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全文檢索ElasticSearch與Springboot集成實(shí)例

全文檢索
1.全文搜索概念:
(1)數(shù)據(jù)結(jié)構(gòu):
·結(jié)構(gòu)化:只具有固定格式或者有限長度的數(shù)據(jù),如數(shù)據(jù)庫,元數(shù)據(jù)等
·非結(jié)構(gòu)化:指不定長或者無固定格式的數(shù)據(jù),如郵件,word文檔等
(2)非結(jié)構(gòu)化數(shù)據(jù)的檢索:
·順序掃描法:適合小數(shù)據(jù)量文件
·全文搜索:將非結(jié)構(gòu)化的數(shù)據(jù)轉(zhuǎn)為結(jié)構(gòu)化的數(shù)據(jù),然后創(chuàng)建索引,在進(jìn)行搜索
(3)概念:全文搜索是一種將文件中所有文本域搜索項(xiàng)匹配的文件資料檢索方式
2.全文搜索實(shí)現(xiàn)原理
全文檢索ElasticSearch與Spring boot集成實(shí)例
3.全文搜索實(shí)現(xiàn)技術(shù):基于java的開源實(shí)現(xiàn)Lucene,ElasticSearch(具有自身的分布式管理功能),Solr
4.ElasticSearch簡介:
概念:
(1)高度可擴(kuò)展的開源全文搜索和分析引擎
(2)快速的,近實(shí)的多大數(shù)據(jù)進(jìn)行存儲,搜索和分析
(3)用來支撐有復(fù)雜的數(shù)據(jù)搜索需求的企業(yè)級應(yīng)用
特點(diǎn)及介紹:
(1)分布式
(2)高可用
(3)對類型,支持多種數(shù)據(jù)類型
(4)多API
(5)面向文檔
(6)異不寫入
(7)近實(shí)時:每隔n秒查詢,在寫入磁盤中
(8)基于Lucene
(9)Apache協(xié)議
5.ElasticSearch與Spring Boot集成
(1)配置環(huán)境:ElasticSearch,Spring Data ElasticSearch,JNA
(2)安裝ElasticSearch,下載包,解壓直接啟動即可,這里特別說一下ElasticSearch的一些異常問題,必須版本對應(yīng),其次端口問題一定要注意
(3)建立Spring Boot項(xiàng)目
(4)我們修改pom.xml文件,將相關(guān)依賴加進(jìn)去
(5)在項(xiàng)目代碼編寫之前我們必須在本地安裝ElasticSearch并在版本上與Spring Boot版本相兼容,其次注意端口號的問題,集成時ElasticSearch服務(wù)的端口號為9200,而客戶端端口號為9300
接下來我們啟動本地安裝的ElasticSearch然后在啟動我們的項(xiàng)目:

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    4.0.0

    com.dhtt.spring.boot.blog
    spring.data.action
    0.0.1-SNAPSHOT
    jar

    spring.data.action
    Demo project for Spring Boot

    
        org.springframework.boot
        spring-boot-starter-parent
        2.1.0.RELEASE
         
    

    
        UTF-8
        UTF-8
        1.8
    

    
        
            org.springframework.boot
            spring-boot-starter-data-jpa
        
        
        
            org.springframework.boot
            spring-boot-starter-data-elasticsearch
        

        
            org.springframework.data
            spring-data-elasticsearch
        
        
            org.springframework.boot
            spring-boot-starter-thymeleaf
        
        
            org.springframework.boot
            spring-boot-starter-web
        
        
        
            org.springframework.boot
            spring-boot-devtools
        
        
            org.springframework.boot
            spring-boot-starter-test
            test
        
        
        
            net.java.dev.jna
            jna
            4.5.1
        

        
            org.elasticsearch
            elasticsearch
        
        
        

        
        
            mysql
            mysql-connector-java
            5.1.46
        
        
        
            org.hibernate
            hibernate-core
            5.3.7.Final
        
    

    
        
            
                org.springframework.boot
                spring-boot-maven-plugin
            
        
    


啟動項(xiàng)目進(jìn)行測試,觀察項(xiàng)目各項(xiàng)配置是否正確,項(xiàng)目能否成功啟動,項(xiàng)目啟動成功后
(5)接下來配置application.properties文件:

#thymeleaf配置
spring.thymeleaf.encoding=UTF-8
#熱部署靜態(tài)文件,不需要緩存,實(shí)時觀察文件修改效果
spring.thymeleaf.cache=false
#使用html5標(biāo)準(zhǔn)
spring.thymeleaf.mode=HTML5
spring.thymeleaf.suffix=.html
spring.resources.chain.strategy.content.enabled=true

