Linux环境报java.net.UnknownHostException: oracledb.sys.iflashbuy.com，原因为Linux下无法解析oracledb.sys.iflashbuy.com，解决方法为：修改 /etc/hosts
vi /etc/hosts进行编辑，添加红色部分
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.5.110 oracledb.sys.iflashbuy.com