作者:王帅@CodeSheep

Spring Boot 集成 ElasticSearch 实现模糊搜索 | 文末签到福利_elasticsearch

实验环境


  • ES 版本:5.3.0
  • Spring Boot 版本:1.5.9

首先当然需要安装好 Elastic Search 环境,最好再安装上可视化插件 elasticsearch-head来便于我们直观地查看数据。

当然这部分可以参考本人的帖子: 《centos7 上 elastic search安装填坑记》 https://www.jianshu.com/p/04f4d7b4a1d3

我的ES安装在http://113.209.119.170:9200/ 这个地址(该地址需要配到springboot项目中去)

Spring工程创建

这部分没有特殊要交代的,但有几个注意点一定要当心

  • 注意在新建项目时记得勾选web和NoSQL中的Elasticsearch依赖,来张图说明一下吧:

Spring Boot 集成 ElasticSearch 实现模糊搜索 | 文末签到福利_elasticsearch_02

项目自动生成以后pom.xml中会自动添加 ​spring-boot-starter-data-elasticsearch​的依赖:

<dependency>


<groupId>org.springframework.boot</groupId>


<artifactId>spring-boot-starter-data-elasticsearch</artifactId>


</dependency>
  • 本项目中我们使用开源的基于restful的es java客户端 jest,所以还需要在pom.xml中添加 jest依赖:
<dependency>


<groupId>io.searchbox</groupId>


<artifactId>jest</artifactId>


</dependency>
  • 除此之外还必须添加 jna的依赖:
<dependency>


<groupId>net.java.dev.jna</groupId>


<artifactId>jna</artifactId>


</dependency>

否则启动spring项目的时候会报 ​JNAnotfound.nativemethods will be disabled.​的错误:

Spring Boot 集成 ElasticSearch 实现模糊搜索 | 文末签到福利_spring_03

  • 项目的配置文件application.yml中需要把es服务器地址配置对
server:

port: 6325



spring:

elasticsearch:

jest:

uris:

- http://113.209.119.170:9200 # ES服务器的地址!

read-timeout: 5000

代码组织

我的项目代码组织如下:Spring Boot 集成 ElasticSearch 实现模糊搜索 | 文末签到福利_spring_04

各部分代码详解如下,注释都有:

  • Entity.java
package com.hansonwang99.springboot_es_demo.entity;

import java.io.Serializable;

import org.springframework.data.elasticsearch.annotations.Document;



public class Entity implements Serializable{



private static final long serialVersionUID = -763638353551774166L;



public static final String INDEX_NAME = "index_entity";



public static final String TYPE = "tstype";



private Long id;



private String name;



public Entity() {

super();

}



public Entity(Long id, String name) {

this.id = id;

this.name = name;

}



public Long getId() {

return id;

}



public void setId(Long id) {

this.id = id;

}



public String getName() {

return name;

}



public void setName(String name) {

this.name = name;

}





}
  • TestService.java
package com.hansonwang99.springboot_es_demo.service;



import com.hansonwang99.springboot_es_demo.entity.Entity;



import java.util.List;



public interface TestService {



void saveEntity(Entity entity);



void saveEntity(List<Entity> entityList);



List<Entity> searchEntity(String searchContent);

}
  • TestServiceImpl.java
package com.hansonwang99.springboot_es_demo.service.impl;



import java.io.IOException;

import java.util.List;



import com.hansonwang99.springboot_es_demo.entity.Entity;

import com.hansonwang99.springboot_es_demo.service.TestService;

import org.elasticsearch.index.query.QueryBuilders;

import org.elasticsearch.search.builder.SearchSourceBuilder;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import io.searchbox.client.JestClient;

import io.searchbox.client.JestResult;

import io.searchbox.core.Bulk;

import io.searchbox.core.Index;

import io.searchbox.core.Search;



@Service

public class TestServiceImpl implements TestService {



private static final Logger LOGGER = LoggerFactory.getLogger(TestServiceImpl.class);



@Autowired

private JestClient jestClient;



@Override

public void saveEntity(Entity entity) {

Index index = new Index.Builder(entity).index(Entity.INDEX_NAME).type(Entity.TYPE).build();

try {

jestClient.execute(index);

