plsql启动时无法解析指定的连接标识符

昨晚上启动plsql时，出现了无法解析指定的连接标识符的问题，然后在d:\app\hp\product\11.2.0\dbhome_1中找到了listener.ora文件，然后对文件进行了修改，内容如下：

# listener.ora Network Configuration File: D:\app\hp\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:\app\hp\product\11.2.0\dbhome_1)

(PROGRAM = extproc)

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

)

(SID_DESC =

(GLOBAL_DBNAME = orcl)

(ORACLE_HOME = D:\app\hp\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\hp

改完之后再启动plsql，就出现了无监听程序，服务也启动了，但我发现在服务中，tns虽然启动了，但是刷新之后仍是停止状态，无法启动。所以重新配置了net configuration assistance，再次重启tns服务，问题就解决了。