导入maven依赖

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<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.39</version>
</dependency>

application.properties

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# ElasticsearchProperties
# Elasticsearch
# 9200端口是用来让HTTP REST API来访问ElasticSearch，而9300端口是传输层监听的默认端口
elasticsearch.ip=127.0.0.1
elasticsearch.port=9300
elasticsearch.pool=5
#注意cluster.name需要与config/elasticsearch.yml中的cluster.name一致
elasticsearch.cluster.name=renjx

写一个配置类

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package com.example.wv.config;

import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.TransportAddress;
import org.elasticsearch.transport.client.PreBuiltTransportClient;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.net.InetAddress;

@Configuration
public class ElasticSearchConfig {

    /**
     * elk集群地址
     */
    @Value("${elasticsearch.ip}")
    private String hostName;

    /**
     * 端口
     */
    @Value("${elasticsearch.port}")
    private String port;

    /**
     * 集群名称
     */
    @Value("${elasticsearch.cluster.name}")
    private String clusterName;

    /**
     * 连接池
     */
    @Value("${elasticsearch.pool}")
    private String poolSize;

    /**
     * Bean name default  函数名字
     *
     * @return
     */
    @Bean(name = "transportClient")
    public TransportClient transportClient() {
        TransportClient transportClient = null;
        try {
            // 配置信息
            Settings esSetting = Settings.builder()
                    .put("cluster.name", clusterName) //集群名字
                    .put("client.transport.sniff", true)//增加嗅探机制，找到ES集群
                    .put("thread_pool.search.size", Integer.parseInt(poolSize))//增加线程池个数，暂时设为5
                    .build();
            //配置信息Settings自定义
            transportClient = new PreBuiltTransportClient(esSetting);
            TransportAddress transportAddress = new TransportAddress(InetAddress.getByName(hostName), Integer.parseInt(port));
            transportClient.addTransportAddresses(transportAddress);
        } catch (Exception e) {
            System.out.println(e.toString());
        }
        return transportClient;
    }
}