Network Security Internet Technology Development Database Servers Mobile Phone Android Software Apple Software Computer Software News IT Information

In addition to Weibo, there is also WeChat

Please pay attention

WeChat public account

Shulou

How to realize the function of querying nearby people in Redis

2025-02-24 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Internet Technology >

Share

Shulou(Shulou.com)06/02 Report--

Redis how to achieve query nearby people function, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can gain something.

Import redis.clients.jedis.GeoCoordinate

Import redis.clients.jedis.GeoRadiusResponse

Import redis.clients.jedis.GeoUnit

Import redis.clients.jedis.Jedis

Import java.util.HashMap

Import java.util.List

Import java.util.Map

Public class GeoHashExample {

Public static void main (String [] args) {

Jedis jedis = new Jedis ("127.0.0.1", 6379)

Map map = new HashMap ()

/ / add Xiaoming's position

Map.put ("xiaoming", new GeoCoordinate (116.404269, 39.913164)

/ / add the location of Xiao Hong

Map.put ("xiaohong", new GeoCoordinate (116.36, 39.922461)

/ / add the location of Xiao Mei

Map.put ("xiaomei", new GeoCoordinate (116.499705, 39.874635)

/ / add a waiter

Map.put ("xiaoer", new GeoCoordinate (116.193275, 39.996348)

Jedis.geoadd ("person", map)

/ / query the straight line distance between Xiao Ming and Xiao Hong

System.out.println ("Xiao Ming and Xiao Hong are apart:" + jedis.geodist ("person", "xiaoming")

"xiaohong", GeoUnit.KM) + "KM")

/ / inquire about people who are 5 kilometers near Xiaoming.

List res = jedis.georadiusByMemberReadonly ("person", "xiaoming"

5, GeoUnit.KM)

For (int I = 1; I < res.size (); iTunes +) {

System.out.println ("people near Xiaoming:" + res.get (I) .getMemberByString ())

}

}

}

The results of the above procedures are as follows:

Distance between Xiao Ming and Xiao Hong: 3.9153 KM

People near Xiaoming: xiaohong

Is it helpful for you to read the above content? If you want to know more about the relevant knowledge or read more related articles, please follow the industry information channel, thank you for your support.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.

Views: 0

*The comments in the above article only represent the author's personal views and do not represent the views and positions of this website. If you have more insights, please feel free to contribute and share.

Share To

Internet Technology

Wechat

© 2024 shulou.com SLNews company. All rights reserved.

12
Report