EXP-00056: ORACLE error 12514 encountered解决方法

[oracle@cj emp_imp]$ exp scott/tiger@cj01 tables=scott.dept, file='/db/ora11g/test/emp_imp/dept.dmp', log='/db/ora11g/test/emp_imp/dept.log';

Export: Release 11.2.0.1.0 - Production on Wed Feb 26 21:41:22 2014

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.


EXP-00056: ORACLE error 12514 encountered
ORA-12514: TNS:listener does not currently know of service requested in connect descriptor
EXP-00000: Export terminated unsuccessfully

使用转义字符进行转换
[oracle@cj emp_imp]$ exp scott/\"tiger@cj01\" tables=scott.dept, file='/db/ora11g/test/emp_imp/dept.dmp', log='/db/ora11g/test/emp_imp/dept.log';

Export: Release 11.2.0.1.0 - Production on Wed Feb 26 21:44:18 2014

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.


EXP-00056: ORACLE error 1017 encountered
ORA-01017: invalid username/password; logon denied
Username: scott
Password: 

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
Export done in ZHS16GBK character set and AL16UTF16 NCHAR character set
server uses WE8MSWIN1252 character set (possible charset conversion)

About to export specified tables via Conventional Path ...
. . exporting table                           DEPT          4 rows exported
EXP-00091: Exporting questionable statistics.
EXP-00091: Exporting questionable statistics.
Export terminated successfully with warnings.