1.检测服务端的监听器有没有启动？ lsnrctl status
2.检测E:\oracle\oracle10g\NETWORK\ADMIN是否存在 tnsnames.ora 和sqlnet.ora 两个文件,文件内容分别是
# tnsnames.ora Network Configuration File: E:\oracle\product\10.2.0\client_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
ORCL_10.166.253.19 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.166.253.19)(PORT = 1521))
)
(CONNECT_DATA =
(SID = orcl)
(SERVER = DEDICATED)
)
)
-------------------------------------------------------------------------------------
# listener.ora Network Configuration File: E:\oracle\product\10.2.0\client_1\NETWORK\ADMIN
\listener.ora
# Generated by Oracle configuration tools.
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
)
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = LYR)(PORT = 1521))
)
)
)