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这篇文章主要讲解了“springboot2.1.6集成elasticsearch6.4.3如何实现全文搜索”,文中的讲解内容简单清晰,易于学习与理解,下面请大家跟着小编的思路慢慢深入,一起来研究和学习“springboot2.1.6集成elasticsearch6.4.3如何实现全文搜索”吧!
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由于项目需要elasticsearch做全文搜索,其基本介绍如下:
简介:ElasticSearch是一个基于Lucene的搜索服务器。它提供了一个分布式多用户能力的全文搜索引擎,基于RESTful web接口。Elasticsearch是用Java开发的,并作为Apache许可条款下的开放源码发布,是当前流行的企业级搜索引擎。设计用于云计算中,能够达到实时搜索,稳定,可靠,快速,安装使用方便。官方客户端在Java、.NET(C#)、PHP、Python、Apache Groovy、Ruby和许多其他语言中都是可用的。根据DB-Engines的排名显示,Elasticsearch是最受欢迎的企业搜索引擎,其次是Apache Solr,也是基于Lucene。
springboot整合elasticsearch常有方式主要有三种:
1.Java API 基于TCP和ES通信,官方已经明确表示在ES 7.0版本中将弃用TransportClient客户端,且在8.0版本中完全移除它,所以不提倡。 2.REST Client 上面的方式1是基于TCP和ES通信的(而且TransPort将来会被抛弃……),官方也给出了基于HTTP的客户端REST Client(推荐使用),官方给出来的REST Client有Java Low Level REST Client和Java Hight Level REST Client两个,前者兼容所有版本的ES,后者是基于前者开发出来的,只暴露了部分API. 3.spring-data-elasticsearch 除了上述方式,Spring也提供了本身基于SpringData实现的一套方案spring-data-elasticsearch
spring-data-elasticsearch集成Es这种方式,封装了比较常见的es操作,和JPA操作数据库一样便捷,只需要继承 ElasticsearchRepository就可以实现常见的es操作了。
public interface UserESRepository extends ElasticsearchRepository{}
在测试的过程中,鼓捣了两天多都好无进展,始终报如下错误:
Caused by: org.elasticsearch.client.transport.NoNodeAvailableException: None of the configured nodes are available: [{#transport#-1}{kgdgqCDKRlm9rjdj2B_s8A}{47.89.250.94}{47.89.250.94:9300}]
看了很多博客,基本上说是端口和cluster-name 不对应的造成的,可是改了之后还是报错,后来才知道版本不对应造成的。
依赖文件build.gradle:
plugins { id 'org.springframework.boot' version '2.1.6.RELEASE' id 'java' } apply plugin: 'io.spring.dependency-management' group = 'com.example' version = '0.0.1-SNAPSHOT' sourceCompatibility = '1.8' repositories { mavenCentral() } dependencies { implementation 'org.springframework.boot:spring-boot-starter-data-elasticsearch' implementation 'org.springframework.boot:spring-boot-starter-web' testImplementation 'org.springframework.boot:spring-boot-starter-test' }
配置文件application.yml:
spring: data: elasticsearch: cluster-name: EStest cluster-nodes: 127.0.0.1:9300 server: port: 8080
到官网:https://www.elastic.co/cn/downloads/past-releases/官网
可以下载历史版本,最新版本为(7.2.0),不建议使用最新的
我使用的版本:
springboot版本 | Elasticsearch版本 |
---|---|
2.1.6 | 6.4.3 |
下载后文件目录:
进入config文件夹后,修改 elasticsearch.yml :
# ======================== Elasticsearch Configuration ========================= # # NOTE: Elasticsearch comes with reasonable defaults for most settings. # Before you set out to tweak and tune the configuration, make sure you # understand what are you trying to accomplish and the consequences. # # The primary way of configuring a node is via this file. This template lists # the most important settings you may want to configure for a production cluster. # # Please consult the documentation for further information on configuration options: # https://www.elastic.co/guide/en/elasticsearch/reference/index.html # # ---------------------------------- Cluster ----------------------------------- # # Use a descriptive name for your cluster: # cluster.name: EStest # # ------------------------------------ Node ------------------------------------ # # Use a descriptive name for the node: # node.name: node-1 # # Add custom attributes to the node: # #node.attr.rack: r1 # # ----------------------------------- Paths ------------------------------------ # # Path to directory where to store the data (separate multiple locations by comma): # #path.data: /path/to/data # # Path to log files: # #path.logs: /path/to/logs # # ----------------------------------- Memory ----------------------------------- # # Lock the memory on startup: # #bootstrap.memory_lock: true # # Make sure that the heap size is set to about half the memory available # on the system and that the owner of the process is allowed to use this # limit. # # Elasticsearch performs poorly when the system is swapping the memory. # # ---------------------------------- Network ----------------------------------- # # Set the bind address to a specific IP (IPv4 or IPv6): # network.host: 