某马头条——day07

APP端搜索

搭建ES环境

docker pull elasticsearch:7.4.0

docker run -id --name elasticsearch -d --restart=always -p 9200:9200 -p 9300:9300 -v /usr/share/elasticsearch/plugins:/usr/share/elasticsearch/plugins -e "discovery.type=single-node" elasticsearch:7.4.0

配置中文分词器 ik

因为在创建elasticsearch容器的时候，映射了目录，所以可以在宿主机上进行配置ik中文分词器

在去选择ik分词器的时候，需要与elasticsearch的版本好对应上

把资料中的elasticsearch-analysis-ik-7.4.0.zip上传到服务器上,放到对应目录（plugins）解压

#切换目录
cd /usr/share/elasticsearch/plugins
#新建目录
mkdir analysis-ik
cd analysis-ik
#root根目录中拷贝文件
mv elasticsearch-analysis-ik-7.4.0.zip /usr/share/elasticsearch/plugins/analysis-ik
#解压文件
cd /usr/share/elasticsearch/plugins/analysis-ik
unzip elasticsearch-analysis-ik-7.4.0.zip

 重启docker出了点问题docker.socket: Failed with result ‘service-start-limit-hit‘._docker.socket: failed with result 'service-start-l-CSDN博客

成功后进行测试 

app端文章搜索

需求分析

http://192.168.200.130:9200/app_info_articleput请求 ：http://192.168.200.130:9200/app_info_article http://192.168.200.130:9200/app_info_article  

{
    "mappings":{
        "properties":{
            "id":{
                "type":"long"
            },
            "publishTime":{
                "type":"date"
            },
            "layout":{
                "type":"integer"
            },
            "images":{
                "type":"keyword",
                "index": false
            },
            "staticUrl":{
                "type":"keyword",
                "index": false
            },
            "authorId": {
                "type": "long"
            },
            "authorName": {
                "type": "text"
            },
            "title":{
                "type":"text",
                "analyzer":"ik_smart"
            },
            "content":{
                "type":"text",
                "analyzer":"ik_smart"
            }
        }
    }
}

GET请求查询映射：http://192.168.200.130:9200/app_info_article

DELETE请求，删除索引及映射：http://192.168.200.130:9200/app_info_article

GET请求，查询所有文档：http://192.168.200.130:9200/app_info_article/_search

数据初始化到索引库

 看文档导入工程进行数据导入

@SpringBootTest
@RunWith(SpringRunner.class)
public class ApArticleTest {

    @Autowired
    private ApArticleMapper apArticleMapper;

    @Autowired
    private RestHighLevelClient restHighLevelClient;
    /**
     * 注意：数据量的导入，如果数据量过大，需要分页导入
     * @throws Exception
     */
    @Test
    public void init() throws Exception {

        //1.查询所有符合条件的文章数据
        List searchArticleVos = apArticleMapper.loadArticleList();

        //2.批量导入到es索引库

        BulkRequest bulkRequest = new BulkRequest("app_info_article");

        for (SearchArticleVo searchArticleVo : searchArticleVos) {

            IndexRequest indexRequest = new IndexRequest().id(searchArticleVo.getId().toString())
                    .source(JSON.toJSONString(searchArticleVo), XContentType.JSON);

            //批量添加数据
            bulkRequest.add(indexRequest);

        }
        restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);

    }

}

测试通过

搜索微服务创建

导入给的工程到项目中

nacos配置中心leadnews-search

spring:
  autoconfigure:
    exclude: org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration
elasticsearch:
  host: 192.168.200.130
  port: 9200

功能实现

 接口定义

import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.search.dtos.UserSearchDto;
import com.heima.search.service.ArticleSearchService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.IOException;

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

    @Autowired
    private ArticleSearchService articleSearchService;

    @PostMapping("/search")
    public ResponseResult search(@RequestBody UserSearchDto dto) throws IOException {
        return articleSearchService.search(dto);
    }
}

UserSearchDto

import lombok.Data;

import java.util.Date;


@Data
public class UserSearchDto {

    /**
    * 搜索关键字
    */
    String searchWords;
    /**
    * 当前页
    */
    int pageNum;
    /**
    * 分页条数
    */
    int pageSize;
    /**
    * 最小时间
    */
    Date minBehotTime;

    public int getFromIndex(){
        if(this.pageNum<1)return 0;
        if(this.pageSize<1) this.pageSize = 10;
        return this.pageSize * (pageNum-1);
    }
}

