SpringBoot集成elasticsearch使用(增删改查)
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SpringBoot集成elasticsearch使用(增删改查)
- 一、es是什么?
- 二、使用步骤
-
- 1.搭配环境
- springboot集成es
- 总结
-
- 1. NodeAvailableException[None of the configured nodes are availabl
-
- 配置文件正确写法:
- 2.批量删除自定义方法
一、es是什么?
Elasticsearch 是一个实时的分布式存储、搜索、分析的引擎。(全文引擎)
二、使用步骤
1.搭配环境
系统:windows 10
elasticsearch官网下载地址链接:
下载好对应的windows版本,解压到任意工作目录,es的安装非常方便,解压即用。
刚下载的es默认的分词器只能分解英文,对于中文不太友好。所以我们需要为es下载安装IK分词器
IK分词器下载链接:
Ik分词器下载地址,分词器下载跟es版本对应的就行。下载好后解压zip包
在你下载的es安装路径下的plugins文件夹下创建一个ik的文件夹,然后将上面解压出来的分词器内容复制到创建的ik文件夹下面。下面图ik分词器官方安装说明
ik分词器的安装就完成了,而后回答es根目录下的bin目录里,双击启动es
当es正常启动,且启动过程出现下面情况时,说明ik分词器已经正常安装好可以使用了
springboot集成es
1、新建springboot项目,引入相关版本依赖
这里用的elasticsearch 6.8 版本 导入
<parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.4.RELEASE</version></parent><!--springboot帮我们自动集成了es,所以只需要引入下面这一个依赖即可--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-elasticsearch</artifactId></dependency>
2.配置es.ym
server:port: 9007
spring:data:elasticsearch:cluster-name: my-applicationcluster-nodes: 127.0.0.1:9300
3. 在你的数据库实体类里每个字段加上相应的注解即可
@Document(indexName = "shop")
@Data
public class Goods {/* 商品id*/@Field(type = FieldType.Integer)//type表示存到es当中的数据类型private Integer id;/* 商品名字*/@Field(type = FieldType.Text,analyzer = "ik-max-word")private String productName;/* 商品描述*/@Field(type = FieldType.Text,analyzer = "ik-max-word")private String productDescription;/* 商品价格*/@Field(type = FieldType.Double)private Double productPrice;/* 商品分类id*/@Field(type = FieldType.Integer)private Integer categoryId;/* 商品图片*/@Field(type = FieldType.Text)private String productImage;/* 商品创建时间*/@Field(type = FieldType.Date,format = DateFormat.basic_date_time)private Date productCreateTime;/* 商品修改时间*/@Field(type = FieldType.Date,format = DateFormat.basic_date_time)private Date productUpdateTime;/* 商品状态(0:在销售,1:售空,2:下架)*/@Field(type = FieldType.Date,format = DateFormat.basic_date_time)private String productStatus;}
4. 操作es
由于spring官方对es的高度封装,我们已经可以做到像操作数据库一样操作es了
package org.springframework.data.elasticsearch.repository;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.Query;
import org.springframework.data.repository.NoRepositoryBean;
import org.springframework.data.repository.PagingAndSortingRepository;
import org.springframework.lang.Nullable;@NoRepositoryBean
public interface ElasticsearchRepository<T, ID> extends PagingAndSortingRepository<T, ID> {/ @deprecated */@Deprecateddefault <S extends T> S index(S entity) {return this.save(entity);}/ @deprecated */@Deprecated<S extends T> S indexWithoutRefresh(S entity);/ @deprecated */@DeprecatedIterable<T> search(QueryBuilder query);/ @deprecated */@DeprecatedPage<T> search(QueryBuilder query, Pageable pageable);/ @deprecated */Page<T> search(Query searchQuery);Page<T> searchSimilar(T entity, @Nullable String[] fields, Pageable pageable);/ @deprecated */@Deprecatedvoid refresh();
}
以上面的Goods对象举例,创建接口EsGoodsRepository,继承Spring封装的ElasticsearchRepository,ElasticsearchRepository提供了一些简单的操作es方法
创建EsGoodsRepository接口:
package com.buba.service;import com.buba.pojo.Goods;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;public interface EsGoodsRepository extends ElasticsearchRepository<Goods,Integer> {
}
保存或者更新时,先存db后操作es(增删改查+批量删除)。.
