修改前的listener.ora （D:oracleproduct10.2.0db_1NETWORKADMINlistener.ora）

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = D:oracleproduct)
      (PROGRAM = extproc)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = logicgate)(PORT = 1521))
    )
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
    )
  )

修改后的listener.ora

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = D:oracleproduct)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = epcit)
      (ORACLE_HOME = d:oracleproduct)
      (SID_NAME = epcit)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = logicgate)(PORT = 1523))
    )
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
    )
  )

监听端口从1521变为1523。由于oracle实例的动态注册只能在默认端口1521上运行，端口改变后我这里使用了静态注册。重新启动监听器：

D:>lsnrctl stop

D:>lsnrctl start

D:>lsnrctl services

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=logicgate)(PORT=1523)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
  Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:0 refused:0
         LOCAL SERVER
Service "epcit" has 1 instance(s).
  Instance "epcit", status UNKNOWN, has 1 handler(s) for this service...
    Handler(s):
      "DEDICATED" established:0 refused:0
         LOCAL SERVER
The command completed successfully

可以看到数据库实例"epcit"已经成功注册到监听器的端口1523上面。改变监听器端口后运行tnsping会出错，但只要更改tnsnames.ora中对应的端口就可以了。

然后登陆database control, 出现如下错误：Enterprise Manager is not able to connect to the database instance. The state of the components are listed below。修改方法如下：

1、%oracle_home\%hostname%_epcitsysmanconfigemoms.properties 在这个文件里我们可以找到两个和端口有关的设置

oracle.sysman.eml.mntr.emdRepPort=1521

oracle.sysman.eml.mntr.emdRepConnectDescriptor=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=LOGICGATE)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=epcit)))

把旧的端口改为新的端口就ok。

2、%oracle_home\%hostname%_epcitsysmanemd argets.xml  把所有旧的端口换成新的。

3、重启database control，登陆oem，成功！