业务层接口

package com.heima.search.service;

import com.heima.model.search.dtos.UserSearchDto;
import com.heima.model.common.dtos.ResponseResult;

import java.io.IOException;

public interface ArticleSearchService {

    /**
     ES文章分页搜索
     @return
     */
    ResponseResult search(UserSearchDto userSearchDto) throws IOException;
}

实现

import com.alibaba.fastjson.JSON;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.search.dtos.UserSearchDto;
import com.heima.model.user.pojos.ApUser;
import com.heima.search.service.ArticleSearchService;
import com.heima.utils.thread.AppThreadLocalUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.index.query.*;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.sort.SortOrder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

@Service
@Slf4j
public class ArticleSearchServiceImpl implements ArticleSearchService {

    @Autowired
    private RestHighLevelClient restHighLevelClient;

    /**
     * es文章分页检索
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult search(UserSearchDto dto) throws IOException {

        //1.检查参数
        if(dto == null || StringUtils.isBlank(dto.getSearchWords())){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        //2.设置查询条件
        SearchRequest searchRequest = new SearchRequest("app_info_article");
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();

        //布尔查询
        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();

        //关键字的分词之后查询
        QueryStringQueryBuilder queryStringQueryBuilder = QueryBuilders.queryStringQuery(dto.getSearchWords()).field("title").field("content").defaultOperator(Operator.OR);
        boolQueryBuilder.must(queryStringQueryBuilder);

        //查询小于mindate的数据
        RangeQueryBuilder rangeQueryBuilder = QueryBuilders.rangeQuery("publishTime").lt(dto.getMinBehotTime().getTime());
        boolQueryBuilder.filter(rangeQueryBuilder);

        //分页查询
        searchSourceBuilder.from(0);
        searchSourceBuilder.size(dto.getPageSize());

        //按照发布时间倒序查询
        searchSourceBuilder.sort("publishTime", SortOrder.DESC);

        //设置高亮  title
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        highlightBuilder.field("title");
        highlightBuilder.preTags("");
        highlightBuilder.postTags("");
        searchSourceBuilder.highlighter(highlightBuilder);


        searchSourceBuilder.query(boolQueryBuilder);
        searchRequest.source(searchSourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);


        //3.结果封装返回

        List

需要在app的网关中添加搜索微服务的路由配置

#搜索微服务
- id: leadnews-search
 uri: lb://leadnews-search
 predicates:
   - Path=/search/**
 filters:
   - StripPrefix= 1

启动项目进行测试，至少要启动文章微服务，用户微服务，搜索微服务，app网关微服务，app前端工程

新增文章添加同步

文章微服务发送消息  

1.把SearchArticleVo放到model工程下  

package com.heima.model.search.vos;

import lombok.Data;

import java.util.Date;

@Data
public class SearchArticleVo {

    // 文章id
    private Long id;
    // 文章标题
    private String title;
    // 文章发布时间
    private Date publishTime;
    // 文章布局
    private Integer layout;
    // 封面
    private String images;
    // 作者id
    private Long authorId;
    // 作者名词
    private String authorName;
    //静态url
    private String staticUrl;
    //文章内容
    private String content;

}

2.文章微服务的ArticleFreemarkerService中的buildArticleToMinIO方法中收集数据并发送消息

 

@Service
@Slf4j
@Transactional
public class ArticleFreemarkerServiceImpl implements ArticleFreemarkerService {
    ...
    /**
     * 生成静态文件上传到minIO中
     * @param apArticle
     * @param content
     */
    @Async
    @Override
    public void buildArticleToMinIO(ApArticle apArticle, String content) {
            ...

            //4.4 修改ap_article表，保存static_url字段
            apArticleService.update(Wrappers.lambdaUpdate().eq(ApArticle::getId,apArticle.getId())
                    .set(ApArticle::getStaticUrl,path));

            //发送消息，创建索引
            createArticleESIndex(apArticle,content,path);

        }
    }

    @Autowired
    private KafkaTemplate kafkaTemplate;

    /**
     * 送消息，创建索引
     * @param apArticle
     * @param content
     * @param path
     */
    private void createArticleESIndex(ApArticle apArticle, String content, String path) {
        SearchArticleVo vo = new SearchArticleVo();
        BeanUtils.copyProperties(apArticle,vo);
        vo.setContent(content);
        vo.setStaticUrl(path);

        kafkaTemplate.send(ArticleConstants.ARTICLE_ES_SYNC_TOPIC, JSON.toJSONString(vo));
    }

