此文适合了解了es相关概念以及基础知识的同学阅读
提示:以下是本篇文章正文内容,下面案例可供参考
Elasticsearch 是一个实时的分布式存储、搜索、分析的引擎。(全文引擎)
系统:windows 10
elasticsearch官网下载地址
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:
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
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


这里用的elasticsearch 6.8 版本 导入
org.springframework.boot spring-boot-starter-parent2.1.4.RELEASE org.springframework.boot spring-boot-starter-data-elasticsearch
server:
  port: 9007
spring:
  data:
    elasticsearch:
      cluster-name: my-application
      cluster-nodes: 127.0.0.1:9300
 
@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;
}
 
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 ElasticsearchRepositoryextends PagingAndSortingRepository { /** @deprecated */ @Deprecated default S index(S entity) { return this.save(entity); } /** @deprecated */ @DeprecatedS indexWithoutRefresh(S entity); /** @deprecated */ @Deprecated Iterablesearch(QueryBuilder query); /** @deprecated */ @Deprecated Page search(QueryBuilder query, Pageable pageable); /** @deprecated */ Page search(Query searchQuery); Page searchSimilar(T entity, @Nullable String[] fields, Pageable pageable); /** @deprecated */ @Deprecated void 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{ } 
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{
    @Autowired
    private GoodService goodService;
    @Autowired
    private EsGoodsRepository esGoodsRepository;
    @Autowired
    private EsGoodsService esGoodsService;
    @PostMapping("/add")
    @ApiOperation(value = "添加商品")
    public Result 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 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 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 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");
    }
     
这里只测试了添加 其余自己测



提示:这里对文章遇到报错总结:

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-application
      cluster-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
SpringDataElasticsearch底层使用的不是Elasticsearch提供的RestHighLevelClient,而是TransportClient,并不采用Http协议通信,而是访问elasticsearch对外开放的tcp端口
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
SpringDataElasticsearch底层使用的不是Elasticsearch提供的RestHighLevelClient,而是TransportClient,并不采用Http协议通信,而是访问elasticsearch对外开放的tcp端口

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。
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 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 {
    @Autowired
    private EsGoodsRepository esGoodsRepository;
    @Override
    public void deleteByIds(List ids) {
        if (!CollectionUtils.isEmpty(ids)) {
            List 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