黑马点评 用redis存经纬度信息

    @Test
    public void 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里面
        Map<Long, List<Shop>> map = list.stream().collect(Collectors.groupingBy(Shop::getTypeId));

        for (Map.Entry<Long, List<Shop>> entry : map.entrySet()) {
            //左边是id，右边是 商铺
            Long typeId = entry.getKey();
            String key ="shop:geo:"+typeId.toString();
            List<Shop> shops = entry.getValue();
           List<RedisGeoCommands.GeoLocation<String>> locations=new ArrayList<>(shops.size());
            for (Shop shop : shops) {
                locations.add(new RedisGeoCommands.GeoLocation<>(shop.getId().toString(),new Point(shop.getX(),shop.getY())));
            }
            stringRedisTemplate.opsForGeo().add(key,locations);
        }
    }

根据typeid进行分类。

知识点：

Map<Long, List<Shop>> map = list.stream().collect(Collectors.groupingBy(Shop::getTypeId));

可以将List类型转为map类型

GeoLocation类型的创建和使用

List<RedisGeoCommands.GeoLocation<String>> locations=new ArrayList<>(shops.size());
 for (Shop shop : shops) {
     locations.add(new RedisGeoCommands.GeoLocation<>(shop.getId().toString(),new Point(shop.getX(),shop.getY())));
 }