其他：关于配置文件tnsnames.ora

SID的方式：

DB_82_204 = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = ip)(PORT = 1521)) ) (CONNECT_DATA = (SID = ora11g) ) )

service_name：

DB_82_233 = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = ip )(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = orcl.oracle11g.com ) ) )

这就要注意登录的时候数据库如何填写，是哪种方式：

ip:orcl sid ip/orcl servicec_name

也就是这边，由于我配置的是SERVICE_NAME = ORCL，所以IP/service_name（也就是ip/ORCL）