Question

我已经安装了Oracle 11g，为了测试目的，我使用编辑器（称为DBeaver）连接到数据库。当主机名提供localhost时，它会连接。但是当主机名作为系统的IP提供时，编辑器无法连接并显示以下消息。

IO Error: The Network Adapter could not establish the connection
  The Network Adapter could not establish the connection
    java.net.ConnectException: Connection refused: connect

我尝试从

更改listener.ora

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

到

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.140.0.3)(PORT = 1521))
    )
  )

这里我用IP替换了localhost，即10.140.0.3。但到目前为止无法连接它。任何人都可以分享一些经验吗？

Answer 1

您的listener.ora条目不正确。它应该如下所示。

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
    )
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.140.0.3)(PORT = 1521))
    )
  )

为避免与手动编辑相关的错误，请使用网络管理器并从那里添加地址。检查以下屏幕截图以使listener.ora文件相关更改。

Open Oracle Net Manager

Add IP address to the Listener

更改完成后，不要忘记将其从Oracle Net Manager保存！