Question

Exception in thread "main" 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

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:261)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)  
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:414)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)  
at oraenter code herecle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)  
at java.sql.DriverManager.getConnection(DriverManager.java:582)  
at java.sql.DriverManager.getConnection(DriverManager.java:185)  
at com.test.Date.main(Date.java:13)

这是我的代码

Class.forName("oracle.jdbc.driver.OracleDriver");  
Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","system","tiger");

我还验证了tnsnames.ora文件

ORCL =
(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SID = orcl)
    )
)

我在类路径中添加了ojdbc14.jar，我正在使用oracle10g

请你帮我解决一下。

Answer 1

如上所述，请检查您是否能够执行tnsping tnsping orcl，如果工作正常，请尝试从sqlplus或TOAD或{{1}等任何工具连接到您的数据库}}。如果您收到任何错误，请发布错误，否则请使用以下内容连接到您的数据库并查看其工作原理。

SQLDeveloper

<强> try { Class.forName("oracle.jdbc.OracleDriver"); } catch (ClassNotFoundException e) { e.printStackTrace(); return; } Connection con = null; try { con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","system","tiger"); } catch (SQLException ex) { ex.printStackTrace(); } finally { close(connection); } return

您可以尝试使用以下代码

Update 1

如果不起作用，请尝试以下

jdbc:oracle:thin:@//localhost:1521:orcl","system","tiger

更多信息here

此致

oracle中的数据库连接

1 个答案: