是否必须重写servlet init（）或init（ServletConfig配置）和destroy（）方法

Question

您能否告诉我，在我们编写的新servlet（ex：HelloServlet）中重写init（）或init（ServletConfig配置）和destroy（）方法是强制性的吗？

Answer 1

These two methods are a part of the javax.servlet.Servlet interface; so, they must somehow be implemented, either by your servlet or by a base class of your servlet.

Usually, you'd write a servlet that does not directly implement javax.servlet.Servlet , but extend the javax.servlet.GenericServlet class or the javax.servlet.http.HttpServlet class. If you extend either of these, then you don't have to override init or destroy - as long as the superclass' implementation is OK with you.