0.0.0.0 # # Set a custom port for HTTP: # http.port: 9200 # # For more information, consult the network module documentation. # # --------------------------------- Discovery ---------------------------------- # # Pass an initial list of hosts to perform discovery when new node is started: # The default list of hosts is ["127.0.0.1", "[::1]"] # #discovery.zen.ping.unicast.hosts: ["host1", "host2"] # # Prevent the "split brain" by configuring the majority of nodes (total number of master-eligible nodes / 2 + 1): # #discovery.zen.minimum_master_nodes: # # For more information, consult the zen discovery module documentation. # # ---------------------------------- Gateway ----------------------------------- # # Block initial recovery after a full cluster restart until N nodes are started: # #gateway.recover_after_nodes: 3 # # For more information, consult the gateway module documentation. # # ---------------------------------- Various ----------------------------------- # # Require explicit names when deleting indices: # #action.destructive_requires_name: true http.cors.enabled: true http.cors.allow-origin: "*" node.master: true node.data: true
提示: 这里的cluster.name: EStest 要与application.yml中的cluster-name: EStest保持一致
启动 elasticsearch 脚本,双击即可启动
在浏览器中输入http://localhost:9200/ ,出现如下就说明启动成功:
<1>创建实体:
package com.example.demo; import com.fasterxml.jackson.annotation.JsonFormat; import lombok.Data; import lombok.experimental.Accessors; import org.springframework.data.annotation.Id; import org.springframework.data.elasticsearch.annotations.Document; import org.springframework.data.elasticsearch.annotations.Field; import org.springframework.data.elasticsearch.annotations.FieldType; import java.io.Serializable; /* *@Description: Blog实体 *@ClassName: BlogModel *@Author: zzq *@Date: 2019/7/19 17:47 *@Version: 1.0 */ @Data @Accessors(chain = true) @Document(indexName = "blog", type = "user") public class BlogModel implements Serializable { private static final long serialVersionUID = 1L; @Id private Long id; @Field(type = FieldType.Text, analyzer = "ik_max_word") private String title; //@Field(type = FieldType.Date, format = DateFormat.basic_date) public BlogModel(){ } public BlogModel(Long id, String title) { this.id = id; this.title = title; } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } @Override public String toString() { return "BlogModel{" + "id='" + id + '\'' + ", title='" + title + '\'' + '}'; } }
<2> 创建操作数据的Repository
package com.example.demo; import org.springframework.data.elasticsearch.repository.ElasticsearchRepository; /* *@Description: 数据仓库 *@ClassName: BlogRepository *@Author: zzq *@Date: 2019/7/19 17:48 *@Version: 1.0 */ public interface BlogRepository extends ElasticsearchRepository{ }
<3>创建controller
package com.example.demo; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Repository; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import java.util.List; /* *@Description: controller *@ClassName: BlogController *@Author: zzq *@Date: 2019/7/19 17:49 *@Version: 1.0 */ @RestController @RequestMapping("/blog") @Repository public class BlogController { @Autowired private BlogRepository blogRepository; @GetMapping("/save") public String add() { BlogModel blogModel = new BlogModel(); blogModel.setTitle("superheros"); blogRepository.save(blogModel); return "ok"; } private String title = ""; @GetMapping("/get") public String get(){ Iterablelist = (List ) blogRepository.findAll(); list.forEach(blogModel -> { title += blogModel.toString() + "\n"; }); return title; } }
<4>启动入口
package com.example.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class ElasticsearchApplication { public static void main(String[] args) { SpringApplication.run(ElasticsearchApplication.class, args); } }
查询:
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感谢各位的阅读,以上就是“springboot2.1.6集成elasticsearch6.4.3如何实现全文搜索”的内容了,经过本文的学习后,相信大家对springboot2.1.6集成elasticsearch6.4.3如何实现全文搜索这一问题有了更深刻的体会,具体使用情况还需要大家实践验证。这里是创新互联,小编将为大家推送更多相关知识点的文章,欢迎关注!