只是简单的整合介绍
安装
下载elasticsearch与kibana https://www.elastic.co/start
依赖
springBootVersion = '2.0.5.RELEASE'
compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-elasticsearch'
//请与spring-boot-starter-data-elasticsearch的jar包版本一致
compile('org.elasticsearch.client:transport:5.6.11') springBoot 2.0.5.RELEASE 起步依赖的elasticsearch的版本是 5.6.11
配置
- 可在application.yml中配置
spring:
data:
# 全文检索 elasticsearch
elasticsearch:
cluster-name: elasticsearch #节点名称
cluster-nodes: 127.0.0.1:9300 #节点地址
repositories:
enabled: true- 也可以通过java代码进行配置
package com.futao.springmvcdemo.foundation.configuration
import org.elasticsearch.client.transport.TransportClient
import org.elasticsearch.common.settings.Settings
import org.elasticsearch.common.transport.InetSocketTransportAddress
import org.elasticsearch.transport.client.PreBuiltTransportClient
import org.springframework.context.annotation.Bean
import org.springframework.context.annotation.Configuration
import org.springframework.data.elasticsearch.repository.config.EnableElasticsearchRepositories
import java.net.InetAddress
/**
* @author futao
* Created on 2018/10/22.
* ElasticSearch全文检索配置类
* 可替代配置文件中的配置
*/
@Configuration
@EnableElasticsearchRepositories(basePackages = ["com.futao.springmvcdemo.dao"])
open class ElasticSearchConfiguration {
@Bean
open fun client(): TransportClient {
val node = InetSocketTransportAddress(
InetAddress.getByName("127.0.0.1"), 9300)
val settings = Settings.builder()
.put("cluster.name", "springboot-elasticsearch") //集群名称可以在\elasticsearch\config\elasticsearch.yml中配置
.build()
return PreBuiltTransportClient(settings).addTransportAddress(node)
}
}名词解释
elasticsearch中的名词与mysql中的名字对比
使用
个人理解：相当于mysql的建表,程序跑起来之后会建立相应的index与type，后续程序中就可以使用该类型的index与type进行crud
package com.futao.springmvcdemo.model.entity;
import org.springframework.data.elasticsearch.annotations.Document;
/**
* @author futao
* Created on 2018/10/20.
* 文章
* indexName=database
* type=table
* row=document
* colnum=field
*/
@Document(indexName = "futao", type = "article")
public class Article extends BaseEntity {
/**
* 标题
*/
private String title;
/**
* 简介
*/
private String description;
/**
* 内容
*/
private String content;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
}插入数据
- Dao层
package com.futao.springmvcdemo.dao.impl
import com.futao.springmvcdemo.model.entity.Article
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository
/**
* @author futao
* Created on 2018/10/22.
*/
interface ArticleSearchDao : ElasticsearchRepository<Article, String> {
}- Service层
package com.futao.springmvcdemo.service.impl
import com.alibaba.fastjson.JSONObject
import com.futao.springmvcdemo.dao.ArticleDao
import com.futao.springmvcdemo.dao.impl.ArticleSearchDao
import com.futao.springmvcdemo.foundation.LogicException
import com.futao.springmvcdemo.model.entity.Article
import com.futao.springmvcdemo.model.entity.constvar.ErrorMessage
import com.futao.springmvcdemo.service.ArticleService
import com.futao.springmvcdemo.utils.currentTimeStamp
import com.futao.springmvcdemo.utils.getFieldName
import com.futao.springmvcdemo.utils.uuid
import org.elasticsearch.client.Client
import org.elasticsearch.index.query.QueryBuilders
import org.springframework.data.redis.core.RedisTemplate
import org.springframework.stereotype.Service
import javax.annotation.Resource
/**
* @author futao
* Created on 2018/10/20.