}

在ArticleConstants类中添加新的常量，完整代码如下

package com.heima.common.constants;

public class ArticleConstants {
    public static final Short LOADTYPE_LOAD_MORE = 1;
    public static final Short LOADTYPE_LOAD_NEW = 2;
    public static final String DEFAULT_TAG = "__all__";

    public static final String ARTICLE_ES_SYNC_TOPIC = "article.es.sync.topic";

    public static final Integer HOT_ARTICLE_LIKE_WEIGHT = 3;
    public static final Integer HOT_ARTICLE_COMMENT_WEIGHT = 5;
    public static final Integer HOT_ARTICLE_COLLECTION_WEIGHT = 8;

    public static final String HOT_ARTICLE_FIRST_PAGE = "hot_article_first_page_";
}

在文章微服务的nacos的配置中心添加如下配置

kafka:
    bootstrap-servers: 192.168.200.130:9092
    producer:
      retries: 10
      key-serializer: org.apache.kafka.common.serialization.StringSerializer
      value-serializer: org.apache.kafka.common.serialization.StringSerializer

搜索微服务接收消息并创建索引

1.搜索微服务中添加kafka的配置,nacos配置如下

spring:
  kafka:
    bootstrap-servers: 192.168.200.130:9092
    consumer:
      group-id: ${spring.application.name}
      key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
      value-deserializer: org.apache.kafka.common.serialization.StringDeserializer

2.定义监听接收消息,保存索引数据

@Component
@Slf4j
public class SyncArticleListener {

    @Autowired
    private RestHighLevelClient restHighLevelClient;

    @KafkaListener(topics = ArticleConstants.ARTICLE_ES_SYNC_TOPIC)
    public void onMessage(String message){
        if(StringUtils.isNotBlank(message)){

            log.info("SyncArticleListener,message={}",message);

            SearchArticleVo searchArticleVo = JSON.parseObject(message, SearchArticleVo.class);
            IndexRequest indexRequest = new IndexRequest("app_info_article");
            indexRequest.id(searchArticleVo.getId().toString());
            indexRequest.source(message, XContentType.JSON);
            try {
                restHighLevelClient.index(indexRequest, RequestOptions.DEFAULT);
            } catch (IOException e) {
                e.printStackTrace();
                log.error("sync es error={}",e);
            }
        }

    }
}

然后启动一堆微服务进行测试，tmd,加上云服务器，本地16g顶住了。

app端搜索历史记录

mongoDB环境搭建

docker pull mongo

docker run -di --name mongo-service --restart=always -p 27017:27017 -v ~/data/mongodata:/data mongo

使用本地连接链接mongo

springBoot集成MongoDB

第一：mongo依赖  

    org.springframework.boot
    spring-boot-starter-data-mongodb

第二：mongo配置

server:
  port: 9998
spring:
  data:
    mongodb:
      host: 192.168.200.130
      port: 27017
      database: leadnews-history

第三：映射

package com.itheima.mongo.pojo;

import lombok.Data;
import org.springframework.data.mongodb.core.mapping.Document;

import java.io.Serializable;
import java.util.Date;

/**
 * 

 * 联想词表
 * 
 *
 * @author itheima
 */
@Data
@Document("ap_associate_words")
public class ApAssociateWords implements Serializable {

    private static final long serialVersionUID = 1L;

    private String id;

    /**
     * 联想词
     */
    private String associateWords;

    /**
     * 创建时间
     */
    private Date createdTime;

}

@SpringBootTest(classes = MongoApplication.class)
@RunWith(SpringRunner.class)
public class MongoTest {


    @Autowired
    private MongoTemplate mongoTemplate;

    //保存
    @Test
    public void saveTest(){
        /*for (int i = 0; i < 10; i++) {
            ApAssociateWords apAssociateWords = new ApAssociateWords();
            apAssociateWords.setAssociateWords("黑马头条");
            apAssociateWords.setCreatedTime(new Date());
            mongoTemplate.save(apAssociateWords);
        }*/
        ApAssociateWords apAssociateWords = new ApAssociateWords();
        apAssociateWords.setAssociateWords("黑马直播");
        apAssociateWords.setCreatedTime(new Date());
        mongoTemplate.save(apAssociateWords);

    }

    //查询一个
    @Test
    public void saveFindOne(){
        ApAssociateWords apAssociateWords = mongoTemplate.findById("60bd973eb0c1d430a71a7928", ApAssociateWords.class);
        System.out.println(apAssociateWords);
    }

    //条件查询
    @Test
    public void testQuery(){
        Query query = Query.query(Criteria.where("associateWords").is("黑马头条"))
                .with(Sort.by(Sort.Direction.DESC,"createdTime"));
        List apAssociateWordsList = mongoTemplate.find(query, ApAssociateWords.class);
        System.out.println(apAssociateWordsList);
    }

