問(wèn)題描述
在 Java 中獲取地理位置的最佳方式是什么(如果可能,免費(fèi))?
What is the best way to get geo-location in Java (freely if possible)?
更新:不是來(lái)自 GPS 設(shè)備.基本上 Firefox 3.5/HTML 5 是如何做到的
Update: Not from a GPS device. Basically how Firefox 3.5 / HTML 5 does it
推薦答案
一個(gè)簡(jiǎn)單的方法是使用 GeoLite (http://dev.maxmind.com/geoip/legacy/geolite/).因?yàn)樗褂帽镜財(cái)?shù)據(jù)庫(kù),所以不需要網(wǎng)絡(luò)服務(wù)調(diào)用,而且對(duì)大量 IP 進(jìn)行地理編碼要快得多.
An easy way is with GeoLite (http://dev.maxmind.com/geoip/legacy/geolite/). Because it uses a local database no web service calls are needed and it's much faster for geocoding large numbers of IPs.
方法如下:
添加這個(gè) Maven 工件:
Add this Maven artifact:
<dependency>
<groupId>com.maxmind.geoip</groupId>
<artifactId>geoip-api</artifactId>
<version>1.2.11</version>
</dependency>
從 http://geolite.maxmind 下載地理位置數(shù)據(jù)文件.com/download/geoip/database/GeoLiteCity.dat.gz
解壓文件到任意文件夾.然后做:
Unpack the file into any folder. Then do:
LookupService cl = new LookupService("/var/geolite/GeoLiteCity.dat",
LookupService.GEOIP_MEMORY_CACHE | LookupService.GEOIP_CHECK_CACHE);
Location location = cl.getLocation("some ip address");
結(jié)果將在 Location 對(duì)象中的 latitude、longitude、city、region 和 countryCode 屬性中.
The result will be in the Location object in the latitude, longitude, city, region and countryCode properties.
請(qǐng)查看他們的準(zhǔn)確度估算,以確保它滿足您項(xiàng)目的需求:http://www.maxmind.com/en/geolite_city_accuracy.
Please take a look at their accuracy estimates to ensure it meets the needs of your project: http://www.maxmind.com/en/geolite_city_accuracy .
這篇關(guān)于在 Java 中獲取地理位置的最佳方法的文章就介紹到這了,希望我們推薦的答案對(duì)大家有所幫助,也希望大家多多支持html5模板網(wǎng)!