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本文介绍了如何整合搜索引擎elasticsearch与springboot,对外提供数据查询接口。
我的个人网站需要对mysql数据库内存储的京东商品进行模糊查询(模仿淘宝商品搜索),所以选择了将数据导入elasticsearch随后使用他来进行关键词查询。前端只需发送用户搜索的关键词和分页参数(可选),即可返回商品数据(json格式)
组件介绍:
本文测试环境:
sudo docker run -it --rm --name elasticsearch -d -p 9200:9200 -p 9300:9300 elasticsearch:2.3.5
注意到该命令:
得到如图:
此时打开网页localhost:9200即可查看状态,显示类似为:
{
"name" : "Ant-Man",
"cluster_name" : "elasticsearch",
"version" : {
"number" : "2.3.5",
"build_hash" : "90f439ff60a3c0f497f91663701e64ccd01edbb4",
"build_timestamp" : "2016-07-27T10:36:52Z",
"build_snapshot" : false,
"lucene_version" : "5.5.0"
},
"tagline" : "You Know, for Search"
}
注意:docker的es默认对0.0.0.0公网开放
本文中要导入的是pm_backend下的表pm_jd_item内的全部京东商品数据
详细步骤参考:
http://blog.codecp.org/2018/04/16/Elasticsearch%E4%B9%8B%E4%BD%BF%E7%94%A8Logstash%E5%AF%BC%E5%85%A5Mysql%E6%95%B0%E6%8D%AE/
最终编写的jdbc.conf为:
schedule => "* * * * *"
默认为每分钟同步一次
input { jdbc { jdbc_connection_string => "jdbc:mysql://localhost:3306/pm_backend" jdbc_user => "root" jdbc_password => "xxxxxxxxxx" jdbc_driver_library => "xxxxxxxx/mysql-connector-java-5.1.6.jar" jdbc_driver_class => "com.mysql.jdbc.Driver" jdbc_paging_enabled => "true" jdbc_page_size => "5000" statement=> "select * from pm_jd_item" schedule => "* * * * *" type => "pm_jd_item" } } output { elasticsearch { hosts => "localhost:9200" index => "pm_backend" document_type => "%{type}" document_id => "%{id}" } stdout { codec => json_lines } }
在logstash目录下执行命令,完成数据的导入:
bin/logstash -f jdbc.conf
得到如图:
同步完成后,使用elasticsearch-head查看(或者用kibana,请随意):
<!-- 搜索引擎:elastic-search-->
<dependency>
<groupId>org.elasticsearch</groupId>
<artifactId>elasticsearch</artifactId>
<version>2.4.6</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-elasticsearch</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-elasticsearch</artifactId>
</dependency>
# elasticsearch
spring.data.elasticsearch.cluster-name=elasticsearch
#节点地址,多个节点用逗号隔开
spring.data.elasticsearch.cluster-nodes=127.0.0.1:9300
#spring.data.elasticsearch.local=false
spring.data.elasticsearch.repositories.enable=true
@Document(indexName = "pm_backend", type = "pm_jd_item")
public class JdItem implements Serializable {
@Id
private Integer id;
@Field(type = FieldType.Long)
private Long itemId;
@Field(type = FieldType.Long)
private Long categoryId;
@Field(type = FieldType.String)
private String name;
public interface JdItemRepository extends ElasticsearchRepository<JdItem, Integer>{
}
代码截取自个人项目京东价格监控,仅供参考!
/** * 根据商品名在pm_jd_item中搜索商品 * @param itemName * @param startRow * @param pageSize * @return */ @ApiOperation(value="查询商品", notes="查询商品") @RequestMapping(value = "/findJdItemByName", method = {RequestMethod.GET}) public ResponseData<List<JdItem>> findJdItemByName( @ApiParam("用户输入的商品名") @RequestParam(value = "itemName") String itemName, @ApiParam("页码索引(默认为0)") @RequestParam(value = "startRow", required = false, defaultValue = "0") int startRow, @ApiParam("每页的商品数量(默认为10)") @RequestParam(value = "pageSize", required = false, defaultValue = "10") int pageSize ){ ResponseData<List<JdItem>> responseData = new ResponseData<>(); try { FunctionScoreQueryBuilder functionScoreQueryBuilder = QueryBuilders.functionScoreQuery().add(QueryBuilders.matchPhraseQuery("name", itemName), ScoreFunctionBuilders.weightFactorFunction(100)).scoreMode("sum").setMinScore(10); Pageable pageable = new PageRequest(startRow, pageSize); SearchQuery searchQuery = new NativeSearchQueryBuilder().withPageable(pageable).withQuery(functionScoreQueryBuilder).build(); Page<JdItem> jdItems = jdItemRepository.search(searchQuery); // Page分页getTotalPages()返回了应有的页数,临时放在errorMsg传给前端 responseData.jsonFill(1, String.valueOf(jdItems.getTotalPages()), jdItems.getContent()); } catch (Exception e) { e.printStackTrace(); responseData.jsonFill(2, e.getMessage(), null); } return responseData; } }
调用findJdItemByName接口,得到:
请参考:https://github.com/medcl/elasticsearch-analysis-ik
Docker安装ES & Kibana:
https://www.jianshu.com/p/fdfead5acc23
Elasticsearch之使用Logstash导入Mysql数据:
http://blog.codecp.org/2018/04/16/Elasticsearch%E4%B9%8B%E4%BD%BF%E7%94%A8Logstash%E5%AF%BC%E5%85%A5Mysql%E6%95%B0%E6%8D%AE/
我是蛮三刀把刀,后端开发。主要关注后端开发,数据安全,爬虫等方向。
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