LOGGER.info("ES 插入完成");

} catch (IOException e) {

e.printStackTrace();

LOGGER.error(e.getMessage());

}

}





/**

* 批量保存内容到ES

*/

@Override

public void saveEntity(List<Entity> entityList) {

Bulk.Builder bulk = new Bulk.Builder();

for(Entity entity : entityList) {

Index index = new Index.Builder(entity).index(Entity.INDEX_NAME).type(Entity.TYPE).build();

bulk.addAction(index);

}

try {

jestClient.execute(bulk.build());

LOGGER.info("ES 插入完成");

} catch (IOException e) {

e.printStackTrace();

LOGGER.error(e.getMessage());

}

}



/**

* 在ES中搜索内容

*/

@Override

public List<Entity> searchEntity(String searchContent){

SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();

//searchSourceBuilder.query(QueryBuilders.queryStringQuery(searchContent));

//searchSourceBuilder.field("name");

searchSourceBuilder.query(QueryBuilders.matchQuery("name",searchContent));

Search search = new Search.Builder(searchSourceBuilder.toString())

.addIndex(Entity.INDEX_NAME).addType(Entity.TYPE).build();

try {

JestResult result = jestClient.execute(search);

return result.getSourceAsObjectList(Entity.class);

} catch (IOException e) {

LOGGER.error(e.getMessage());

e.printStackTrace();

}

return null;

}

}
  • EntityController.java
package com.hansonwang99.springboot_es_demo.controller;



import java.util.ArrayList;

import java.util.List;



import com.hansonwang99.springboot_es_demo.entity.Entity;

import com.hansonwang99.springboot_es_demo.service.TestService;

import org.apache.commons.lang.StringUtils;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RestController;



@RestController

@RequestMapping("/entityController")

public class EntityController {





@Autowired

TestService cityESService;



@RequestMapping(value="/save", method=RequestMethod.GET)

public String save(long id, String name) {

System.out.println("save 接口");

if(id>0 && StringUtils.isNotEmpty(name)) {

Entity newEntity = new Entity(id,name);

List<Entity> addList = new ArrayList<Entity>();

addList.add(newEntity);

cityESService.saveEntity(addList);

return "OK";

}else {

return "Bad input value";

}

}



@RequestMapping(value="/search", method=RequestMethod.GET)

public List<Entity> save(String name) {

List<Entity> entityList = null;

if(StringUtils.isNotEmpty(name)) {

entityList = cityESService.searchEntity(name);

}

return entityList;

}

}

实际实验

增加几条数据,可以使用postman工具,也可以直接在浏览器中输入,如增加以下5条数据:

http://localhost:6325/entityController/save?id=1&name=南京中山陵


http://localhost:6325/entityController/save?id=2&name=中国南京师范大学


http://localhost:6325/entityController/save?id=3&name=南京夫子庙


http://localhost:6325/entityController/save?id=4&name=杭州也非常不错


http://localhost:6325/entityController/save?id=5&name=中国南边好像没有叫带京字的城市了

数据插入效果如下(使用可视化插件elasticsearch-head观看):Spring Boot 集成 ElasticSearch 实现模糊搜索 | 文末签到福利_java_05

我们来做一下搜索的测试:例如我要搜索关键字“南京” 我们在浏览器中输入:

http://localhost:6325/entityController/search?name=南京

搜索结果如下:

Spring Boot 集成 ElasticSearch 实现模糊搜索 | 文末签到福利_spring_06

刚才插入的5条记录中包含关键字“南京”的四条记录均被搜索出来了!

当然这里用的是standard分词方式,将每个中文都作为了一个term,凡是包含“南”、“京”关键字的记录都被搜索了出来,只是评分不同而已,当然还有其他的一些分词方式,此时需要其他分词插件的支持,此处暂不涉及,后文中再做探索。

由于能力有限,若有错误或者不当之处,还请大家批评指正,一起学习交流!

-The End-


Spring Boot 集成 ElasticSearch 实现模糊搜索 | 文末签到福利_spring_07

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