docker 安装ElasticSearch、springboot使用es

一、docker安装es

docker run -it --name elasticsearch -d -p 9200:9200 -p 9300:9300 -p 5601:5601 -e "discovery.type=single-node" docker.elastic.co/elasticsearch/elasticsearch:7.3.0

说明：

• 9300是tcp通讯端口，集群间和TCPClient都走的它;
• 9200是http协议的RESTful接口，后续的API接口测试都是走的它。
• 单节点部署添加启动参数 -e "discovery.type=single-node"

访问看到如下即可安装成功

在这里可能会出现跨域拒绝访问问题：

进入elasticsearch容器内部，修改配置文件elasticsearch.yml

docker ps -a   #拿到运行容器elasticsearch 的 id

docker exec -it ******(容器id) /bin/bash

cd ./config

vim elasticsearch.yml 

在elasticsearch.yml中添加：

http.cors.enabled: true
http.cors.allow-origin: "*"

二、springboot简单使用

这里我们采用spring-boot-starter-data-elasticsearch

1、新建springboot项目加入pom

<?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>2.2.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>cn.fengpt</groupId>
    <artifactId>spirng-es</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spirng-es</name>
    <description>Demo project for Spring Boot</description>

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

    <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.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

    </dependencies>

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

</project>

2、增加配置application.yml

spring:
  elasticsearch:
      rest:
        uris: http://127.0.0.1:9200

3、编写测试代码

dto

@Data
@Document(indexName = "test-index")
public class ElasticEntity {
    @Id
    private String id;
    private String name;
    private  Integer age;
}

dao

@Repository
public interface EsRepository extends ElasticsearchRepository<ElasticEntity, String> {
    
}

service

Slf4j
@Service
public class EsService {


    @Autowired
    EsRepository esRepository;

    public void  add(ElasticEntity elasticEntity){
        esRepository.save(elasticEntity);
    }

    public List<ElasticEntity>  getAll(){
        List<ElasticEntity> list=new ArrayList<>();
        Iterable<ElasticEntity> iterable = esRepository.findAll();
        iterable.forEach(list::add);
        return list;
    }


    public List<ElasticEntity> getByName(String name) {
        List<ElasticEntity> list=new ArrayList<>();
        MatchQueryBuilder queryBuilder=new MatchQueryBuilder("name",name);
        Iterable<ElasticEntity> personIterable=esRepository.search(queryBuilder);
        personIterable.forEach(list::add);
        return list;
    }

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

controller

@RestController
@Slf4j
public class EsController {

    @Autowired
    private  EsService esService;

    @PostMapping("/add")
    public String add(@RequestBody ElasticEntity elasticEntity){
        esService.add(elasticEntity);
        return "sucess";
    }

    @GetMapping("/getAll")
    public  List<ElasticEntity> getAll(){
        return  esService.getAll();
    }

    @GetMapping("/getByName")
    public List<ElasticEntity>getByName(@RequestParam("name") String name){
        return esService.getByName(name);
    }


    @GetMapping("/pageQuery")
    public Page<ElasticEntity>  pageQuery(@RequestParam("pageNo") Integer pageNo,
                                         @RequestParam("pageSize") Integer pageSize,
                                         @RequestParam("kw") String kw){
        return esService.pageQuery(pageNo,pageSize,kw);
    }


}

4、测试

• 调用新增接口/add
  
• 调用查询接口/getAll
  
• 调用搜索接口 getByName?name=三