For website testing, how do I proceed past a security alert?

I’m trying to prepare test data for an extensive load test of a website. Since the test needs to be able to simulate many different users with different logon ID’s, I need to provide the user ID and password for each simulated session. I can get the userids from a database, and, because this is a test site, the passwords are all supposed to have been set to the same dummy value. However, only about 50% of the userids work with the dummy password.

So how can I test a userid/password combination before generating test data for it? I’m trying to do this with a Java application that uses the URL class, but I’m running into difficulty with the security alert. When I surf to the website “live”, a warning box appears and says that I have not chosen to trust the company that issued the certificate, and/or that the name on the security certificate is not valid. When I run my application, I get the following error message:

ERROR: javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateException: Could not find trusted certificate

What can I do to get around this? Any help would be appreciated.
–Spectre, whose former handle javaman had more to do with coffee than with any great ability with the java language.

If you are using Internet Explorer, going to Tools -> Internet Options -> Security, and fiddling with the security level may help.

A quick and dirty solution is to wipe the password column (set all the records to “” or NULL, depending on the database and the application).