连接数据库时的异常：TNS:listener does not currently know of SID given in connect descriptor The Connection descriptor used by the client was: localhost:1521:orc

eclipse连接数据库时出现了这样的异常：

java.sql.SQLException: Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
The Connection descriptor used by the client was:
localhost:1521:orcl

并且对于Oracle sql developer 不能正常连接数据库如图：



解决办法：

查找数据库中listener.ora配置文件：

# listener.ora Network Configuration File: E:\app\hp\product\11.2.0\dbhome_1\NETWORK\ADMIN\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = E:\app\hp\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
(ENVS = "EXTPROC_DLLS=ONLY:E:\app\hp\product\11.2.0\dbhome_1\bin\oraclr11.dll")（如果有这句，需要把此句删除）
)
)

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
)
)

ADR_BASE_LISTENER = E:\app\hp
修改后为：（红色字体为增加的代码）

# listener.ora Network Configuration File: E:\app\hp\product\11.2.0\dbhome_1\NETWORK\ADMIN\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = E:\app\hp\product\11.2.0\dbhome_1)
(PROGRAM = extproc)
)
(SID_DESC =
(GLOBAL_DBNAME = ORCL)
(ORACLE_HOME = E:\app\hp\product\11.2.0\dbhome_1)
(SID_NAME = ORCL)
)
)

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
)
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
)
)

修改后重新启动服务，这样就ok了！

ADR_BASE_LISTENER = E:\app\hp