Spring Boot+Elasticsearch实现简单全文搜索

elasticsearchElasticSearch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。spring boot操作elasticsearch需要通过spring data elasticsearch来实现添加依赖：

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

实现效果：

微信截图_20180521120057.png

实体类：

package com.example.demo.entity;import org.springframework.data.annotation.Id;import org.springframework.data.elasticsearch.annotations.document;//定义索引名字及类型@document(indexName = "poem",type = "poem",shards = 1, replicas = 0)public class Poem {    @Id
    private long id;    private String title;    private String content;    public Poem(long id, String title, String content) {        this.id = id;        this.title = title;        this.content = content;
    }    public Poem(String title, String content) {        this.title = title;        this.content = content;
    }    public Poem() {
    }    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;
    }    public String getContent() {        return content;
    }    public void setContent(String content) {        this.content = content;
    }
}

dao层

package com.example.demo.repository;import com.example.demo.entity.Poem;import org.springframework.data.domain.Page;import org.springframework.data.domain.Pageable;import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;public interface PoemRepository extends ElasticsearchRepository{    Page findByTitleLikeOrContentLike(String title, String content, Pageable pageable);    Page findByContentLike(String content,Pageable pageable);

}

只需要继承ElasticsearchRepository即可，与JpaRepository相似，里面封装好了基本的CRUD操作方法。

ElasticsearchRepository源码：

//// Source code recreated from a .class file by IntelliJ IDEA// (powered by Fernflower decompiler)//package org.springframework.data.elasticsearch.repository;import java.io.Serializable;import org.elasticsearch.index.query.QueryBuilder;import org.springframework.data.domain.Page;import org.springframework.data.domain.Pageable;import org.springframework.data.elasticsearch.core.query.SearchQuery;import org.springframework.data.elasticsearch.repository.ElasticsearchCrudRepository;import org.springframework.data.repository.NoRepositoryBean;@NoRepositoryBeanpublic interface ElasticsearchRepository extends ElasticsearchCrudRepository {
     S index(S var1);    Iterable search(QueryBuilder var1);    Page search(QueryBuilder var1, Pageable var2);    Page search(SearchQuery var1);    Page searchSimilar(T var1, String[] var2, Pageable var3);    void refresh();    Class getEntityClass();
}

业务逻辑接口：

package com.example.demo.service;import com.example.demo.entity.Poem;import org.springframework.data.domain.Page;import org.springframework.data.domain.Pageable;public interface PoemService {   //保存Poem实体
   void save (Poem poem);   //基于title和content进行搜索，返回分页
   Page search(String title, String content, Pageable pageable);   //基于content进行搜索，返回分页
   Page search(String content,Pageable pageable);   //返回所有数据集合
   Page findAll(Pageable pageable);
}

业务逻辑实现类：

package com.example.demo.service;import com.example.demo.entity.Poem;import com.example.demo.repository.PoemRepository;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.data.domain.Page;import org.springframework.data.domain.Pageable;import org.springframework.stereotype.Service;@Servicepublic class PoemServiceImpl implements PoemService{

    @Autowired
    private PoemRepository poemRepository;

    @Override
    public void save(Poem poem) {        poemRepository.save(poem);
    }

    @Override
    public Page search(String title, String content, Pageable pageable) {        return poemRepository.findByTitleLikeOrContentLike(title,content,pageable);
    }

    @Override
    public Page search(String content, Pageable pageable) {        return poemRepository.findByContentLike(content,pageable);
    }

    @Override
    public Page findAll(Pageable pageable) {        return poemRepository.findAll(pageable);
    }
}

Controller层：

package com.example.demo.controller;import com.example.demo.entity.Poem;import com.example.demo.service.PoemServiceImpl;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.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import java.util.ArrayList;import java.util.List;@Controllerpublic class WebController {    @Autowired
    private PoemServiceImpl poemService;//    @RequestMapping("/")//    public String index(){//        List poems = new ArrayList<>();//        poems.add(new Poem(4,"湘春夜月·近清明","近清明,翠禽枝上消魂,可惜一片清歌，都付与黄昏。欲共柳花低诉，怕柳花轻薄，不解伤春。念楚乡旅宿，柔情别绪，谁与温存。"));//        poems.add(new Poem(5,"卜算子·不是爱风尘","不是爱风尘，似被前缘误。花落花开自有时，总赖东君主。n" +//                "去也终须去，住也如何住！若得山花插满头，莫问奴归处"));//        poems.add(new Poem(6,"御街行·秋日怀旧","纷纷坠叶飘香砌。夜寂静，寒声碎。真珠帘卷玉楼空，天淡银河垂地。年年今夜，月华如练，长是人千里。"));////        for(int i=0;i poems = poemService.findAll(pageable);
        List poems1 = poems.getContent();
        model.addAttribute("poems",poems);        return "/index";
    }    @RequestMapping("/t")    public String index2(@RequestParam(value="content",required=false,defaultValue="香") String content,
                         @RequestParam(value="pageIndex",required=false,defaultValue="0") int pageIndex,
                         @RequestParam(value="pageSize",required=false,defaultValue="10") int pageSize,
                         Model model) {
        Pageable pageable = new PageRequest(pageIndex,pageSize);
        Page poems = poemService.search(content,pageable);
        List list = poems.getContent();
        model.addAttribute("poems",list);        return "/t";
    }    @RequestMapping("/search")    public String search(String content, @RequestParam(value="pageIndex",required=false,defaultValue="0") int pageIndex,
                         @RequestParam(value="pageSize",required=false,defaultValue="10") int pageSize,Model model) {
                Pageable pageable = new PageRequest(pageIndex,pageSize);
                Page poems = poemService.search(content,pageable);
                List list = poems.getContent();
                model.addAttribute("poems",list);                return "/list";

    }



}

配置文件：

#存储索引的位置#spring.data.elasticsearch.properties.path.home=target/elastic#连接超时的时间#server.port=8081spring.data.elasticsearch.properties.transport.tcp.connect_timeout=120s
spring.data.elasticsearch.repositories.enabled=truespring.data.elasticsearch.cluster-nodes=localhost:9300 //连接本地elasticsearch

作者：Cool_Pomelo
链接：https://www.jianshu.com/p/29944f3e9f95