在 Java 中获取地理位置的最佳方法

2022-01-14 00:00:00 geolocation java

在 Java 中获取地理位置的最佳方式是什么(如果可能，免费)?

What is the best way to get geo-location in Java (freely if possible)?

更新:不是来自 GPS 设备.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

推荐答案

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，所以不需要网络服务调用，而且对大量 IP 进行地理编码要快得多.

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:

添加这个 Maven 工件:

Add this Maven artifact:

<dependency>
    <groupId>com.maxmind.geoip</groupId>
    <artifactId>geoip-api</artifactId>
    <version>1.2.11</version>
</dependency>

从 http://geolite.maxmind 下载地理位置数据文件.com/download/geoip/database/GeoLiteCity.dat.gz

解压文件到任意文件夹.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");

结果将在 Location 对象中的 latitude、longitude、city、region 和 countryCode 属性中.

The result will be in the Location object in the latitude, longitude, city, region and countryCode properties.

请查看他们的准确度估算，以确保它满足您项目的需求: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 .

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