The fastest ip-region convertor of java version !!!

convert ip address to region info

the data is from https://download.ip2location.com.

...
16781312,JP
16785408,CN
16793600,JP
...

which means the start position of an ip address segment， with where this segment is located.

And the query process is just a simple binary search.

https://ip-country.lichuanyang.top/

具体查看实现方式 https://lichuanyang.top/posts/36780/