@RequestMapping("/goods")
@RestController
public class GoodsControoler{@Autowiredprivate GoodService goodService;@Autowiredprivate EsGoodsRepository esGoodsRepository;@Autowiredprivate EsGoodsService esGoodsService;@PostMapping("/add")@ApiOperation(value = "添加商品")public Result<Goods> save(@RequestBody Goods goods) {goods.setProductCreateTime(new Date());int i = goodService.insert(goods);if (i==1){// 调用EsGoodsRepository save 方法Goods save=esGoodsRepository.save(goods);return new Result(true, StatusCode.OK,"添加成功");}else {return new Result(true, StatusCode.ERROR,"添加失败");}}// 引用pagehelper写分页查询@GetMapping("/list")@ApiOperation(value = "查询商品列表")public Result list(@RequestParam(value = "pageNum", defaultValue = "1") int pageNum, @RequestParam(value = "pageSize", defaultValue = "10") int pageSize) {PageInfo<Goods> page = goodService.findAllUserByPageS(pageNum,pageSize);return new Result(true, StatusCode.OK, "查询成功", page);}@GetMapping("/searchGoods")@ApiOperation(value = "查询检索功能")public Result searchProduct(@RequestParam("productName") String productName,@RequestParam(value = "pageNum", defaultValue = "0") int pageNum, @RequestParam(value = "pageSize", defaultValue = "1") int pageSize){QueryBuilder queryBuilder = QueryBuilders.matchQuery("productName", productName);PageRequest pageRequest = PageRequest.of(pageNum, pageSize);Page<Goods> search = esGoodsRepository.search(queryBuilder, pageRequest);if (search != null){return new Result(true,StatusCode.OK,"商品展示成功",search);}return new Result(false,StatusCode.ERROR,"查询失败");}//根据id 删除商品@DeleteMapping("/delete")@ApiOperation(value = "删除商品")public Result delete(@RequestParam( "list") List<Integer> ids) {int i = goodService.deleteByPrimaryKey(ids);if (i >= 1) {esGoodsService.deleteByIds(ids);return new Result(true, StatusCode.OK, "删除成功");} else {return new Result(true, StatusCode.ERROR, "删除失败");}}//根据id修改商品@PutMapping("/update")@ApiOperation(value = "修改商品")public Result update(@RequestBody Goods goods) {int i = goodService.updateByPrimaryKeySelective(goods);if (i == 1) {esGoodsRepository.save(goods);return new Result(true, StatusCode.OK, "修改成功");}return new Result(true, StatusCode.ERROR, "修改失败");}
5.swagger +postman 测试
这里只测试了添加 其余自己测


总结
提示:这里对文章遇到报错总结::
1. NodeAvailableException[None of the configured nodes are availabl
原因是我们application.yaml配置文件出现了问题:
配置文件正确写法:
spring:data:elasticsearch:cluster-name: my-applicationcluster-nodes: 127.0.0.1:9300
可以看到这其中有两个配置:
cluster-name: my-application
cluster-nodes: 127.0.0.1:9300
① cluster-name
cluster-name的名字,在elasticsearch安装的config目录下的elasticsearch.yml文件中可以查看到,如果注释,则需要放开注释
②cluster-nodes
默认配置的9300才是对外开放的tcp端口,当然我们也可以通过配置去改变这个端口号。
2.批量删除自定义方法
Error creating bean with name ‘esGoodsRepository’: Invocation of init
method failed; nested exception is
org.springframework.data.mapping.PropertyReferenceException: No
property ids found for type Goods! Did you mean ‘id’?=
创建一个service 类
package com.buba.service;import org.springframework.stereotype.Service;import java.util.List;@Service
public interface EsGoodsService {void deleteByIds(List<Integer> ids);
}
在这里插入代码片
创建一个实现类(实现批量删除方法)
package com.buba.service;import com.buba.pojo.Goods;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;import java.util.ArrayList;
import java.util.List;@Service
public class EsGoodsRepositoryImpl implements EsGoodsService {@Autowiredprivate EsGoodsRepository esGoodsRepository;@Overridepublic void deleteByIds(List<Integer> ids) {if (!CollectionUtils.isEmpty(ids)) {List<Goods> esProductList = new ArrayList<>();for (Integer id : ids) {Goods goods = new Goods();goods.setId(id);esProductList.add(goods);}esGoodsRepository.deleteAll(esProductList);}}
}
controller 调用 service 方法来实现批量删除