IPIP.net officially supported IP database ipdb format parsing library
Added to pom.xml
<dependencies>
<dependency>
<groupId>net.ipip</groupId>
<artifactId>ipdb</artifactId>
<version>1.1.3</version>
</dependency>
</dependencies>
报错请检查 fastjson 版本是否太低，请使用最新版本