在本機安裝了oracle，使用sqlplus和plsqldev連接的時候，tnsname.ora中host寫的是localhost，此時連接oracle都沒有任何問題，但是外機連接本機，和tnsname.ora中host寫成ip地址（192.168.1.110）是，報錯ora-12547，沒有監聽等
解決問題，oracle自帶管理工具，程序-》oracle-oracle...-》配置和移植工具-》Net Manager中找到本地，LISTENER，添加一個監聽服務地址，然後重啓oracle監聽服務，然後就可以使用localhost和ip地址對oracle進行訪問了
LISTENER.ORA文件
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
)
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.110)(PORT = 1521))
)
）
TNSNAME.ORA文件
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)
ORCLIP =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.110)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
)
)