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SpringBoot整合elasticsearch

在這一篇文章開始之前,你需要先安裝一個ElasticSearch,如果你是mac或者linux可以參考https://www.jianshu.com/p/e47b451375ea,如果是windows可以自定百度一下。

下面是官方套話介紹elasticsearch:

ElasticSearch是一個基於Lucene的搜尋伺服器。它提供了一個分散式多使用者能力的全文搜尋引擎,基於RESTful web介面。Elasticsearch是用Java開發的,並作為Apache許可條款下的開放原始碼釋出,是當前流行的企業級搜尋引擎。設計用於雲端計算中,能夠達到實時搜尋,穩定,可靠,快速,安裝使用方便。 我們建立一個網站或應用程式,並要新增搜尋功能,但是想要完成搜尋工作的建立是非常困難的。我們希望搜尋解決方案要執行速度快,我們希望能有一個零配置和一個完全免費的搜尋模式,我們希望能夠簡單地使用JSON通過HTTP來索引資料,我們希望我們的搜尋伺服器始終可用,我們希望能夠從一臺開始並擴充套件到數百臺,我們要實時搜尋,我們要簡單的多租戶,我們希望建立一個雲的解決方案。因此我們利用Elasticsearch來解決所有這些問題及可能出現的更多其它問題。

具體elasticsearch相關問題可以去elastic中文社群檢視。

這一篇文章將介紹springboot如何簡單整合elasticsearch。

1.啟動elasticsearch。 2.新建專案,pom檔案中加入elasticsearch依賴,完整pom如下:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.dalaoyang</groupId>
    <artifactId>springboot_elasticsearch</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>springboot_elasticsearch</name>
    <description>springboot_elasticsearch</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>

配置檔案如下:

##埠號
server.port=8888

##es地址
spring.data.elasticsearch.cluster-nodes = 127.0.0.1:9300

新建一個商品實體類GoodsInfo,其中需要注意: indexName:索引名稱 可以理解為資料庫名 必須為小寫 不然會報org.elasticsearch.indices.InvalidIndexNameException異常 type:型別 可以理解為表名

package com.dalaoyang.entity;

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

import java.io.Serializable;

/**
 * @author dalaoyang
 * @Description
 * @project springboot_learn
 * @package com.dalaoyang.entity
 * @email 
[email protected]
* @date 2018/5/4 */ @Document(indexName = "testgoods",type = "goods") //indexName索引名稱 可以理解為資料庫名 必須為小寫 不然會報org.elasticsearch.indices.InvalidIndexNameException異常 //type型別 可以理解為表名 public class GoodsInfo implements Serializable { private Long id; private String name; private String description; 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; } public String getDescription() { return description; } public void setDescription(String description) { this.description = description; } public GoodsInfo(Long id, String name, String description) { this.id = id; this.name = name; this.description = description; } public GoodsInfo() { } }

建立GoodsRepository,繼承ElasticsearchRepository,程式碼如下:

package com.dalaoyang.repository;

import com.dalaoyang.entity.GoodsInfo;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import org.springframework.stereotype.Component;

/**
 * @author dalaoyang
 * @Description
 * @project springboot_learn
 * @package com.dalaoyang.repository
 * @email [email protected]
 * @date 2018/5/4
 */
@Component
public interface GoodsRepository extends ElasticsearchRepository<GoodsInfo,Long> {
}

最後新建一個controller進行測試,其中包含簡單的增刪改查以及一個搜尋,增刪改查這裡不做解釋了。需要注意es的第一頁頁碼是0

package com.dalaoyang.controller;

import com.dalaoyang.entity.GoodsInfo;
import com.dalaoyang.repository.GoodsRepository;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.functionscore.FunctionScoreQueryBuilder;
import org.elasticsearch.index.query.functionscore.ScoreFunctionBuilders;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
import org.springframework.data.elasticsearch.core.query.SearchQuery;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

/**
 * @author dalaoyang
 * @Description
 * @project springboot_learn
 * @package com.dalaoyang.controller
 * @email [email protected]
 * @date 2018/5/4
 */
@RestController
public class GoodsController {

    @Autowired
    private GoodsRepository goodsRepository;

    //http://localhost:8888/save
    @GetMapping("save")
    public String save(){
        GoodsInfo goodsInfo = new GoodsInfo(System.currentTimeMillis(),
                "商品"+System.currentTimeMillis(),"這是一個測試商品");
        goodsRepository.save(goodsInfo);
        return "success";
    }

    //http://localhost:8888/delete?id=1525415333329
    @GetMapping("delete")
    public String delete(long id){
        goodsRepository.delete(id);
        return "success";
    }

    //http://localhost:8888/update?id=1525417362754&name=修改&description=修改
    @GetMapping("update")
    public String update(long id,String name,String description){
        GoodsInfo goodsInfo = new GoodsInfo(id,
                name,description);
        goodsRepository.save(goodsInfo);
        return "success";
    }

    //http://localhost:8888/getOne?id=1525417362754
    @GetMapping("getOne")
    public GoodsInfo getOne(long id){
        GoodsInfo goodsInfo = goodsRepository.findOne(id);
        return goodsInfo;
    }


    //每頁數量
    private Integer PAGESIZE=10;

    //http://localhost:8888/getGoodsList?query=商品
    //http://localhost:8888/getGoodsList?query=商品&pageNumber=1
    //根據關鍵字"商品"去查詢列表,name或者description包含的都查詢
    @GetMapping("getGoodsList")
    public List<GoodsInfo> getList(Integer pageNumber,String query){
        if(pageNumber==null) pageNumber = 0;
        //es搜尋預設第一頁頁碼是0
        SearchQuery searchQuery=getEntitySearchQuery(pageNumber,PAGESIZE,query);
        Page<GoodsInfo> goodsPage = goodsRepository.search(searchQuery);
        return goodsPage.getContent();
    }


    private SearchQuery getEntitySearchQuery(int pageNumber, int pageSize, String searchContent) {
        FunctionScoreQueryBuilder functionScoreQueryBuilder = QueryBuilders.functionScoreQuery()
                .add(QueryBuilders.matchPhraseQuery("name", searchContent),
                        ScoreFunctionBuilders.weightFactorFunction(100))
                .add(QueryBuilders.matchPhraseQuery("description", searchContent),
                        ScoreFunctionBuilders.weightFactorFunction(100))
                //設定權重分 求和模式
                .scoreMode("sum")
                //設定權重分最低分
                .setMinScore(10);

        // 設定分頁
        Pageable pageable = new PageRequest(pageNumber, pageSize);
        return new NativeSearchQueryBuilder()
                .withPageable(pageable)
                .withQuery(functionScoreQueryBuilder).build();
    }

}

啟動專案,先呼叫http://localhost:8888/save方法,插入幾條資料,然後去es管理頁面http://localhost:9200/_plugin/head/,如下圖