SO Isn't Evil and Java Is Not The Problem
I agree that SO is not documentation, and that you can't rely on anything someone posted there at face value. However, it provides indispensable advice that is the result of crowdsourcing. I rely heavily on SO simply because I typically find good advice there. I also contribute occasionally and, once in a while, say something stupid. Generally, that gets downvoted in a hurry.
Java != JEE, and Spring is an independent framework. Java does not have large security issues, apart from browser embedding. JEE is too complex, but I don't hear about security issues. Spring is great, but the documentation is thin, and security is always hard. However, even though I don't work in security, I know enough to check which standards are up-to-date and secure and not to bypass security features in Production.
The article made some valid points, but, overall, it seems a bit biased.