问题描述
我已下载 ip-to-country.csv，其中包含映射到国家/地区的 IP 范围.我应该如何将这些数据存储到数据库中，如何查询 IP 地址在什么范围内才能知道 IP 地址来自哪里?
I have downloaded ip-to-country.csv that has ip ranges that are mapped to countries. How should I store this data to database and how can I query in what range Ip address is to know where Ip address is coming from?
推荐答案
我写了一个小库，叫做 ip2c 做到这一点.它使用来自 webhosting.info 的数据库，但也支持来自 Software77.
I wrote a small lib called ip2c to do just that. it uses the database from webhosting.info but also supports that from Software77.
它将 CSV 信息转换为紧凑的二进制格式，并且可以直接在文件、内存或内存映射文件中进行搜索.
It converts the CSV info a compact binary format and can do the search straight on the file, in memory or in a memory mapped file.
Java API 用法类似:
The Java API usage is similar to this:
String ip = 85.64.225.159;
int caching1 = IP2Country.NO_CACHE; // Straight on file, Fastest startup, slowest queries
int caching2 = IP2Country.MEMORY_MAPPED; // Memory mapped file, fast startup, fast queries.
int caching3 = IP2Country.MEMORY_CACHE; // load file into memory, slowerst startup, fastest queries
IP2Country ip2c = new IP2Country(caching1);
Country c = ip2c.getCountry(ip);
if (c == null)
{
System.out.println("UNKNOWN");
}
else
{
// will output IL ISR ISRAEL
System.out.println(c.get2cStr() + " " + c.get3cStr() + " " + c.getName());
}
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