ORA-12514: TNS: 监听程序当前无法识别连接描述符中请求的服务

这种一般是需要配置D:\Oracle11g\product\11.2.0\dbhome_1\NETWORK\ADMIN下面的listener.ora文件。比如我的该文件前面的代码修改完成后为：（红色为我手动添加的部分）。当然，你也可以用oracle自带的net manage来配置，左边导航栏依次展开本地-->监听程序-->listener,然后右边上面有个小的下拉列表，选择数据库服务，点击下面的”添加数据库“，要点就是全局数据库名和sid要一致（最好都是orcl)，home可以不填。然后注意重新启动listener服务即可。

# listener.ora Network Configuration File: D:\Oracle11g\product\11.2.0\dbhome_1\network\admin\listener.ora
# Generated by Oracle configuration tools.


SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = D:\Oracle11g\product\11.2.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:D:\Oracle11g\product\11.2.0\dbhome_1\bin\oraclr11.dll")
    )
    (SID_DESC =
      (GLOBAL_DBNAME = orcl)
      (ORACLE_HOME = D:\Oracle11g\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:\Oracle11g