方法如下：
在D:\oracle\product\10.2.0\db_1\sqlplus\admin路径下面的glogin.sql文件末尾添加如下代码：
set termout off
define loginname = idle
column global_name new_value loginname
SELECT user
||'@'
||substr(global_name, 1, decode(dot, 0,length(global_name), dot-1)) global_name
FROM
(SELECT global_name,
instr(global_name, '.') dot
FROM global_name);
set sqlprompt '&loginname>'
set termout on
解决啦！！
另：
仔细看里面的代码，发现set termout off和set termout on，这两个参数是用来设置信息显示的，如：
GLOBAL_NAME
------------------------------------------------------------------------------
XIYUAN@OCP10G
会话已更改。
会话已更改。
之类的信息，如果将其后面的set termout 设置为off，则这些信息都不显示。
还有一个参数：set feedback on/off，它指定的是遍历表之后返回的行数提示信息，如：
已选择 1 行。
所以可以在set termout on的前面设置各种参数，例如：
ALTER SESSION SET NLS_DATE_FORMAT = ‘YYYY-MM-DD’
ALTER SESSION SET NLS_DATE_LANGUAGE = ‘AMERICAN’
SET FEEDBACK ON/OFF
例如修改过后的glogin.sql的内容是：
--
-- Copyright (c) 1988, 2004, Oracle Corporation. All Rights Reserved.
--
-- NAME
-- glogin.sql
--
-- DESCRIPTION
-- SQL*Plus global login "site profile" file
--
-- Add any SQL*Plus commands here that are to be executed when a
-- user starts SQL*Plus, or uses the SQL*Plus CONNECT command
--
-- USAGE
-- This script is automatically run
--
-- Used by Trusted Oracle
COLUMN ROWLABEL FORMAT A15
-- Used for the SHOW ERRORS command
COLUMN LINE/COL FORMAT A8
COLUMN ERROR FORMAT A65 WORD_WRAPPED
-- Used for the SHOW SGA command
COLUMN name_col_plus_show_sga FORMAT a24
COLUMN units_col_plus_show_sga FORMAT a15
-- Defaults for SHOW PARAMETERS
COLUMN name_col_plus_show_param FORMAT a36 HEADING NAME
COLUMN value_col_plus_show_param FORMAT a30 HEADING VALUE
-- Defaults for SHOW RECYCLEBIN
COLUMN origname_plus_show_recyc FORMAT a16 HEADING 'ORIGINAL NAME'
COLUMN objectname_plus_show_recyc FORMAT a30 HEADING 'RECYCLEBIN NAME'
COLUMN objtype_plus_show_recyc FORMAT a12 HEADING 'OBJECT TYPE'
COLUMN droptime_plus_show_recyc FORMAT a19 HEADING 'DROP TIME'
-- Defaults for SET AUTOTRACE EXPLAIN report
-- These column definitions are only used when SQL*Plus
-- is connected to Oracle 9.2 or earlier.
COLUMN id_plus_exp FORMAT 990 HEADING i
COLUMN parent_id_plus_exp FORMAT 990 HEADING p
COLUMN plan_plus_exp FORMAT a60
COLUMN object_node_plus_exp FORMAT a8
COLUMN other_tag_plus_exp FORMAT a29
COLUMN other_plus_exp FORMAT a44
-- Default for XQUERY
COLUMN result_plus_xquery HEADING 'Result Sequence'
set termout off
define loginname = idle
column global_name new_value loginname
SELECT user
||'@'
||substr(global_name, 1, decode(dot, 0,length(global_name), dot-1)) global_name
FROM
(SELECT global_name,
instr(global_name, '.') dot
FROM global_name);
set sqlprompt '&loginname>'
ALTER SESSION SET nls_date_format = 'YYYY-MM-DD';
ALTER SESSION SET nls_date_language = 'AMERICAN';
set feedback on
set termout on