1.添加依赖
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.xh</groupId>
<artifactId>01-es</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>01-es</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</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>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- es的依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>
<!-- 方便程序员对Bean类能够进行简便的操作。 -->
<dependency>
<groupId>commons-beanutils</groupId>
<artifactId>commons-beanutils</artifactId>
<version>1.9.3</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
2.配置文件
spring.application.name=es
#配置服务器的名字 只能是这个名字
spring.data.elasticsearch.cluster-name=elasticsearch
#配置集群节点的名字 es的连接地址及端口号
spring.data.elasticsearch.cluster-nodes=localhost:9300
#是否开启本地缓存
spring.data.elasticsearch.repositories.enabled=true
3.索引类型实体类
package com.xh.domain;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.data.elasticsearch.annotations.Document;
import org.springframework.data.elasticsearch.annotations.Field;
import org.springframework.data.elasticsearch.annotations.FieldType;
/**
* @Description:
* @Author: xiaohao
* @Time: 2022/3/14 12:04
*/
/*
indexName:索引
type:索引里面的类型
*/
@Data
@AllArgsConstructor
@NoArgsConstructor
@Document(indexName = "es_shop",type = "shop_product")
public class Product {
private String id;
/*
analyzer 存储时使用的分词器
searchAnalyzer 搜索时使用的分词器
type 数据类型
*/
@Field(analyzer = "ik_smart", searchAnalyzer = "ik_smart", type = FieldType.Text)
private String title;
private Integer price;//价格
@Field(analyzer = "ik_smart", searchAnalyzer = "ik_smart", type = FieldType.Text)
private String intro;//简介
//FieldType.Keyword 关键字
@Field(type = FieldType.Keyword)
private String brand;//品牌
}
4.高亮处理,测试类中
package com.xh;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.xh.dao.ProductRepository;
import com.xh.domain.Product;
import com.xh.service.ProductService;
import com.xh.service.impl.ProductServiceImpl;
import org.apache.commons.beanutils.BeanUtils;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.junit.Ignore;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
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.NativeSearchQueryBuilder;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
@SpringBootTest
class ApplicationTests {
@Autowired
private ProductService service;
//注入dao层是为了调用父接口中的方法进来封装条件,来完成一系列的操作
@Autowired
private ProductRepository repository;
//注入模板对象,高亮的时候使用
@Autowired
private ElasticsearchTemplate template;
//查询商品标题 或者简介中 符合 蓝牙 指纹 双卡 字样的商品,并且高亮显示
@Test
void testHightlight() {
ObjectMapper mapper = new ObjectMapper();
//建造一个NativeSearchQuery查询对象;,相当于把条件封装在里面
NativeSearchQueryBuilder builder = new NativeSearchQueryBuilder();
//你需要去找的索引和类型
builder.withIndices("es_shop").withTypes("shop_product");
//将条件封装在里面用于模糊查询
builder.withQuery(QueryBuilders.multiMatchQuery("蓝牙 指纹 双卡 ","title","intro"));
//在列添加属性
builder.withHighlightFields(
new HighlightBuilder.Field("title").
preTags("<span style='color:red;'>").postTags("</span>"),
new HighlightBuilder.Field("intro").
preTags("<span style='color:red;'>").postTags("</span>")
);
AggregatedPage<Product> page = template.queryForPage(builder.build(), Product.class, new SearchResultMapper() {
@Override
public <T> AggregatedPage<T> mapResults(SearchResponse response, Class<T> clazz, Pageable pageable) {
List<T> list = new ArrayList<>();
for (SearchHit hit:response.getHits().getHits()) {
list.add(mapSearchHit(hit,clazz));
}
long total = response.getHits().totalHits;
return new AggregatedPageImpl<>(list, pageable, total);
}
@Override
public <T> T mapSearchHit(SearchHit searchHit, Class<T> type) {
T t= null;
try {
t = mapper.readValue(searchHit.getSourceAsString(), type);
for (HighlightField field:searchHit.getHighlightFields().values()) {
//替换一下高亮显示的字段
BeanUtils.setProperty(t, field.getName(), field.getFragments()[0].string());
}
} catch (Exception e) {
e.printStackTrace();
return null;
}
return t;
}
});
page.forEach(System.err::println);
}
}