Spring Boot 整合 分布式搜索引擎 Elastic Search 实现 我附近的、酒店竞排

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
import org.springframework.stereotype.Service;
 
@Service
public class MyPlaceService {
 
    @Autowired
    private ElasticsearchTemplate elasticsearchTemplate;
 
    public List<MyPlace> findMyPlaceByLocation(double lat, double lon, int page, int size) {
        PageRequest pageRequest = PageRequest.of(page, size);
        // 构建查询条件
        NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder()
                .withPageable(pageRequest)
                .withQuery(coordinateQuery("location").distance(lon, lat).point(lon, lat).within(50, DistanceUnit.KILOMETERS));
 
        // 执行查询
        Page<MyPlace> pageResult = elasticsearchTemplate.queryForPage(queryBuilder.build(), MyPlace.class);
        return pageResult.getContent();
    }
 
    // 假设MyPlaceRepository是继承自ElasticsearchRepository的Repository
    // public interface MyPlaceRepository extends ElasticsearchRepository<MyPlace, String> {
    // }
}

这个代码示例展示了如何在Spring Boot应用中使用ElasticsearchTemplate来执行基于位置的搜索查询。它使用了NativeSearchQueryBuilder来构建查询，并通过elasticsearchTemplate.queryForPage方法执行查询并获取分页结果。这个示例假设MyPlace实体类已经映射到Elasticsearch中相应的索引，并且MyPlaceRepository接口继承自ElasticsearchRepository。