修改目录：C:\oracle\product\10.2.0\db_1\NETWORK\ADMIN里面的listener.ora文件；请注意红色背景的地方，因为配置客户端配置的方法不对，都配置到SID_LIST_LISTENER外面了，所有Oracle是无法识别的；

配置完成后需要执行ORACLE的命令行，重启监听才可以；

lsnrctl stop   //停止监听
lsnrctl start  //启动监听

lsnrctl status //查看状态

如果您通过命令行查看到了监听里面有orcl那就可以连接了，祝好运。

# listener.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\NETWORK\ADMIN\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
   (SID_DESC =
      (GLOBAL_DBNAME = ORCL)
      (ORACLE_HOME =C:\oracle\product\10.2.0\db_1)
      (SID_NAME = ORCL)
    )
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = C:\oracle\product\10.2.0\db_1)
      (PROGRAM = extproc)
    )
  )

LISTENER =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
  )

ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
  )

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