ORA-12505:TNS 侦听器当前不知道连接描述符中给出的 SID

Question

我正在使用 Oracle 数据库。我用 Java 编写了一个小型 JDBC 连接程序，但我遇到了侦听器的问题。

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class JdbcConnection {
    public static void main(String[] args) throws SQLException,ClassNotFoundException {
        String url = "jdbc:oracle:thin:@localhost:1521:orcl";
        String user = "system";
        String password = "password";
        Connection connection = null;

        Class.forName("oracle.jdbc.driver.OracleDriver");
        connection = DriverManager.getConnection(url, user, password);
        if(connection!=null){
            System.out.println("Success in connnection");
        } else {
            System.out.println("failure in connection ");
        }
    }
}

我收到以下异常：

C:\Users\Administrator\Desktop>java JdbcConnection
Exception in thread "main" java.sql.SQLException: Listener refused the connectio
n 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:
441)
        at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
        at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtensio
n.java:35)
        at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
        at java.sql.DriverManager.getConnection(Unknown Source)
        at java.sql.DriverManager.getConnection(Unknown Source)
        at JdbcConnection.main(JdbcConnection.java:18)

这是lsnrctl status的输出

LSNRCTL for 64-bit Windows: Version 12.1.0.1.0 - Production on 16-JUN-2015 13:43
:41

Copyright (c) 1991, 2013, Oracle.  All rights reserved.

Welcome to LSNRCTL, type "help" for information.

LSNRCTL> status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for 64-bit Windows: Version 12.1.0.1.0 - Produ
ction
Start Date                16-JUN-2015 12:02:52
Uptime                    0 days 1 hr. 40 min. 52 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   C:\app\orauser\product\12.1.0\dbhome_1\network\admin\l
istener.ora
Listener Log File         C:\app\orauser\diag\tnslsnr\hydwemvm\listener\alert\lo
g.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=hydwemvm)(PORT=1521)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
  Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully

Answer 1

如果您知道您的 oracle 数据库 SID，请使用

jdbc:oracle:thin:@localhost:1521:orcl

如果您有服务名称，请在下面使用

jdbc:oracle:thin:@localhost:1521/orcl

此外，请确保名称为 ORCL 的服务名称应该已启动并正在运行。如果仍然不起作用，那么您需要重新启动机器并在上面重试。

还是不行？然后，尝试以下操作：

使用SYSTEM 用户登录并通过运行以下SQL 注册LOCAL_LISTENER。

alter system set local_listener = '(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521))' scope = both;
alter system register;

---

如何查看 oracle SID 和服务名称：

SELECT sys_context('USERENV', 'SID') FROM DUAL; -- It will return your oracle database SID

SELECT sys_context('USERENV', 'SERVICE_NAME') FROM DUAL; -- It will return your oracle database service name

Answer 2

如果您想知道数据库的默认 SID，请在 sqlplus 中使用此查询：

SELECT sys_context('USERENV', 'SID') FROM DUAL;

在 JDBC URL 中使用此值而不是“orcl”。

Answer 3

您可以使用以下网址吗？
注意区别，这是使用 SERVICENAME 而不是 SID。

jdbc:oracle:thin:@localhost:1521/orclservice

Answer 4

我也面临同样的问题。

尝试拔下 LAN 电缆或断开网络连接，然后 重启Listener的服务并运行代码。

它对我有用。