Analysis of Springmvc, Struts1, Struts2 and SSH2 in the framework of single case and multiple cases

Struts1 is a singleton service, request data binding in the Actionform, form as a parameter into the calling method, without the instance variable will not have concurrency problems.

Spring MVC's Contrller is also the same pattern

Struts2 is every time a new instance is created, its request variable is bound to the action's instance variable, and spring manages the S2 action, because spring's bean defaults to creating only one instance, so the scope must be set to prototype.

Analysis of Springmvc, Struts1, Struts2 and SSH2 in the framework of single case and multiple cases