Spring Boot & ES 实战,直接拿来用

  • 小编 发布于 2019-12-01 10:52:53
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Spring Boot & ES 实战,直接拿来用

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01 前言

1.1. 集成方式

Spring Boot中集成Elasticsearch有4种方式:

  • REST Client

  • Jest

  • Spring Data

  • Spring Data Elasticsearch Repositories

  • 本文用后面两种方式来分别连接并操作Elasticsearch

1.2. 环境与配置

服务端:elasticsearch-6.3.2 1台

客户端:elasticsearch 6.4.1

服务端配置文件:elasticsearch.yml

cluster.name: my-application
network.host: 192.168.1.134
http.port: 9200
/etc/security/limits.confcheng soft nofile 65536
cheng hard nofile 65536
/etc/sysctl.confvm.max_map_count=262144

1.3. 版本

Spring Boot 2.0.5默认的elasticsearch版本很低,这里我们用最新版本6.4.1如果启动过程中出现java.lang.NoClassDefFoundError: org/elasticsearch/common/transport/InetSocketTransportAddress则说明,elasticsearch依赖的jar包版本不一致,统一改成6.4.1即可另外,Spring Boot 2.0.5依赖的spring-data-elasticsearch版本是3.0.1,需要升级到3.1.0

Spring Boot & ES 实战,直接拿来用

02 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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>com.cjs.example</groupId>
<artifactId>cjs-elasticsearch-example</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>cjs-elasticsearch-example</name>
<description></description>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>

<elasticsearch.version>6.4.1</elasticsearch.version>
<spring.data.elasticsearch.version>3.1.0.RELEASE</spring.data.elasticsearch.version>
</properties>

<dependencies>
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>${elasticsearch.version}</version>
</dependency>
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>transport</artifactId>
<version>${elasticsearch.version}</version>
</dependency>
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-client</artifactId>
<version>${elasticsearch.version}</version>
</dependency>
<dependency>
<groupId>org.elasticsearch.plugin</groupId>
<artifactId>transport-netty4-client</artifactId>
<version>${elasticsearch.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-elasticsearch</artifactId>
<version>${spring.data.elasticsearch.version}</version>
</dependency>
<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.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>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>

03 application.properties

spring.data.elasticsearch.cluster-name=my-application
spring.data.elasticsearch.cluster-nodes=192.168.1.134:9300

也许,大家会疑惑,配置文件中明明写的端口是9200,为何这里配置文件中连接的时候写的端口是9300呢?

因为,配置9200是通过HTTP连接的端口,9300是TCP连接的端口

Spring Boot & ES 实战,直接拿来用

04 操作

4.1. 使用Spring Data Elasticsearch Repositories操作Elasticsearch

首先,定义一个实体类

package com.cjs.example.entity;

import lombok.Data;
import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.Document;

import java.io.Serializable;

@Data
@Document(indexName = "commodity")
public class Commodity implements Serializable {

@Id
private String skuId;

private String name;

private String category;

private Integer price;

private String brand;

private Integer stock;

}
这里定义了Commodity实例,表示商品。在Elasticsearch 6.X 版本中,不建议使用type,而且在7.X版本中将会彻底废弃type,所以此处我只指定了indexName,没有指定type。这里,一个Commodity代表一个商品,同时代表一条索引记录。类比关系型数据库的话,Index相当于表,Document相当于记录,然后,需要自己定义一个接口,并继承ElasticsearchRepository。

Spring Boot & ES 实战,直接拿来用
package com.cjs.example.dao;

import com.cjs.example.entity.Commodity;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface CommodityRepository extends ElasticsearchRepository<Commodity, String> {

}
这里的Repository相当于DAO,操作mysql还是elasticsearch都是一样的接下来,定义service接口package com.cjs.example.service;

import com.cjs.example.entity.Commodity;
import org.springframework.data.domain.Page;

import java.util.List;

public interface CommodityService {

long count();

Commodity save(Commodity commodity);

void delete(Commodity commodity);

Iterable<Commodity> getAll();

List<Commodity> getByName(String name);

Page<Commodity> pageQuery(Integer pageNo, Integer pageSize, String kw);

}
实现类package com.cjs.example.service.impl;

import com.cjs.example.entity.Commodity;
import com.cjs.example.dao.CommodityRepository;
import com.cjs.example.service.CommodityService;
import org.elasticsearch.index.query.MatchQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
import org.springframework.data.elasticsearch.core.query.SearchQuery;
import org.springframework.stereotype.Service;

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

@Service
public class CommodityServiceImpl implements CommodityService {

@Autowired
private CommodityRepository commodityRepository;


