Linux 安裝Elasticsearch 以及查詢

下載
1、wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.4.0.tar.gz
解壓
2、tar -zxvf elasticsearch-6.4.0.tar.gz  

修改配置
cd /usr/local/apps/elasticsearch-6.4.0/config
vi elasticsearch.yml

 

 

需要改的內容：
 

# 集羣的名稱
cluster.name: test-cluster
# 當前節點的名稱
node.name: node-1
# ES數據存放地址
path.data: /usr/local/apps/elasticsearch-6.4.0/data
# ES日誌存放地址
path.logs: /usr/local/apps/elasticsearch-6.4.0/logs
# 當前節點的ip地址
network.host: 0.0.0.0
# ES服務的端口號
http.port: 9200
# 集羣每個節點的IP地址
# discovery.zen.ping.unicast.hosts: ["host1", "host2"]
# 集羣節點存活最少數, 建議: 總節點數/2 + 1
# discovery.zen.minimum_master_nodes: 

一下是修改的系統配置：

然後 修改ES啓動內存權限

vi /etc/sysctl.conf

•  

在文件末尾添加:
 

vm.max_map_count=262144

啓動es:

我們給es加了分組，

ES是不能以root用戶啓動的, 必須創建一個非root用戶來啓動ES.

# 創建用戶組es
groupadd es
# 創建用戶es, 屬於es用戶組, 密碼爲123456
useradd es -g es -p 123456
# 授予es用戶組下的es用戶, 對該路徑的讀權限
chown -R es:es /www/soft/es/elasticsearch-6.4.0/

執行完之後，java api 查詢：

<!-- 添加elasticsearch 依賴 -->
		<dependency>
            <groupId>org.elasticsearch</groupId>
            <artifactId>elasticsearch</artifactId>
            <version>6.4.0</version>
        </dependency>
        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>transport</artifactId>
            <version>6.4.0</version>
        </dependency>
        <dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.49</version>
		</dependency>

 

package com.boot.es.utils;

import java.net.InetAddress;

import org.elasticsearch.client.transport.TransportClient;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.TransportAddress;
import org.elasticsearch.transport.client.PreBuiltTransportClient;

/**
 * es工具類
 * 
 * @author zpl
 *
 */
@SuppressWarnings({ "resource", "unchecked" })
public class ESUtils {
	public static final String indexName = "test";// 索引名
	public static final String documentType = "student";// 索引類型
	public static TransportClient client = null;

	static {
		// ES配置
		Settings settings = Settings.builder().put("cluster.name", "zpl-application")// 集羣名稱
				.put("client.transport.sniff", true)// 是否自動檢測
				.build();
		try {

			client = new PreBuiltTransportClient(settings)
					.addTransportAddress(new TransportAddress(InetAddress.getByName("192.168.179.128")// es
																										// 主機地址
					, 9300));// 端口號
		} catch (Exception e) {
			e.printStackTrace();
		}

	}

	public static TransportClient getClient() {
		return client;
	}
}

 

package com.boot.es.controller;

import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;
import org.elasticsearch.action.index.IndexResponse;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.common.xcontent.XContentType;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.alibaba.fastjson.JSONObject;
import com.boot.es.utils.ESUtils;
import com.boot.split.entity.StudentEntity;

@RestController
@RequestMapping("/es")
public class ESController {

	@RequestMapping("/create/index.json")
	public void createIndex() {
		CreateIndexResponse response = ESUtils.getClient().admin()// admin權限
				.indices()// 索引集合
				.prepareCreate(ESUtils.indexName)// 索引名
				.execute().actionGet();// 請求
		if (response.isAcknowledged()) {
			System.out.println("add Index OK");
		} else {
			System.out.println("add Index NO");
		}
	}

	@RequestMapping("/create/book.json")
	public void createBook() {
		IndexResponse response = ESUtils.getClient().prepareIndex(ESUtils.indexName, ESUtils.documentType).get();
		System.out.println(response.getResult());
	}

	@RequestMapping("/create/document.json")
	public void insertDocument() {
		StudentEntity book = new StudentEntity(1, "張三", 18);// 創建一個Book對象
		IndexResponse response = ESUtils.getClient().prepareIndex(ESUtils.indexName, ESUtils.documentType)
				.setSource(JSONObject.toJSONString(book), XContentType.JSON).get();
		System.out.println(response.getResult());
	}

	@RequestMapping("/get/document.json")
	public void getDocument() {
		SearchResponse response = ESUtils.getClient().prepareSearch(ESUtils.indexName)
				.setTypes(ESUtils.documentType).get();
		System.out.println(response.toString());
	}

}

 

查詢參考：https://blog.csdn.net/u010454030/article/details/79703649