I'm trying to call a servlet plugin(hosted in SSO) using a java client , htt

If you're using Apache HttpClient or similar Java client, you can first retrieve that login page (which you already done), and then do a POST with your login credentials, as if you're submitting the login form using browser. After that, your Java HTTP client should receive cookies representing authenticated session with the SSO system. Then reuse that HTTP client to invoke the target Servlet.

If you're using Apache HttpClient or similar Java client, you can first retrieve that login page (which you already done), and then do a POST with your login credentials, as if you're submitting the login form using browser. After that, your Java HTTP client should receive cookies representing authenticated session with the SSO system. Then reuse that HTTP client to invoke the target Servlet.