SpringBoot2.x整合elasticsearch5.6.x

1、添加maven依赖
           <dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
   </dependency>

2、接口继承ElasticSearchRepository,里面有很多默认实现
           注意点：
                索引名称记得小写，类属性名称也要小写
            新建实体对象article
            加上类注解 @Document(indexName = "blog", type = "article")

package net.xdclass.base_project.repository;

import net.xdclass.base_project.domain.Article;

import org.springframework.data.elasticsearch.annotations.Document;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Repository;

@Component
//@Repository
public interface ArticleRepository extends ElasticsearchRepository<Article, Long> {

}

实体类

@Document(indexName = "blog", type = "article")
public class Article implements Serializable{


   /**
   *
   */
   private static final long serialVersionUID = 1L;

   private long id;

   private String title;

   private String summary;

   private String content;

   private int pv;

   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 getSummary() {
       return summary;
   }

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

   public String getContent() {
       return content;
   }

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

   public int getPv() {
       return pv;
   }

   public void setPv(int pv) {
       this.pv = pv;
   }

}

   3、配置文件：
            # ELASTICSEARCH (ElasticsearchProperties)
           spring.data.elasticsearch.cluster-name=elasticsearch # Elasticsearch cluster name.
           spring.data.elasticsearch.cluster-nodes=localhost:9300 # Comma-separated list of cluster node addresses.
           spring.data.elasticsearch.repositories.enabled=true # Whether to enable Elasticsearch repositories.

4.具体controller使用

package net.xdclass.base_project.controller;

import net.xdclass.base_project.domain.Article;
import net.xdclass.base_project.domain.JsonData;
import net.xdclass.base_project.repository.ArticleRepository;

import org.elasticsearch.index.query.QueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/api/v1/article")
public class ArticleController {

   @Autowired
   private ArticleRepository articleRepository;

   @GetMapping("save")
   public Object save(long id,String title){

       Article article = new Article();
       article.setId(id);
       article.setPv(123);
       article.setContent("springboot整合elasticsearch，这个是新版本 2018年录制");
       article.setTitle(title);
       article.setSummary("搜索框架整合");

       articleRepository.save(article);

       return JsonData.buildSuccess();
   }




   @GetMapping("search")
   public Object search(String title){

//QueryBuilder queryBuilder = QueryBuilders.matchAllQuery(); //搜索全部文档
QueryBuilder queryBuilder = QueryBuilders.matchQuery("title", title);

       Iterable<Article> list = articleRepository.search(queryBuilder);

       return JsonData.buildSuccess(list);
   }

}

4、查看es数据

           查看索引信息：http://localhost:9200/_cat/indices?v
           查看某个索引库结构：http://localhost:9200/blog
           查看某个对象：http://localhost:9200/blog/article/1

elasticSearch主要特点

       1、特点：全文检索，结构化检索，数据统计、分析，接近实时处理，分布式搜索(可部署数百台服务器)，处理PB级别的数据
           搜索纠错，自动完成
       2、使用场景：日志搜索，数据聚合，数据监控，报表统计分析

       3、国内外使用者：维基百科，Stack Overflow，GitHub

与mysql相似：

mysql：database table rocord
es : index type（只能存在一个) document

SpringBoot2.x整合elasticsearch5.6.x

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