在 Java 中获取地理位置的最佳方法
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Best way to get geo-location in Java
提问by Athena
What is the best way to get geo-location in Java (freely if possible)?
在 Java 中获取地理位置的最佳方法是什么（如果可能的话，免费）？
Update: Not from a GPS device. Basically how Firefox 3.5 / HTML 5 does it
更新：不是来自 GPS 设备。Firefox 3.5 / HTML 5 基本上是如何做到的
回答by Denilson Sá Maia
If you want to know how Firefox 3.5 (or Google Chrome) gets the geolocation, then please take a look here: How Google/Firefox Geolocation API works
如果您想知道 Firefox 3.5（或 Google Chrome）如何获取地理位置，请查看此处：Google/Firefox Geolocation API 的工作原理
Basically, what Firefox 3.5 (as well as Chrome) does is to get the list of nearby Wi-Fi networks and send that list using JSON to a Google webservice, which will then return the approximate coordinates.
基本上，Firefox 3.5（以及 Chrome）所做的是获取附近 Wi-Fi 网络的列表，并使用 JSON 将该列表发送到 Google 网络服务，然后该服务将返回近似坐标。
By the way, there is no Java involved in this process. To get geolocation from Firefox/Chrome, you just call a few JavaScript methods. (I really hope that you know that Java is different from JavaScript)
顺便说一下，这个过程没有涉及Java。要从 Firefox/Chrome 获取地理位置，您只需调用一些 JavaScript 方法。（我真的希望你知道 Java 与 JavaScript 不同）
回答by Marquez
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.
一个简单的方法是使用 GeoLite ( http://dev.maxmind.com/geoip/legacy/geolite/)。因为它使用本地数据库，所以不需要 Web 服务调用，而且对大量 IP 进行地理编码的速度要快得多。
Here is how:
方法如下：
Add this Maven artifact:
添加此 Maven 工件：
<dependency>
<groupId>com.maxmind.geoip</groupId>
<artifactId>geoip-api</artifactId>
<version>1.2.11</version>
</dependency>
Download the geolocation data file from http://geolite.maxmind.com/download/geoip/database/GeoLiteCity.dat.gz
从http://geolite.maxmind.com/download/geoip/database/GeoLiteCity.dat.gz下载地理定位数据文件
Unpack the file into any folder. Then do:
将文件解压到任意文件夹中。然后做：
LookupService cl = new LookupService("/var/geolite/GeoLiteCity.dat",
LookupService.GEOIP_MEMORY_CACHE | LookupService.GEOIP_CHECK_CACHE);
Location location = cl.getLocation("some ip address");
The result will be in the Location object in the latitude, longitude, city, region and countryCode properties.
结果将在纬度、经度、城市、地区和国家代码属性中的位置对象中。
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.
请查看他们的准确度估计值，以确保它满足您项目的需求：http: //www.maxmind.com/en/geolite_city_accuracy。
