ElasticSearch[03]SpringData集成ElasticSearch

参考视频

【尚硅谷】ElasticSearch教程入门到精通（基于ELK技术栈elasticsearch 7.8.x版本）.

【狂神说Java】ElasticSearch7.6.x最新完整教程通俗易懂　P13.

【狂神说Java】ElasticSearch7.6.x最新完整教程通俗易懂　P14.

环境准备

SpringData-ElasticSearch测试

　　创建索引

　　删除索引

　　文档新增

　　文档修改

　　根据 id 查询文档

　　文档批量新增

　　文档查询所有

　　根据 id 删除文档

　　文档排序分页查询

　　文档多条件查询（条件+高亮+排序+分页）

环境准备

软件	版本
ElasticSearch	7.8.1
IDEA	2021.2
ElasticSearch Head	0.1.5

创建普通sping项目

pom.xml

添加依赖

    
        
            org.springframework.boot
            spring-boot-starter
        

        
            org.springframework.boot
            spring-boot-devtools
            runtime
            true
        
        
            org.springframework.boot
            spring-boot-configuration-processor
            true
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
        
            org.projectlombok
            lombok
            1.18.22
        
        
            com.alibaba
            fastjson
            1.2.75
        
        
            junit
            junit
            4.13.1
            compile
        
        
            org.springframework.data
            spring-data-elasticsearch
            4.0.9.RELEASE
            compile
        
        
            commons-httpclient
            commons-httpclient
            3.1
        
        
            org.elasticsearch.client
            elasticsearch-rest-client
        
        
            org.elasticsearch.client
            elasticsearch-rest-high-level-client

application.properties

#es hostname
elasticsearch.hostname=127.0.0.1
#es port
elasticsearch.port=9200
#es scheme
elasticsearch.scheme=http
#es indexName
elasticsearch.ES_INDEX=shopping_index

ElasticSearchClientConfig.java

编写ElasticSearchClient配置类

import lombok.Data;
import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;

@Configuration
@ConfigurationProperties(prefix = "elasticsearch")
@Data
@Component
public class ElasticSearchClientConfig {

    private String hostname;
    private Integer port;
    private String scheme;

    @Bean
    public RestHighLevelClient restHighLevelClient() {
        RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost(hostname, port, scheme))
        );
        return client;
    }
}

Product.java

编写pojo实体类

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.document;
import org.springframework.data.elasticsearch.annotations.Field;
import org.springframework.data.elasticsearch.annotations.FieldType;

@Data
@NoArgsConstructor
@AllArgsConstructor
@ToString
@document(indexName="shopping_index" , shards = 3, replicas = 0)
public class Product {
    //必须有 id,这里的 id 是全局唯一的标识，等同于 es 中的"_id"
    @Id
    private Long id;//商品唯一标识
    
    @Field(type = FieldType.Text, analyzer = "ik_max_word")
    private String title;//商品名称
    @Field(type = FieldType.Keyword)
    private String category;//分类名称
    @Field(type = FieldType.Double)
    private Double price;//商品价格
    @Field(type = FieldType.Keyword, index = false)
    private String images;//图片地址
}

ProductDao.java

编写pojo对应的dao，继承ElasticsearchRepository

package com.elasticsearch.springdata.dao;

import com.elasticsearch.springdata.pojo.Product;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface ProductDao extends ElasticsearchRepository {

}

SpringDataESIndexTest.java（ElasticsearchRestTemplate）

测试ElasticsearchRestTemplate

这里测试索引相关操作

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringDataESIndexTest {
    //注入 ElasticsearchRestTemplate
    @Autowired
    private ElasticsearchRestTemplate elasticsearchRestTemplate;

    @Value("${elasticsearch.ES_INDEX}")
    private String ES_INDEX;

}

SpringDataESDocTest.java（ElasticsearchRepository）

测试dao

这里测试简单的文档操作

import com.elasticsearch.springdata.dao.ProductDao;
import com.elasticsearch.springdata.pojo.Product;
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.Sort;

import java.util.ArrayList;
import java.util.List;

@SpringBootTest
public class SpringDataESDocTest {

    @Autowired
    private ProductDao productDao;
    
}

SpringDataESDocPageTest.java（RestHighLevelClient）

测试RestHighLevelClient

这里测试文档的多条件查询操作

import com.alibaba.fastjson.JSON;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.*;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.core.Timevalue;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.TermQueryBuilder;
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.elasticsearch.search.sort.SortOrder;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.test.context.SpringBootTest;

import java.io.IOException;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@SpringBootTest
public class SpringDataESDocPageTest {
    @Autowired
    @Qualifier("restHighLevelClient")
    private RestHighLevelClient client;

    @Value("${elasticsearch.ES_INDEX}")
    private String ES_INDEX;
    
}

SpringData-ElasticSearch测试 SpringDataESIndexTest.java 创建索引

    ///创建索引并增加映射配置
    @Test
    public void createIndex() {
        //创建索引，系统初始化会自动创建索引
        System.out.println("创建索引");
    }

创建索引

删除索引

    //删除索引
    @Test
    public void deleteIndex() {
        boolean flg = elasticsearchRestTemplate.indexOps(IndexCoordinates.of(ES_INDEX)).delete();
        System.out.println("删除索引 = " + flg);
    }

删除索引 = true

SpringDataESDocTest.java 文档新增

    //文档新增
    @Test
    public void save() {
        Product product = new Product();
        product.setId(1L);
        product.setTitle("华为手机");
        product.setCategory("手机");
        product.setPrice(2999.0);
        product.setImages("http://www.atguigu/hw.jpg");

        productDao.save(product);
    }