Oracle 10g的DBA无法登录解决方案

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 "iSQL*Plus DBA/admin" -password welcome -adduser "iSQL*Plus 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 "iSQL*Plus DBA/admin" -password welcome -listusers "iSQL*Plus 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 "iSQL*Plus DBA/admin" -password welcome -grantrole webDba "iSQL*Plus 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。