一直都不明确sqlnet.ora中的NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)是什么意思。今天看到一篇文档，就是登陆选用的方式。做一个測试：

tnsnames.ora 

10.10.32.119 =

  (DESCRIPTION =

    (ADDRESS_LIST =

      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.32.119)(PORT = 1521))

    )

    (CONNECT_DATA =

      (SERVICE_NAME = orcl11g)

    )

  )

  

sqlnet.ora  

NAMES.DIRECTORY_PATH= (TNSNAMES)

C:\Users\Administrator>sqlplus test/test@10.10.32.119

SQL*Plus: Release 11.2.0.1.0 Production on 星期二 6月 2 18:50:57 2015

Copyright (c) 1982, 2010, Oracle.  All rights reserved.

连接到:

Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> 从 Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options 断开

C:\Users\Administrator>sqlplus test/test@10.10.32.119/orcl11g

SQL*Plus: Release 11.2.0.1.0 Production on 星期二 6月 2 18:55:06 2015

Copyright (c) 1982, 2010, Oracle.  All rights reserved.

ERROR:

ORA-12154: TNS: 无法解析指定的连接标识符

请输入username:

sqlnet.ora  

NAMES.DIRECTORY_PATH= (TNSNAMES)

C:\Users\Administrator>sqlplus test/test@10.10.32.119

SQL*Plus: Release 11.2.0.1.0 Production on 星期二 6月 2 18:56:47 2015

Copyright (c) 1982, 2010, Oracle.  All rights reserved.

ERROR:

ORA-12504: TNS: 监听程序在 CONNECT_DATA 中未获得 SERVICE_NAME

请输入username:

C:\Users\Administrator>sqlplus test/test@10.10.32.119/orcl11g

SQL*Plus: Release 11.2.0.1.0 Production on 星期二 6月 2 18:57:03 2015

Copyright (c) 1982, 2010, Oracle.  All rights reserved.

连接到:

Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production

With the Partitioning, OLAP, Data Mining and Real Application Testing options