HowToUseSelfSignedCertificates

Since redmine java api there is a support for custom SSL handling. You can provide a HttpClient to the communication layer with:

RedmineManagerFactory.createWithApiKey(String uri, String apiAccessKey, HttpClient httpClient)

or

RedmineManagerFactory.createWithUserAuth(String uri, String login, String password, HttpClient httpClient)

To create a HttpClient you need to do....