import java.util.*;
import javax.management.*;
import weblogic.management.*;
import weblogic.security.providers.authentication.*;
import weblogic.management.security.authentication.AuthenticationProviderMBean;
import weblogic.management.security.authentication.*;

public class test2
{
public static void main(String[] args )
{

MBeanHome adminHome;
String url = "t3://127.0.0.1:7001" ;


adminHome = (MBeanHome)Helper.getAdminMBeanHome("username","password",url);

AuthenticationProviderMBean[] providers = adminHome.getActiveDomain().getSecurityConfiguration().findDefaultRealm().getAuthenticationProviders();

for (int i=0; providers != null && i <providers.length; i++)
{
if (providers instanceof UserEditorMBean)
{
UserEditorMBean editor = (UserEditorMBean)providers;
try
{
editor.createUser("username","password","description";
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
}
}
}

嗯，不错

参考一下！