Oracle ORA-12514: TNS:listener does not currently know of service requested in conn解决方案

# listener.ora Network Configuration File: D:oracleproduct10.1.0Db_1
etworkadminlistener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = D:oracleproduct10.1.0Db_1)
      (PROGRAM = extproc)
    )
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = cust-e44050fe71)(PORT = 1521))
      )
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
      )
    )
  )

(SID_DESC =
      (GLOBAL_DBNAME = GKBM2015) //为数据库服务名
      (ORACLE_HOME = D:oracleproduct10.1.0Db_1)
      (SID_NAME = GKBM2015) //为数据库服务名
     )
    (SID_DESC =
      (GLOBAL_DBNAME = ZYXX2015) //为数据库服务名
      (ORACLE_HOME = D:oracleproduct10.1.0Db_1)
      (SID_NAME = ZYXX2015) //为数据库服务名
    )

# listener.ora Network Configuration File: D:oracleproduct10.1.0Db_1
etworkadminlistener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = D:oracleproduct10.1.0Db_1)
      (PROGRAM = extproc)
    )
    (SID_DESC =
      (GLOBAL_DBNAME = GKBM2015)
      (ORACLE_HOME = D:oracleproduct10.1.0Db_1)
      (SID_NAME = GKBM2015)
     )
    (SID_DESC =
      (GLOBAL_DBNAME = ZYXX2015)
      (ORACLE_HOME = D:oracleproduct10.1.0Db_1)
      (SID_NAME = ZYXX2015)
    )
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = TCP)(HOST = cust-e44050fe71)(PORT = 1521))
      )
      (ADDRESS_LIST =
        (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
      )
    )
  )