Elasticsearch的关键词搜索

最新推荐文章于 2025-03-27 00:15:39 发布

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最新推荐文章于 2025-03-27 00:15:39 发布

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分类专栏：笔记文章标签： elasticsearch java

本文链接：https://blog.youkuaiyun.com/qq_44361270/article/details/124609939

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这是一个关于使用Elasticsearch进行关键词搜索和分页查询的示例。通过创建`RequestParamDoc`、`RequestParam`和`RequestParams`等实体类，实现了从前端接收搜索参数，通过`WayController`调用`WayService`进行ES查询。服务层使用`RestHighLevelClient`建立连接，构造查询条件，并进行高亮显示。搜索结果以`PageResult`返回，包含总条数和数据列表。

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返回给前端的实体类

@Data
@AllArgsConstructor
@NoArgsConstructor
public class PageResult {

    private Long total;
    private List<RequestParamDoc> tkyb;

}

/*
* 前端的集合类
* */
@Data
@NoArgsConstructor
public class RequestParamDoc {
    private  float score;
    private String gsbh;
    private String gsmc;
    private String zcd;
    private String gljg;
    private String gxxl;
    private String sss;
    private String ssj;
    private String gsjc;



    public RequestParamDoc(RequestParam requestParam) {

        this.score = requestParam.getScore();
        this.gsbh = requestParam.getGsbh();
        this.gsmc = requestParam.getGsmc();
        this.zcd=requestParam.getZcd();
        this.gljg = requestParam.getGljg();
        this.gxxl = requestParam.getGxxl();
        this.sss = requestParam.getSss();
        this.ssj = requestParam.getSsj();
        this.gsjc = requestParam.getGsjc();

    }
}

es对应的实体类

/**
 *es对应的实体类
 */
@Data
public class RequestParam {

    private String gsbh;
    private String gsmc;
    private String zcd;
    private String gljg;
    private String gxxl;
    private String sss;
    private String gsjc;
    private String ssj;
    private float score;


}

前端传递的搜索参数实体类

@Data
public class RequestParams {

    private String key; //可以里面包含的是分词的所有字段
    private Integer page;
    private Integer size;



}

controller层

@RestController
public class WayController {

    @Autowired
    private IWayService wayService;

    /**
     * 关键词搜索
     * @param params
     * @return
     */
    @PostMapping("/way/list")
    public PageResult search(@RequestBody RequestParams params){

        return wayService.search(params);

    }
}

service层接口

public interface IWayService{
    /**
     * 关键词分页查询
     *
     */
    PageResult search(RequestParams params);
}

service实现类

@Slf4j
@Service
public class WayService implements IWayService  {



    @Autowired
    private RestHighLevelClient client;

    /**
     * 关键词分页查询
     *
     * @param params
     * @return
     */
    @Override
    public PageResult search(RequestParams params) {

        //获取关键词
        String key = params.getKey();

        //创建索引库的链接
        SearchRequest searchRequest = new SearchRequest("hzgs_fgb_gsxx");

        //创建查询条件
        SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();

        //创建bool查询
        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();

        //用公司名称跟路线名称
        if (StringUtils.isBlank(key)) {

            boolQueryBuilder.must(QueryBuilders.matchAllQuery());

        } else {

            boolQueryBuilder.must(QueryBuilders.multiMatchQuery("gsmc", key, "gxxl", key));

        }

        // 设置搜索条件
        searchSourceBuilder.query(boolQueryBuilder);

        //进行分页设置
        searchSourceBuilder.from(params.getPage());
        searchSourceBuilder.size(params.getSize());


        searchRequest.source(searchSourceBuilder);


        // 增加高亮查询
        HighlightBuilder highlightBuilder = new HighlightBuilder();

        // 设置高亮条件
        highlightBuilder.preTags("<span>");
        highlightBuilder.field("gsmc");
        highlightBuilder.postTags("</span>");
        searchSourceBuilder.highlighter(highlightBuilder);

        List<RequestParamDoc> list = new ArrayList<>();

        long total = 0L;

        try {

            //在索引库中进行查询
            SearchResponse response = client.search(searchRequest, RequestOptions.DEFAULT);
            SearchHits hits = response.getHits();

            //获取总条数
            total = response.getHits().getTotalHits().value;

            for (SearchHit hit : hits) {

                String jsonStr = hit.getSourceAsString();

                //json转化为对象
                RequestParamDoc requestParamDoc = JSON.parseObject(jsonStr, RequestParamDoc.class);

                list.add(requestParamDoc);

            }

        } catch (IOException e) {
            log.error("Es搜索异常！");
            e.printStackTrace();

        }

        return new PageResult(total, list);

    }
}

Springboot启动类

@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
public class WayApplication {

    public static void main(String[] args) {
        SpringApplication.run(WayApplication.class, args);
    }

    @Bean
    public RestHighLevelClient client(){

        final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();

        //进行es的授权
        credentialsProvider.setCredentials(AuthScope.ANY,new UsernamePasswordCredentials("es111","123344555"));

        //es的链接库
        return new RestHighLevelClient(RestClient.builder(HttpHost.create("http://127.0.0.1:9200")).setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() {
            @Override
            public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpAsyncClientBuilder) {
                httpAsyncClientBuilder.disableAuthCaching();
                return httpAsyncClientBuilder.setDefaultCredentialsProvider(credentialsProvider);
            }
        }));
    }

}