Redis geojson实现地图聚合效果

淩亂°似流年 2023-06-25 01:59 12阅读 0赞

**目录**

地图聚合API

Java  Redis示例

--------------------

##  地图聚合API ##

[https://openlayers.org/en/latest/examples/cluster.html][https_openlayers.org_en_latest_examples_cluster.html]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jvb255YQ_size_16_color_FFFFFF_t_70][]

通过地图平移缩放事件控制地图四至范围内地图刷新和加载详细点控制。最终实现效果如下：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jvb255YQ_size_16_color_FFFFFF_t_70 1][]

## Java  Redis示例 ##

添加geojson数据：

/**
    	 * 更新GEOHASH值
    	 * @param dwCode
    	 * @param coordinate
    	 * @param memberName "HLYID-score"
    	 */
    	public static void positonToGeohash(String dwCode,String hlyId,GeoCoordinate coordinate,String memberName){
    		String storeKey=XHT_ZZJG_GEOPOSITION+dwCode;
    		String expireKey=XHT_ZZJG_GEOEXPIRE+dwCode;
    		RedisUtil.geoadd(storeKey, coordinate, memberName);
    		// 设置超时过期
    		RedisUtil.zadd(expireKey,System.currentTimeMillis(),memberName);
    		Set<String> expiredKeys = RedisUtil.zrangeByScore(expireKey, 0, System.currentTimeMillis()-30*60*1000);
    		
    		if(expiredKeys!=null && expiredKeys.size()>0) {
    			//删除超时的数据
    			RedisUtil.zrem(storeKey,expiredKeys.toArray(new String[expiredKeys.size()]));
    			RedisUtil.zrem(expireKey,expiredKeys.toArray(new String[expiredKeys.size()]));
    			//zzjgList.toArray(new String[zzjgList.size()])
    			//TODO : 两个集合中的size不一致时，需要按照expiredKeys中为标准删除storeKey中多余的数据
    			
    		}
    		
    		RedisUtil.expire(expireKey, Constants.MOBILE_TOKEN_KEY_HALF_HOUR);//Constants.MOBILE_TOKEN_KEY_HALF_HOUR
    		RedisUtil.expire(storeKey, Constants.MOBILE_TOKEN_KEY_HALF_HOUR);
    	}

完整代码请下载连接（没有的自行补全）：[https://download.csdn.net/download/boonya/12048388][https_download.csdn.net_download_boonya_12048388]

缺少的工具类请参考：[Redis连接池及单节点工具与多Redis节点管理工具][Redis_Redis]

[https_openlayers.org_en_latest_examples_cluster.html]: https://openlayers.org/en/latest/examples/cluster.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jvb255YQ_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191224105833465.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jvb255YQ==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jvb255YQ_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20191224110024519.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jvb255YQ==,size_16,color_FFFFFF,t_70
[https_download.csdn.net_download_boonya_12048388]: https://download.csdn.net/download/boonya/12048388
[Redis_Redis]: https://blog.csdn.net/boonya/article/details/90051969