@Override
public long count() {
return commodityRepository.count();
}

@Override
public Commodity save(Commodity commodity) {
return commodityRepository.save(commodity);
}

@Override
public void delete(Commodity commodity) {
commodityRepository.delete(commodity);
// commodityRepository.deleteById(commodity.getSkuId());
}

@Override
public Iterable<Commodity> getAll() {
return commodityRepository.findAll();
}

@Override
public List<Commodity> getByName(String name) {
List<Commodity> list = new ArrayList<>();
MatchQueryBuilder matchQueryBuilder = new MatchQueryBuilder("name", name);
Iterable<Commodity> iterable = commodityRepository.search(matchQueryBuilder);
iterable.forEach(e->list.add(e));
return list;
}

@Override
public Page<Commodity> pageQuery(Integer pageNo, Integer pageSize, String kw) {
SearchQuery searchQuery = new NativeSearchQueryBuilder()
.withQuery(QueryBuilders.matchPhraseQuery("name", kw))
.withPageable(PageRequest.of(pageNo, pageSize))
.build();
return commodityRepository.search(searchQuery);
}


}
在这个Service中演示了增删查改操作,还有分页查询最后,写一个测试类测试其中的方法package com.cjs.example;

import com.cjs.example.entity.Commodity;
import com.cjs.example.service.CommodityService;
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.Page;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest
public class CjsElasticsearchExampleApplicationTests {

@Autowired
private CommodityService commodityService;

@Test
public void contextLoads() {
System.out.println(commodityService.count());
}

@Test
public void testInsert() {
Commodity commodity = new Commodity();
commodity.setSkuId("1501009001");
commodity.setName("原味切片面包(10片装)");
commodity.setCategory("101");
commodity.setPrice(880);
commodity.setBrand("良品铺子");
commodityService.save(commodity);

commodity = new Commodity();
commodity.setSkuId("1501009002");
commodity.setName("原味切片面包(6片装)");
commodity.setCategory("101");
commodity.setPrice(680);
commodity.setBrand("良品铺子");
commodityService.save(commodity);

commodity = new Commodity();
commodity.setSkuId("1501009004");
commodity.setName("元气吐司850g");
commodity.setCategory("101");
commodity.setPrice(120);
commodity.setBrand("百草味");
commodityService.save(commodity);

}

@Test
public void testDelete() {
Commodity commodity = new Commodity();
commodity.setSkuId("1501009002");
commodityService.delete(commodity);
}

@Test
public void testGetAll() {
Iterable<Commodity> iterable = commodityService.getAll();
iterable.forEach(e->System.out.println(e.toString()));
}

@Test
public void testGetByName() {
List<Commodity> list = commodityService.getByName("面包");
System.out.println(list);
}

@Test
public void testPage() {
Page<Commodity> page = commodityService.pageQuery(0, 10, "切片");
System.out.println(page.getTotalPages());
System.out.println(page.getNumber());
System.out.println(page.getContent());
}
}
以上,便是使用Elasticsearch Repositories的方式

4.2. 使用ElasticsearchTemplate方式操作Elasticsearch

package com.cjs.example;

import com.cjs.example.entity.Commodity;
import org.elasticsearch.index.query.QueryBuilders;
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.elasticsearch.core.ElasticsearchTemplate;
import org.springframework.data.elasticsearch.core.query.*;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest
public class ElasticsearchTemplateTest {

@Autowired
public ElasticsearchTemplate elasticsearchTemplate;

@Test
public void testInsert() {
Commodity commodity = new Commodity();
commodity.setSkuId("1501009005");
commodity.setName("葡萄吐司面包(10片装)");
commodity.setCategory("101");
commodity.setPrice(160);
commodity.setBrand("良品铺子");

IndexQuery indexQuery = new IndexQueryBuilder().withObject(commodity).build();
elasticsearchTemplate.index(indexQuery);
}

@Test
public void testQuery() {
SearchQuery searchQuery = new NativeSearchQueryBuilder()
.withQuery(QueryBuilders.matchQuery("name", "吐司"))
.build();
List<Commodity> list = elasticsearchTemplate.queryForList(searchQuery, Commodity.class);
System.out.println(list);
}

}
ElasticsearchTemplate是自动配置的

Spring Boot & ES 实战,直接拿来用

05 演示

Spring Boot & ES 实战,直接拿来用

06 工程结构

Spring Boot & ES 实战,直接拿来用

07 参考

docs.spring.io/spring-data/elasticsearch/docs/3.1.0.RELEASE/reference/html/#repositories.query-methods.details

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