xiaoshi-weixinback/src/main/java/com/example/xiaoshiweixinback/service/common/EsService.java

package com.example.xiaoshiweixinback.service.common;

import co.elastic.clients.elasticsearch.ElasticsearchClient;
import co.elastic.clients.elasticsearch._types.InlineScript;
import co.elastic.clients.elasticsearch._types.Script;
import co.elastic.clients.elasticsearch._types.query_dsl.Query;
import co.elastic.clients.elasticsearch._types.query_dsl.QueryBuilders;
import co.elastic.clients.elasticsearch.core.SearchRequest;
import co.elastic.clients.elasticsearch.core.SearchResponse;
import co.elastic.clients.elasticsearch.core.search.Hit;
import co.elastic.clients.json.JsonData;
import lombok.RequiredArgsConstructor;
import org.springframework.context.annotation.Lazy;
import org.springframework.stereotype.Service;

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

@Service
@RequiredArgsConstructor(onConstructor_ = {@Lazy})
public class EsService {

    private final ElasticsearchClient client;

    public List<Integer> getTenderList(List<Float> imageList) throws IOException {
        List<Integer> list = new ArrayList<>();
        SearchRequest.Builder builder = new SearchRequest.Builder();
        //设置查询索引
        builder.index("tender");

        String source = "cosineSimilarity(params.queryVector, 'my_vector') + 1.0";
        InlineScript inlineScript = InlineScript.of(i -> i.lang("painless").params("queryVector", JsonData.of(imageList)).source(source));
        Script script = Script.of(i -> i.inline(inlineScript));
        Query query = QueryBuilders.scriptScore(i -> i.script(script).query(org.springframework.data.elasticsearch.client.elc.QueryBuilders.matchAllQueryAsQuery()));
        builder.query(query);
        builder.size(10);
        SearchResponse<Integer> response = client.search(builder.build(), Integer.class);
        List<Hit<Integer>> hits = response.hits().hits();
        double scoreThreshold = 1.95;
        for (Hit<Integer> hit : hits) {
            Double score = hit.score();
            Integer tender = hit.source();
            if (score > scoreThreshold) {
                list.add(tender);
            }
        }
        return list;
    }

}