net.ipip.ipdb.InvalidDatabaseException: database file size error异常解决记录

fastjson版本，原为<version>1.1.41</version> ，修改为
 <version>1.2.70</version> 即可
`<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
            <version>1.2.70</version> 
		</dependency>`
