求教！数据库连接问题！急！急！
数据库为：oracle 安装在自己笔记本上，笔记本ip：192.168.1.101

Java code

 异常如下： java.sql.SQLException: Listener refused the connection with the following error:ORA-12505, TNS:listener does not currently know of SID given in connect descriptorThe Connection descriptor used by the client was:192.168.1.101:1521:devorcljdbc文件如下：jdbc.driverClassName=oracle.jdbc.driver.OracleDriverjdbc.url=jdbc:oracle:thin:@192.168.1.101:1521:devorcljdbc.username=sjhosjdbc.password=sjhoslistener.ora 如下：SID_LIST_LISTENER =  (SID_LIST =    (SID_DESC =      (SID_NAME = PLSExtProc)      (ORACLE_HOME = g:\oracle\product\10.2.0\db_2)      (PROGRAM = extproc)    )  )LISTENER =  (DESCRIPTION_LIST =    (DESCRIPTION =      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))      (ADDRESS = (PROTOCOL = TCP)(HOST = hp-PC)(PORT = 1521))    )  )tnsnames.ora文件内容如下：ORCL =  (DESCRIPTION =    (ADDRESS = (PROTOCOL = TCP)(HOST = hp-PC)(PORT = 1521))    (CONNECT_DATA =      (SERVER = DEDICATED)      (SERVICE_NAME = orcl)    )  )external_project =  (DESCRIPTION =    (ADDRESS = (PROTOCOL = TCP)(HOST = hp-PC)(PORT = 1521))    (CONNECT_DATA =      (SERVER = DEDICATED)      (SERVICE_NAME = devorcl)    )  )DEVORCL =  (DESCRIPTION =    (ADDRESS = (PROTOCOL = TCP)(HOST = hp-PC)(PORT = 1521))    (CONNECT_DATA =      (SERVER = DEDICATED)      (SERVICE_NAME = devorcl)    )  )

[解决办法]
用sqlplus登录下看
[解决办法]
服务启动了吗？
[解决办法]
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = hp-PC)(PORT = 1521))
)
)

hp-PC改为你的iP地址
还有看看是不是防火墙把1521这个端口给封了