#elasticsearch服務(wù)器地址
spring.data.elasticsearch.cluster-nodes=127.0.0.1:9300
#連接超時時間
spring.data.elasticsearch.properties.transport.tcp.connect_timeout=120s
 #節(jié)點(diǎn)名字,默認(rèn)elasticsearch
#spring.data.elasticsearch.cluster-name=elasticsearch 
#spring.data.elasticsearch.repositories.enable=true
#spring.data.elasticsearch.properties.path.logs=./elasticsearch/log
#spring.data.elasticsearch.properties.path.data=./elasticsearch/data

#數(shù)據(jù)庫連接配置
spring.datasource.url=jdbc:mysql://localhost:3306/blog_test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8&useSSL=false
spring.datasource.username=root
spring.datasource.password=qitao1996
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

#jpa配置
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=create-drop

(6)進(jìn)行后臺編碼:
文檔類EsBlog:

package com.dhtt.spring.boot.blog.spring.data.action.entity;

import java.io.Serializable;

import javax.persistence.Id;

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

/**
 * EsBlog實(shí)體(文檔)類
 * 
 * @author QiTao
 *
 */
@Document(indexName="blog",type="blog")   //指定文檔
public class EsBlog implements Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 4745983033416635193L;
    @Id
    private String id;
    private String title;
    private String summary;
    private String content;

    protected EsBlog() {
        super();
    }

    public EsBlog(String title, String summary, String content) {
        super();
        this.title = title;
        this.summary = summary;
        this.content = content;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getSummary() {
        return summary;
    }

    public void setSummary(String summary) {
        this.summary = summary;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

    @Override
    public String toString() {
        return "EsBlog [id=" + id + ", title=" + title + ", summary=" + summary + ", content=" + content + "]";
    }

}

資源庫,定義數(shù)據(jù)查詢接口:

package com.dhtt.spring.boot.blog.spring.data.action.repository;

import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;

import com.dhtt.spring.boot.blog.spring.data.action.entity.EsBlog;

/**
 * EsBlogRepository接口
 * 
 * @author QiTao
 *
 */
public interface EsBlogRepository extends ElasticsearchRepository {
    /**
     * 分頁,查詢,去重
     * 
     * @param title
     * @param summary
     * @param content
     * @param pageable
     * @return
     */
    Page findDistinctEsBlogByTitleContainingOrSummaryContainingOrContentContaining(String title, String summary,
            String content, PageRequest pageRequest);
}

最后編寫Controller類:

package com.dhtt.spring.boot.blog.spring.data.action.web.user;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import com.dhtt.spring.boot.blog.spring.data.action.entity.EsBlog;
import com.dhtt.spring.boot.blog.spring.data.action.repository.EsBlogRepository;

@RestController
@RequestMapping("/blogs")
public class BlogController {
    @Autowired
    private EsBlogRepository esBlogRepository;

    @GetMapping
    public List list(@RequestParam(value = "title") String title,
            @RequestParam(value = "summary") String summary, 
            @RequestParam(value = "content") String content,
            @RequestParam(value = "pageIndex", defaultValue = "0") int pageIndex,
            @RequestParam(value = "pageSize", defaultValue = "10") int pageSize) {
        //添加測試數(shù)據(jù)
        esBlogRepository.deleteAll();
        esBlogRepository.save(new EsBlog("登黃鶴樓", "王之渙的等黃鶴樓", "百日依山盡,黃河入海流,欲窮千里目,更上一層樓"));
        esBlogRepository.save(new EsBlog("相思", "王維的相思", "紅豆生南國,春來發(fā)幾枝,愿君多采截,此物最相思"));
        esBlogRepository.save(new EsBlog("靜夜思", "李白的靜夜思", "床前明月光,疑是地上霜,舉頭望明月,低頭思故鄉(xiāng)"));
        //查詢獲取
        PageRequest pageRequest=PageRequest.of(pageIndex,pageSize);
        Page page= esBlogRepository.findDistinctEsBlogByTitleContainingOrSummaryContainingOrContentContaining(title, summary, content, pageRequest);
        return page.getContent();

    }

}

啟動項(xiàng)目,前臺進(jìn)行訪問:
全文檢索ElasticSearch與Spring boot集成實(shí)例

前臺結(jié)果打印成功,故我們的Elasticsearch+Spring Boot集成成功


本文名稱:全文檢索ElasticSearch與Springboot集成實(shí)例
轉(zhuǎn)載來源:http://weahome.cn/article/jececg.html

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