Let's Encrypt Certificate not working while using on JAVA API
问题 I am developing a Java application that provides a REST API over HTTP. For security reasons this communication should be switched to HTTPS. I generate a trusted certificate from Let's Encrypt using certbot tool, this certificate seems to be working when I call my API from Chrome browser, but I get this exception when I use a Java 1.8.0_191 client based on Spring RestTemplate: Exception in thread "main" org.springframework.web.client.ResourceAccessException: I/O error on GET request for "https