Java: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

Question

I have a class that will download a file from a https server. When I run it, it returns a lot of errors. It seems that I have a problem with my certificate

Answer 1

1. Export the SSL certificate using Firefox. You can export it by hitting the URL in the browser and then select the option to export the certificate. Let's assume the cert file name is your.ssl.server.name.crt
2. Go to your JRE_HOME/bin or JDK/JRE/bin
3. Type the command
4. keytool -keystore ..\lib\security\cacerts -import -alias your.ssl.server.name -file .\relative-path-to-cert-file\your.ssl.server.name.crt
5. Restart your Java process