SpringBoot2.0 整合 ElasticSearch框架,實現高性能搜索引擎

本文源碼
GitHub:知了一笑
https://github.com/cicadasmile/spring-boot-base

1、安裝和簡介

ElasticSearch是一個基於Lucene的搜索服務器。它提供了一個分佈式多用戶能力的全文搜索引擎,基於RESTful web接口。Elasticsearch是用Java開發的,並做爲Apache許可條款下的開放源碼發佈,是當前流行的企業級搜索引擎。html

搭建運行環境node

Linux系統:centos7下搭建ElasticSearch中間件,經常使用接口演示git

2、與SpringBoot2整合

一、核心依賴

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
    <version>${spring-boot.version}</version>
</dependency>

二、配置文件

spring:
  application:
    name: ware-elastic-search
  data:
    elasticsearch:
      # 默認 elasticsearch
      cluster-name: elasticsearch
      # 9200做爲Http協議,主要用於外部通信
      # 9300做爲Tcp協議,jar之間就是經過tcp協議通信
      cluster-nodes: 192.168.72.130:9300

三、實體類配置

Document 配置<br/>
加上了@Document註解以後,默認狀況下這個實體中全部的屬性都會被創建索引、而且分詞。<br/>
indexName索引名稱 理解爲數據庫名 限定小寫<br/>
type 理解爲數據庫的表名稱<br/>
shards = 5 默認分區數<br/>
replicas = 1 每一個分區默認的備份數<br/>
refreshInterval = "1s" 刷新間隔<br/>
indexStoreType = "fs" 索引文件存儲類型<br/>github

@Document(indexName = "requestlogindex",type = "requestlog")
public class RequestLog {
    //Id註解Elasticsearch裏相應於該列就是主鍵,查詢時可使用主鍵查詢
    @Id
    private Long id;
    private String orderNo;
    private String userId;
    private String userName;
    private String createTime;
}

四、數據交互層

實現ElasticsearchRepository接口。web

public interface RequestLogRepository 
extends ElasticsearchRepository<RequestLog,Long> {
}

五、演示案例

數據增長,修改,查詢,排序,多條件查詢。spring

@Service
public class RequestLogServiceImpl implements RequestLogService {
    @Resource
    private RequestLogRepository requestLogRepository ;
    @Override
    public String esInsert(Integer num) {
        for (int i = 0 ; i < num ; i++){
            RequestLog requestLog = new RequestLog() ;
            requestLog.setId(System.currentTimeMillis());
            requestLog.setOrderNo(DateUtil.formatDate(new Date(),DateUtil.DATE_FORMAT_02)+System.currentTimeMillis());
            requestLog.setUserId("userId"+i);
            requestLog.setUserName("張三"+i);
            requestLog.setCreateTime(DateUtil.formatDate(new Date(),DateUtil.DATE_FORMAT_01));
            requestLogRepository.save(requestLog) ;
        }
        return "success" ;
    }
    @Override
    public Iterable<RequestLog> esFindAll (){
        return requestLogRepository.findAll() ;
    }
    @Override
    public String esUpdateById(RequestLog requestLog) {
        requestLogRepository.save(requestLog);
        return "success" ;
    }
    @Override
    public Optional<RequestLog> esSelectById(Long id) {
        return requestLogRepository.findById(id) ;
    }
    @Override
    public Iterable<RequestLog> esFindOrder() {
        // 用戶名倒序
        // Sort sort = new Sort(Sort.Direction.DESC,"userName.keyword") ;
        // 建立時間正序
        Sort sort = new Sort(Sort.Direction.ASC,"createTime.keyword") ;
        return requestLogRepository.findAll(sort) ;
    }
    @Override
    public Iterable<RequestLog> esFindOrders() {
        List<Sort.Order> sortList = new ArrayList<>() ;
        Sort.Order sort1 = new Sort.Order(Sort.Direction.ASC,"createTime.keyword") ;
        Sort.Order sort2 = new Sort.Order(Sort.Direction.DESC,"userName.keyword") ;
        sortList.add(sort1) ;
        sortList.add(sort2) ;
        Sort orders = Sort.by(sortList) ;
        return requestLogRepository.findAll(orders) ;
    }
    @Override
    public Iterable<RequestLog> search() {
        // 全文搜索關鍵字
        /*
        String queryString="張三";
        QueryStringQueryBuilder builder = new QueryStringQueryBuilder(queryString);
        requestLogRepository.search(builder) ;
        */
        /*
         * 多條件查詢
         */
         QueryBuilder builder = QueryBuilders.boolQuery()
                // .must(QueryBuilders.matchQuery("userName.keyword", "歷張")) 搜索不到
               .must(QueryBuilders.matchQuery("userName", "張三")) // 能夠搜索
               .must(QueryBuilders.matchQuery("orderNo", "20190613736278243"));
        return requestLogRepository.search(builder) ;
    }
}

3、源代碼地址

GitHub地址:知了一笑
https://github.com/cicadasmile
碼雲地址:知了一笑
https://gitee.com/cicadasmile


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