spring-data-mongo根据两个经纬度之间距离进行排序

系统管理员 2021-12-09 04:25 284阅读 0赞

将数据（数据中带有经纬度字段）存入mongo中，在根据传入的经纬度与存在mongo中数据的经纬度做距离比较进行排序

1.  实体类

// document注解是指定mongo中那个表
    @Data
    @Document("scenery")
    public class SceneryResult {
    
        private Integer SceneryID;
        private String SceneryName;
        private Integer SceneryGrade;
        private String SceneryAddress;
        private String SceneryProvinceName;
        private String SceneryCityName;
        private String ScenerySummary;
        @GeoSpatialIndexed
        private Double[] Location;//地理位置
        @Transient
        private String SceneryLongitude;//经度（坐标） 高德坐标系
        @Transient
        private String SceneryLatitude;//纬度（坐标）
        private String TicketType;
        private String TicketTypeName;
        private String SceneryAliasName;

1.  将数据存入mongo中

// 获取到的数据
            List result = (List)baseResponse.getResult();
            for (int i = 0; i < result.size(); i++) {
                SceneryResult sceneryResult =  (SceneryResult) result.get(i);
                sceneryResult.setLocation(new Double[]{Double.parseDouble(sceneryResult.getSceneryLongitude()),Double.parseDouble(sceneryResult.getSceneryLatitude())});
                mongoTemplate.save(sceneryResult);
            }

1.  mongo中经纬度的数据  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3cxMzE2MDIyNzM3_size_16_color_FFFFFF_t_70]
2.  根据查询mongo中的数据并根据传入的经纬度与数据中的经纬度计算距离进行排序

public List<SceneryResult> findLists(Integer id, Double SceneryLongitude, Double SceneryLatitude,
                                          Integer page, Integer size){
    		// page一定要减1
            Pageable pageable = PageRequest.of(page-1,size);
            List<SceneryResult> sceneryResultList = new ArrayList<>();
            // mongo的方法，传入经纬度
            Point point = new Point(SceneryLongitude,SceneryLatitude);
            // 按条件查询
            //Criteria criteria = Criteria.where("sceneryID").is(id);
            //Query query1 = new Query(criteria);
            NearQuery nearQuery = NearQuery.near(point,Metrics.KILOMETERS).with(pageable);
            GeoResults<SceneryResult> geoResults = mongoTemplate.geoNear(nearQuery, SceneryResult.class);
            List<GeoResult<SceneryResult>> list = geoResults.getContent();
            for (int i = 0; i < list.size(); i++) {
                GeoResult<SceneryResult> sceneryResultGeoResult =  list.get(i);
                sceneryResultList.add(sceneryResultGeoResult.getContent());
                
                // 打印出距离
                System.out.println(sceneryResultGeoResult.getDistance());
            }
    
            return sceneryResultList;

controller直接调用这个方法即可，最后出来的数据就是从近到远排序的

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3cxMzE2MDIyNzM3_size_16_color_FFFFFF_t_70]: /images/20211209/a70d678329744e6e9b69118c456f0f8b.png