D:\oracle\ora81\network\ADMIN\tnsnames.ora
在这个文件中可以直接添加你的服务名
# TNSNAMES.ORA Network Configuration File: d:\oracle\ora81\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.
		ORA9I =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = louhr)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = ora9i.domain)
    )
  )
		INST1_HTTP =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = louhr)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVER = SHARED)
      (SERVICE_NAME = ora9i.domain)
      (PRESENTATION = http://admin)
    )
  )
		EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
    )
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
    )
  )
		PMIS =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.147.218.162)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SID = pmis)
    )
  )
		
				
SAPPSD =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST =10.147.218.159)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SID = jxsc)
    )
  )