6，再去检查两个实例的编码
[oracle@pttest4 expdpimpdp]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.1.0 Production on Fri May 29 21:32:12 2015
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select name from v$database;
NAME
---------
pt2
SQL>
SQL> SELECT * FROM V$NLS_PARAMETERS WHERE PARAMETER IN ('NLS_CHARACTERSET', 'NLS_NCHAR_CHARACTERSET');
Warning: connection was lost and re-established
PARAMETER VALUE
---------------------------------------------------------------- ----------------------------------------------------------------
NLS_CHARACTERSET ZHS16GBK
NLS_NCHAR_CHARACTERSET AL16UTF16
SQL>
导出实例上：
[oracle@pttest4 expdpimpdp]$ export ORACLE_SID=pt1;
[oracle@pttest4 expdpimpdp]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.1.0 Production on Fri May 29 21:32:50 2015
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select name from v$database;
NAME
---------
pt1
SQL> SELECT * FROM V$NLS_PARAMETERS WHERE PARAMETER IN ('NLS_CHARACTERSET', 'NLS_NCHAR_CHARACTERSET');
PARAMETER VALUE
---------------------------------------------------------------- ----------------------------------------------------------------
NLS_CHARACTERSET ZHS16GBK
NLS_NCHAR_CHARACTERSET AL16UTF16
SQL>
此时，两个实例上字符集一模一样了，保持一致。
7，重新导入impdp
[oracle@pttest4 admin]$ export ORACLE_SID=pt2;
[oracle@pttest4 admin]$ impdp \'sys/sysdevpd@pt2 as sysdba\' directory=dir_dump_t3 dumpfile=expdpfull_pd_20150529_02.dmp nologfile=y TABLE_EXISTS_ACTION=REPLACE
OK，一切正常，可以导入到实例2上面了。