linux系统部署Java程序获取ip时报Caused by: java.net.UnknownHostException: XXXXXXXXXX: XXXXXXXXXX: Name or service not known

问题一： 
Caused by: java.net.UnknownHostException: XXXXXXXXXX: XXXXXXXXXX: Name or service not known

vi /etc/hosts
127.0.0.1 iZuf68tztea6l5ccdz7wemZ

XXXXXXXXXX自己的主机名