下面就是解决方案：

1- From the command prompt,stop isqlplus:

c:>isqlplusctl stop

2- Assuming that you install oracle under C drive,run the following comands:

c:>set oracle_home=c:\oracle\product\10.2.0\db_1
c:>set java_home=%ORACLE_HOME%\jdk

3- Change directory to:

cd %ORACLE_HOME%\oc4j\j2ee\isqlplus\application-deployments\isqlplus

4- Suppose you need to create a new user with user name ‘yoyo’ and password ‘ch51‘,run the following command:

%JAVA_HOME%\bin\java -Djava.security.properties=%ORACLE_HOME%\oc4j\j2ee\home\config\jazn.security.props -jar %ORACLE_HOME%\oc4j\j2ee\home\jazn.jar -user “iSQLPlus DBA/admin” -password welcome -adduser “iSQLPlus DBA” yoyo ch51

5- To check that adding this new user was successful,run the following command:

%JAVA_HOME%\bin\java -Djava.security.properties=%ORACLE_HOME%\oc4j\j2ee\home\config\jazn.security.props -jar %ORACLE_HOME%\oc4j\j2ee\home\jazn.jar -user “iSQLPlus DBA/admin” -password welcome -listusers “iSQLPlus DBA”
结果：
admin
yoyo

6- To grant a user access to the webDba role from the command line,enter:

%JAVA_HOME%\bin\java -Djava.security.properties=%ORACLE_HOME%\oc4j\j2ee\home\config\jazn.security.props -jar %ORACLE_HOME%\oc4j\j2ee\home\jazn.jar -user “iSQLPlus DBA/admin” -password welcome -grantrole webDba “iSQLPlus DBA” yoyo

7- Now,run start isqlplus again and enjoy it:

isqlplusctl start

8. 再次访问： http://hostname:5560/isqlplus/dba,给出用户名和密码： yoyo 和 ch51 （全小写），就可看到isqlplus的登入界面，

然后再提供用户名：SYSTEM,口令：ch51， 连接标识:(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=KCSQLBI)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=orcl))),权限SYSDBA， 就可以访问了。