Java中如何使用Redis GEO测算经纬度距离

GEOADD cars -115.17087 36.12306 my-car

GEOADD cars -115.171971 36.120609 robins-car

GEODIST cars my-car robins-car

GEODIST cars my-car robins-car km

GEORADIUS cars -115.17258 36.11996 100 m

GEORADIUSBYMEMBER cars robins-car 100 m WITHDIST

ZREM cars my-car

@Component
public class GeoUtil {
    @Autowired
    private RedisTemplate redisTemplate;
    private static final String GEO_KEY = "DISTANCE";
    /**
     * 将经纬度信息添加到redis中
     * @param certId 标识
     * @param longitude 经度
     * @param latitude 纬度
     */
    public void geoAdd(String certId, double longitude, double latitude) {
        GeoOperations geoOperations = redisTemplate.opsForGeo();
        Point point = new Point(longitude, latitude);
        RedisGeoCommands.GeoLocation geoLocation = new RedisGeoCommands.GeoLocation(certId, point);
        geoOperations.add(GEO_KEY, geoLocation);
    }
    /**
     * 两个人之间的距离
     * @param certId1
     * @param certId2
     * @return
     */
    public double distanceBetween(String certId1, String certId2) {
        GeoOperations geoOperations = redisTemplate.opsForGeo();
        Distance distance = geoOperations.distance(GEO_KEY, certId1, certId2);
        return distance.getValue();
    }
    /**
     * 查询距离某个人指定范围内的人，包括距离多少米
     * @param certId
     * @param distance
     * @return
     */
    public Map<String, Double> distanceInclude(String certId, double distance) {
        Map<String, Double> map = new LinkedHashMap<>();
        GeoOperations geoOperations = redisTemplate.opsForGeo();
        RedisGeoCommands.GeoRadiusCommandArgs geoRadiusCommandArgs = RedisGeoCommands.GeoRadiusCommandArgs.newGeoRadiusArgs();
        GeoResults<RedisGeoCommands.GeoLocation<String>> geoResults = geoOperations.radius(GEO_KEY, certId, new Distance(distance), geoRadiusCommandArgs.includeDistance());
        if (geoResults != null) {
            Iterator<GeoResult<RedisGeoCommands.GeoLocation<String>>> iterator = geoResults.iterator();
            while (iterator.hasNext()) {
                GeoResult<RedisGeoCommands.GeoLocation<String>> geoResult = iterator.next();
                // 与目标点相距的距离信息
                Distance geoResultDistance = geoResult.getDistance();
                // 该点的信息
                RedisGeoCommands.GeoLocation<String> geoResultContent = geoResult.getContent();
                map.put(geoResultContent.getName(), geoResultDistance.getValue());
            }
        }
        return map;
    }
}

GeoUtil geoUtil = springApplicationContext.getBean(GeoUtil.class);
geoUtil.geoAdd("北京西站", 116.328103,39.900835);
geoUtil.geoAdd("北京南站", 116.385488,39.87128);
geoUtil.geoAdd("北京西站-南广场", 116.327766,39.898944);
geoUtil.geoAdd("北京西站-南进站口", 116.327765,39.899347);
geoUtil.geoAdd("中铁设计大厦", 116.328628,39.896485);
geoUtil.geoAdd("瑞海大厦", 116.326661,39.903778);
// 计算北京南站与北京西站之间的距离
double distance = geoUtil.distanceBetween("北京西站", "北京南站");
// 5898.4001
System.out.println(distance);
// 查询距离北京西站5000米范围内的地方
Map<String, Double> distanceInclude = geoUtil.distanceInclude("北京西站", 5000);
System.out.println(distanceInclude);