    @Test
    public void testDel(){
        mongoTemplate.remove(Query.query(Criteria.where("associateWords").is("黑马头条")),ApAssociateWords.class);
    }
}

保存搜索记录

实现步骤

功能实现

1.搜索微服务集成mongodb

①：pom依赖导入

    org.springframework.boot
    spring-boot-starter-data-mongodb

②：nacos配置

spring:
  data:
   mongodb:
    host: 192.168.200.130
    port: 27017
    database: leadnews-history

③：在当天资料中找到对应的实体类拷贝到搜索微服务下

2.创建ApUserSearchService新增insert方法

public interface ApUserSearchService {

    /**
     * 保存用户搜索历史记录
     * @param keyword
     * @param userId
     */
    public void insert(String keyword,Integer userId);
}

实现类：

@Service
@Slf4j
public class ApUserSearchServiceImpl implements ApUserSearchService {

    @Autowired
    private MongoTemplate mongoTemplate;
    /**
     * 保存用户搜索历史记录
     * @param keyword
     * @param userId
     */
    @Override
    @Async
    public void insert(String keyword, Integer userId) {
        //1.查询当前用户的搜索关键词
        Query query = Query.query(Criteria.where("userId").is(userId).and("keyword").is(keyword));
        ApUserSearch apUserSearch = mongoTemplate.findOne(query, ApUserSearch.class);

        //2.存在 更新创建时间
        if(apUserSearch != null){
            apUserSearch.setCreatedTime(new Date());
            mongoTemplate.save(apUserSearch);
            return;
        }

        //3.不存在，判断当前历史记录总数量是否超过10
        apUserSearch = new ApUserSearch();
        apUserSearch.setUserId(userId);
        apUserSearch.setKeyword(keyword);
        apUserSearch.setCreatedTime(new Date());

        Query query1 = Query.query(Criteria.where("userId").is(userId));
        query1.with(Sort.by(Sort.Direction.DESC,"createdTime"));
        List apUserSearchList = mongoTemplate.find(query1, ApUserSearch.class);

        if(apUserSearchList == null || apUserSearchList.size() < 10){
            mongoTemplate.save(apUserSearch);
        }else {
            ApUserSearch lastUserSearch = apUserSearchList.get(apUserSearchList.size() - 1);
            mongoTemplate.findAndReplace(Query.query(Criteria.where("id").is(lastUserSearch.getId())),apUserSearch);
        }
    }
}

3.参考自媒体相关微服务，在搜索微服务中获取当前登录的用户

在app端的网关获取用户信息存到header中

//获取用户信息
            Object userId = claimsBody.get("id");

            //存储header中
            ServerHttpRequest serverHttpRequest = request.mutate().headers(httpHeaders -> {
                httpHeaders.add("userId", userId + "");
            }).build();
            //重置请求
            exchange.mutate().request(serverHttpRequest);

咋工具类加上一个新的

package com.heima.utils.thread;

import com.heima.model.user.pojos.ApUser;

public class AppThreadLocalUtil {

    private final static ThreadLocal WM_USER_THREAD_LOCAL = new ThreadLocal<>();

    //存入线程中
    public static void setUser(ApUser apUser){
        WM_USER_THREAD_LOCAL.set(apUser);
    }

    //从线程中获取
    public static ApUser getUser(){
        return WM_USER_THREAD_LOCAL.get();
    }

    //清理
    public static void clear(){
        WM_USER_THREAD_LOCAL.remove();
    }

}

 并在搜索微服务加上一个拦截器获取用户数据

package com.heima.search.interceptor;

import com.heima.model.user.pojos.ApUser;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.utils.thread.AppThreadLocalUtil;
import com.heima.utils.thread.WmThreadLocalUtil;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class AppTokenInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String userId = request.getHeader("userId");
        if(userId != null){
            //存入到当前线程中
            ApUser apUser = new ApUser();
            apUser.setId(Integer.valueOf(userId));
            AppThreadLocalUtil.setUser(apUser);
        }
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        AppThreadLocalUtil.clear();
    }
}

要让配置生效，需要注册到mvc配置中心

package com.heima.search.config;


import com.heima.search.interceptor.AppTokenInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class WebMvcConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new AppTokenInterceptor()).addPathPatterns("/**");
    }
}

