Including code examples for each point will make the guide practical. Each example should be a small, self-contained snippet that demonstrates the usage.
Need to mention that in the guide. Also, if there's a new way to handle system properties or environment variables, that could be part of the new features.
import cn.hutool.core.io.FileUtil;
Let me structure the guide accordingly, making sure each new feature is explained with context and examples. Also, highlight the benefits these features bring to developers.