springboot2.1.4.RELEASE 整合 elasticsearch6.8.0

• 一、win10安装elasticsearch6.8.0
• 二、springboot整合elasticsearch

参考文档：es 集群可视化界面详细讲解
下载地址：https://www.elastic.co/cn/downloads/elasticsearch
1.1 选择版本

1.2 下载

1.3 修改配置文件：
在config目录下打开elasticsearch.yml修改配置文件
设置ip端口：也可直接将配置文件中的注释去掉，在做修改

#设置ip、端口
network.host: 127.0.0.1
http.port: 19200

解决跨域：

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

设置需要通过账号密码访问elasticsearch6.8.0：添加以下配置之后，Java连接es的时候需要添加用户名和密码

#开启权限特性
xpack.security.enabled: true
xpack.license.self_generated.type: basic
xpack.security.transport.ssl.enabled: true

 Elasticsearch 的默认账户为 elastic 默认密码为 changme

如果需要修改账户密码：可参考
1.3.1：ElasticSearch设置用户名密码访问

1.4 启动 elasticsearch6.8.0
下载完成之后解压安装包到相应目录下，在bin目录下打开elasticsearch.bat 即可启动

1.5 通过head插件访问elasticsearch

2.1 引入依赖

	
			org.elasticsearch.client
			elasticsearch-rest-high-level-client
			6.8.0
			
				
					org.elasticsearch.client
					elasticsearch-rest-client
				
				
					org.elasticsearch
					elasticsearch
				
			
		

		
			org.elasticsearch
			elasticsearch
			6.8.0
		
		
			org.elasticsearch.client
			elasticsearch-rest-client
			6.8.0
		

2.2 在application.yml文件中添加配置

elastic:
  host: ${ELASTIC_HOST:localhost}
  port: ${ELASTIC_PORT:19200}
  user: ${ELASTIC_USER:elastic}
  pass: ${ELASTIC_PASS:123456}

2.3 创建配置类

package com.lcm.web.config;

import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class SystemConfiguration {

    @Value("${elastic.host}")
    private String esHost;
    @Value("${elastic.port}")
    private int esPort;
    @Value("${elastic.user}")
    private String esUser;
    @Value("${elastic.pass}")
    private String esPass;

    @Bean
    public RestHighLevelClient initRestHighLevelClient() {
        final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
        //需要用户名和密码的认证
        credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(esUser, esPass));
        RestHighLevelClient client = new RestHighLevelClient(
            RestClient.builder(new HttpHost(esHost, esPort, "http")).setHttpClientConfigCallback(httpClientBuilder -> {
                httpClientBuilder.disableAuthCaching();
                return httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider);
            }));
        return client;
    }
}

2.4 说明
完成以上步骤后，在启动项目之后，springboot会自动加载配置类里面的配置链接es，当我们在其他类中需要操作es时，可通过以下方式注入es官网推荐的es客户端组件RestHighLevelClient：

 @Autowired
 private RestHighLevelClient restHighLevelClient;

使用方式及API可查看官方文档