*/
@Service
open class ArticleServiceImpl : ArticleService {
@Resource
private lateinit var elasticsearch: ArticleSearchDao
@Resource
private lateinit var client: Client
override fun list(): List<Article> {
val list = articleDao.list()
elasticsearch.saveAll(list)
return list
}
/**
* 全文检索
*/
override fun search(key: String): ArrayList<Article> {
val hits = client.prepareSearch("futao")
.setTypes("article")
.setQuery(
QueryBuilders
.boolQuery()
.should(QueryBuilders.matchQuery(Article::getContent.getFieldName(), key))
.should(QueryBuilders.matchQuery(Article::getTitle.getFieldName(), key))
.should(QueryBuilders.matchQuery(Article::getDescription.getFieldName(), key))
)
.execute()
.actionGet()
.hits
val list: ArrayList<Article> = arrayListOf()
hits.forEach { it -> list.add(JSONObject.parseObject(it.sourceAsString, Article::class.java)) }
return list
}
}- controller层
package com.futao.springmvcdemo.controller.business;
import com.futao.springmvcdemo.model.entity.Article;
import com.futao.springmvcdemo.model.entity.SingleValueResult;
import com.futao.springmvcdemo.service.ArticleService;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import javax.annotation.Resource;
import java.util.List;
/**
* @author futao
* Created on 2018/10/20.
*/
@RestController
@RequestMapping(path = "article", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
public class ArticleController {
@Resource
private ArticleService articleService;
/**
* 新增文章
*
* @param title
* @param desc
* @param content
* @return
*/
@PostMapping(path = "add")
public SingleValueResult add(
@RequestParam("title") String title,
@RequestParam("desc") String desc,
@RequestParam("content") String content
) {
articleService.add(title, desc, content);
return new SingleValueResult("success");
}
/**
* 文章列表
*
* @return
*/
@GetMapping("list")
public List<Article> list() {
return articleService.list();
}
/**
* 全文检索
*
* @param key
* @return
*/
@GetMapping("search")
public List<Article> search(@RequestParam("key") String key) {
return articleService.search(key);
}
}- 在启动项目之前如果程序有抛出
java.lang.IllegalStateException: availableProcessors is already set to [4], rejecting [4]异常，则需要在启动类中添加：
package com.futao.springmvcdemo;
import com.alibaba.fastjson.parser.ParserConfig;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.data.elasticsearch.repository.config.EnableElasticsearchRepositories;
/**
* @author futao
* ServletComponentScan 开启servlet和filter
*/
@SpringBootApplication
@ServletComponentScan
@MapperScan("com.futao.springmvcdemo.dao")
@EnableCaching
//@EnableAspectJAutoProxy
@EnableElasticsearchRepositories(basePackages = "com.futao.springmvcdemo")
public class SpringmvcdemoApplication {
public static void main(String[] args) {
/**
* 添加elasticsearch之后发生异常的解决方案
* Springboot整合Elasticsearch 在项目启动前设置一下的属性，防止报错
* 解决netty冲突后初始化client时会抛出异常
* java.lang.IllegalStateException: availableProcessors is already set to [4], rejecting [4]
*/
System.setProperty("es.set.netty.runtime.available.processors", "false");
SpringApplication.run(SpringmvcdemoApplication.class, args);
/**
* redis反序列化
* 开启fastjson反序列化的autoType
*/
ParserConfig.getGlobalInstance().setAutoTypeSupport(true);
}
}测试
- 启动项目，可以在health中查看到相关的健康状况
- list接口请求(把数据放入elasticsearch中)
- 现在可以在kibana中查看到上面存入的数据
- 也可以进行简单的搜索测试
- 调用search接口测试
elasticsearch数据的存放位置(删除该文件夹下的数据即删除了所有的索引)
多的不说了，跟之前项目中用过的Hibernate Search很像，不过elasticsearch也是在架构层面实现的全文索引，elasticsearch可以部署在其他服务器上，减轻主服务器的压力，并通过http restful api的形式与主程序进行协调工作。elasticsearch一般通过集群方式进行部署，横向扩展非常简单，甚至只需要改几行配置就行。
