如何在Tomcat的多个请求中不保留Static变量？

Question

According to this post Tomcat: Java Static Variable Scope, Application or session wide? Tomcat retains static variable across request, how can it be configured to not keep static variable per request?

Answer 1

No it can't. It is not practical.

The Java Language Specification (JLS) mandates that there is one and only instance of a classes static variables in the entire execution context (ie the JVM).

The only possible "get out" is that it is technically possible to have multiple copies of the same class, each in different classloaders. However, creating a new classloader and loading a new copy of a class for each request would be horribly inefficient, and totally impractical.

The solution is simple:

Don't use statics in your request processing classes.