elasticsearch7.9整合springboot

 

 

1、需要添加依赖

 

 

 

 

2、添加配置文件

package com.example.elasticsearch.shop.configure;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.elasticsearch.client.ClientConfiguration;
import org.springframework.data.elasticsearch.client.RestClients;
import org.springframework.data.elasticsearch.config.AbstractElasticsearchConfiguration;
import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;

@Configuration
class RestClientConfig extends AbstractElasticsearchConfiguration {
    @Bean
    @Override
    public RestHighLevelClient elasticsearchClient() {
        final ClientConfiguration clientConfiguration = ClientConfiguration.builder()
                .connectedTo("10.138.130.1:30217","10.138.130.1:32002","10.138.130.1:33785")
                .build();

        return RestClients.create(clientConfiguration).rest();
    }
    @Bean(name = { "elasticsearchOperations", "elasticsearchRestTemplate" })
    public ElasticsearchRestTemplate elasticsearchTemplate() {
        return new ElasticsearchRestTemplate(elasticsearchClient());
    }
}

3、创建索引

public Boolean createIndex() {
        return elasticsearchRestTemplate.indexOps(ShopEntity.class).create();
    }

　　

4、创建mapping

  Document mapping = elasticsearchRestTemplate.indexOps(ShopEntity.class).createMapping(ShopEntity.class);
        boolean brue = elasticsearchRestTemplate.indexOps(ShopEntity.class).putMapping(mapping);
        System.out.println(brue);
        System.out.println(mapping);

　　docker部署elasticsearch环境变量设置

cluster.name: "elasticsearch-cluster"
network.host: 0.0.0.0
node.name: elasticsearch-server-01
node.master: true
node.data: true
discovery.seed_hosts: ["elasticsearch-server-01", "elasticsearch-server-02", "elasticsearch-server-03"]
cluster.initial_master_nodes: ["elasticsearch-server-01", "elasticsearch-server-02", "elasticsearch-server-03"]

 elasticsearch类型为啥去掉？

elasticsearch强掉的是全文检索，所以type没有意义了

elasticsearch倒排索引理解

1001  zhangsan

1002  lisi

1003 wagnwu zhang

倒排索引表

zhang   1001 1003

san       1001

li          1002

si         1002

 

9300和9200端口区别

9300是es集群之间通信端口，9200是与客户端通信端口

 集群配置

config-elasticsearch.yml配置

cluster配置

cluster.name:es

node配置

node.name:node01

node.master:true

node.data:true

network配置

network.host:localhost

http.port:1001

transport.tcp.port:9301

discovery.send_hosts:["localhost:9301"]    //集群第一台不需要配置，第二台需要配置，查找另外的一台es

discovery.zen.fd.ping_timeout: 1m

discovery.zen.fd.ping_retries: 5

 

http.cors.enabled:true

http.cors.allow-origin:"*"

 分片的理解

数据分别存放到不同 的分片上，所有的分片数据组成完整的数据，分片是最小的单元

 学习参考视频：https://www.bilibili.com/video/BV1hh411D7sb?p=62&spm_id_from=pageDriver