Oracle 12505错误：listener does not currently know...

解决办法：首先查看一下listener是否启动，开启cmd，输入命令 app

Lsnrctl，以下字体

输入status，查看状态
spa

咱们看到没有orcl实例，须要到listener.org中配置信息图片

D:\app\Administrator\product\11.2.0\dbhome_1\NETWORK\ADMIN ci

找到listenr.org，用记事本打开 cmd

#listener.oraNetworkConfiguration io

File: D:\app\Administrator\product\11.2.0\dbhome_1\network\admin\listener.ora table

# Generated by Oracle configuration tools. class

SID_LIST_LISTENER = 配置

(SID_LIST =

(SID_DESC =

(SID_NAME = CLRExtProc)

(ORACLE_HOME = D:\app\Administrator\product\11.2.0\dbhome_1)

(PROGRAM = extproc)

(ENVS = "EXTPROC_DLLS=ONLY:D:\app\Administrator\product\11.2.0\dbhome_1\bin\oraclr11.dll")

)

(SID_DESC =

(GLOBAL_DBNAME = orcl)

(ORACLE_HOME = D:\app\Administrator\product\11.2.0\dbhome_1)

(SID_NAME = orcl)

)

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))

)

ADR_BASE_LISTENER = D:\app\Administrator

红色字体为增长的实例内容。

这时再重启一下监听器，在cmd中输入reload便可。

这时看到orcl实例，这时再在Oracle SQL Developer中链接就能够了。