4.在ArticleSearchService的search方法中调用保存历史记录

5.保存历史记录中开启异步调用，添加注解@Async

6.在搜索微服务引导类上开启异步调用

7.测试，搜索后查看结果

加载搜索历史

接口定义

/**
 * 

 * APP用户搜索信息表 前端控制器
 * 
 * @author itheima
 */
@Slf4j
@RestController
@RequestMapping("/api/v1/history")
public class ApUserSearchController{

    @Autowired
    private ApUserSearchService apUserSearchService;

    @PostMapping("/load")
    public ResponseResult findUserSearch() {
        return apUserSearchService.findUserSearch();
    }

}

在ApUserSearchService中新增方法  

/**
     查询搜索历史
     @return
     */
ResponseResult findUserSearch();

实现方法

 /**
     * 查询搜索历史
     *
     * @return
     */
@Override
public ResponseResult findUserSearch() {
    //获取当前用户
    ApUser user = AppThreadLocalUtil.getUser();
    if(user == null){
        return ResponseResult.errorResult(AppHttpCodeEnum.NEED_LOGIN);
    }

    //根据用户查询数据，按照时间倒序
    List apUserSearches = mongoTemplate.find(Query.query(Criteria.where("userId").is(user.getId())).with(Sort.by(Sort.Direction.DESC, "createdTime")), ApUserSearch.class);
    return ResponseResult.okResult(apUserSearches);
}

打开app的搜索页面，可以查看搜索记录列表

删除搜索历史

 在ApUserSearchController接口新增方法

@PostMapping("/del")
public ResponseResult delUserSearch(@RequestBody HistorySearchDto historySearchDto) {
    return apUserSearchService.delUserSearch(historySearchDto);
}

HistorySearchDto

@Data
public class HistorySearchDto {
    /**
    * 接收搜索历史记录id
    */
    String id;
}

在ApUserSearchService中新增方法

 /**
     删除搜索历史
     @param historySearchDto
     @return
     */
ResponseResult delUserSearch(HistorySearchDto historySearchDto);

实现

/**
     * 删除历史记录
     *
     * @param dto
     * @return
     */
@Override
public ResponseResult delUserSearch(HistorySearchDto dto) {
    //1.检查参数
    if(dto.getId() == null){
        return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
    }

    //2.判断是否登录
    ApUser user = AppThreadLocalUtil.getUser();
    if(user == null){
        return ResponseResult.errorResult(AppHttpCodeEnum.NEED_LOGIN);
    }

    //3.删除
    mongoTemplate.remove(Query.query(Criteria.where("userId").is(user.getId()).and("id").is(dto.getId())),ApUserSearch.class);
    return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
}

打开app可以删除搜索记录

搜索联想词功能

 

新建接口

package com.heima.search.controller.v1;

import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.search.dtos.UserSearchDto;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * 

 * 联想词表 前端控制器
 * 
 * @author itheima
 */
@Slf4j
@RestController
@RequestMapping("/api/v1/associate")
public class ApAssociateWordsController{

    @Autowired
    private ApAssociateWordsService apAssociateWordsService;

    @PostMapping("/search")
    public ResponseResult findAssociate(@RequestBody UserSearchDto userSearchDto) {
        return apAssociateWordsService.findAssociate(userSearchDto);
    }
}

新建联想词业务层接口

package com.heima.search.service;

import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.search.dtos.UserSearchDto;

/**
 * 

 * 联想词表 服务类
 * 
 *
 * @author itheima
 */
public interface ApAssociateWordsService {

    /**
     联想词
     @param userSearchDto
     @return
     */
    ResponseResult findAssociate(UserSearchDto userSearchDto);

}

实现类

import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.search.dtos.UserSearchDto;
import com.heima.search.pojos.ApAssociateWords;
import com.heima.search.service.ApAssociateWordsService;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * @Description:
 * @Version: V1.0
 */
@Service
public class ApAssociateWordsServiceImpl implements ApAssociateWordsService {

    @Autowired
    MongoTemplate mongoTemplate;

    /**
     * 联想词
     * @param userSearchDto
     * @return
     */
    @Override
    public ResponseResult findAssociate(UserSearchDto userSearchDto) {
        //1 参数检查
        if(userSearchDto == null || StringUtils.isBlank(userSearchDto.getSearchWords())){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //分页检查
        if (userSearchDto.getPageSize() > 20) {
            userSearchDto.setPageSize(20);
        }

        //3 执行查询 模糊查询
        Query query = Query.query(Criteria.where("associateWords").regex(".*?\\" + userSearchDto.getSearchWords() + ".*"));
        query.limit(userSearchDto.getPageSize());
        List wordsList = mongoTemplate.find(query, ApAssociateWords.class);

        return ResponseResult.okResult(wordsList);
    }
}

测试成功