourceMap);
UpdateQuery updateQuery = new UpdateQueryBuilder()
.withClass(Stu.class)
.withId("1002")
.withIndexRequest(indexRequest)
.build();
// update stu set sign = 'aaa' ,age=11.money=33 where id = '1002'
esTemplate.update(updateQuery);
}
/**
* 查询文档
*/
@Test
public void getStuDoc() {
GetQuery query = new GetQuery();
query.setId("1002");
Stu stu = esTemplate.queryForObject(query, Stu.class);
System.out.println(stu);
}
/**
* 删除文档
*/
@Test
public void deleteStuDoc() {
esTemplate.delete(Stu.class, "1002");
}
3.3 查询操作
/**
* 分页查询文档
*/
@Test
public void searchStuDoc() {
Pageable pageable = PageRequest.of(0, 10);
SearchQuery query = new NativeSearchQueryBuilder()
.withQuery(QueryBuilders.matchQuery("description","see you"))
.withPageable(pageable)
.build();
AggregatedPage<Stu> pageStu = esTemplate.queryForPage(query, Stu.class);
System.out.println("检索分页总数:" + pageStu.getTotalPages());
for (Stu stu : pageStu.getContent()) {
System.out.println(stu);
}
}
/**
* 分页查询文档 -- 并高亮
*/
@Test
public void highlightStuDoc() {
String preTage = "<font color='red'>";
String postTage = "</font>";
Pageable pageable = PageRequest.of(0, 10);
SortBuilder<FieldSortBuilder> sortBuilderMoney = new FieldSortBuilder("money").order(SortOrder.DESC);
SortBuilder<FieldSortBuilder> sortBuilderAge = new FieldSortBuilder("age").order(SortOrder.DESC);
SearchQuery query = new NativeSearchQueryBuilder()
.withQuery(QueryBuilders.matchQuery("description","a"))
.withHighlightFields(new HighlightBuilder.Field("description").preTags(preTage).postTags(postTage))
.withPageable(pageable)
.withSort(sortBuilderMoney)
.withSort(sortBuilderAge)
.build();
AggregatedPage<Stu> pageStu = esTemplate.queryForPage(query, Stu.class, new SearchResultMapper() {
@Override
public <T> AggregatedPage<T> mapResults(SearchResponse response, Class<T> clazz, Pageable pageable) {
List<Stu> highlightStuList = new ArrayList<>();
SearchHits hits = response.getHits();
for (SearchHit hit : hits) {
HighlightField highlightField = hit.getHighlightFields().get("description");
String description = highlightField.getFragments()[0].toString();
Object stuId = (Object) hit.getSourceAsMap().get("stuId");
String name = (String) hit.getSourceAsMap().get("name");
Integer age = (Integer) hit.getSourceAsMap().get("age");
String sign = (String) hit.getSourceAsMap().get("sign");
Object money = (Object) hit.getSourceAsMap().get("money");
Stu highlightStu = new Stu();
highlightStu.setDescription(description);
highlightStu.setStuId(Long.valueOf(stuId.toString()));
highlightStu.setName(name);
highlightStu.setAge(age);
highlightStu.setSign(sign);
highlightStu.setMoney(Float.parseFloat(money.toString()));
highlightStuList.add(highlightStu);
}
if(highlightStuList.size() > 0) {
return new AggregatedPageImpl<>((List<T>)highlightStuList);
}
return null;
}
});
System.out.println("检索分页总数:" + pageStu.getTotalPages());
for (Stu stu : pageStu.getContent()) {
System.out.println(stu);
}
}
4 相关信息
- 博文不易，辛苦各位猿友点个关注和赞，感谢