Redis的版本必须是6.2以上

在测试类中将数据导入Redis

@Testvoid loadShopData(){//1.查询店铺信息List<Shop> list = shopService.list();//2.把店铺分组，按照typeId分组，typeId一致的放到一个集合Map<Long, List<Shop>> map = list.stream().collect(Collectors.groupingBy(Shop::getTypeId));//3.分批完成写入Redisfor (Map.Entry<Long, List<Shop>> entry : map.entrySet()) {//3.1获取类型idLong typeId = entry.getKey();String key = "shop:geo:" + typeId;//3.2获取同类型的店铺集合List<Shop> value = entry.getValue();List<RedisGeoCommands.GeoLocation<String>> locations = new ArrayList<>(value.size());//3.3 写入redis GEOADD key 经度 纬度 memberfor (Shop shop : value) {
//                stringRedisTemplate.opsForGeo().add(key, new Point(shop.getX(),shop.getY()), shop.getId().toString());//通过批量来写locations.add(new RedisGeoCommands.GeoLocation<>(shop.getId().toString(),new Point(shop.getX(), shop.getY())));stringRedisTemplate.opsForGeo().add(key, locations);}}}

控制层代码

    public Result queryShopByType(@RequestParam("typeId") Integer typeId,@RequestParam(value = "current", defaultValue = "1") Integer current,@RequestParam(value = "x", required = false) Double x,@RequestParam(value = "y", required = false) Double y) {return shopService.queryShopByType(typeId, current, x, y);}

服务层代码

@Overridepublic Result queryShopByType(Integer typeId, Integer current, Double x, Double y) {//判断是否需要根据坐标进行查询if (x == null || y == null) {//不需要坐标查询，按数据库查询Page<Shop> page = query().eq("type_id", typeId).page(new Page<>(current, SystemConstants.DEFAULT_PAGE_SIZE));// 返回数据return Result.ok(page.getRecords());}//计算分页参数int from = (current - 1) * SystemConstants.DEFAULT_PAGE_SIZE;int end = current * SystemConstants.DEFAULT_PAGE_SIZE;//查询Redis,按照距离排序、分页。结果：shopId、distance  ，通过limit获取的是0-end,之后进行截取String key = SHOP_GEO_KEY + typeId;GeoResults<RedisGeoCommands.GeoLocation<String>> results = stringRedisTemplate.opsForGeo().search(key,GeoReference.fromCoordinate(x, y),new Distance(5000),RedisGeoCommands.GeoSearchCommandArgs.newGeoSearchArgs().includeDistance().limit(end));//4.解析出idif (results == null){return Result.ok(Collections.emptyList());}List<GeoResult<RedisGeoCommands.GeoLocation<String>>> list = results.getContent();if(list.size() <= from){//没有下一页了，结束return Result.ok(Collections.emptyList());}//4.1截取from-end的部分List<Long> ids = new ArrayList<>(list.size());Map<String, Distance> distanceMap = new HashMap<>(list.size());list.stream().skip(from).forEach(result ->{//获取店铺idString shopIdStr = result.getContent().getName();ids.add(Long.parseLong(shopIdStr));//获取距离Distance distance = result.getDistance();distanceMap.put(shopIdStr, distance);});//根据id查询shopString idStr = StrUtil.join(",", ids);List<Shop> shops = query().in("id", ids).last("ORDER BY FIELD(id," + idStr + ")").list();for (Shop shop : shops) {shop.setDistance(distanceMap.get(shop.getImages().toString()).getValue());}return Result.ok(shops);}