外文翻译——原文
4
After another visit this page to the customer, as long as the paper there have been no
changes, JSP engine has been loaded directly call the Servlet. If you have already been
modified, it will be once again the implementation of the above process, translate, compile
and load. In fact, this is the so-called "first person to punishment." Because when the first
visit to the implementation of a series of the above process, so will spend some time after
such a visit would not.
Java servlets offer a powerful API that provides access to all the information about the
request, the session, and the application. combining JSP with servlets lets you clearly
separate the application logic from the presentation of the application; in other words, it
lets you use the most appropriate component type for the roles of Model, View and
Controller.
Servlets, Filters, and Listeners
A servlet is a Java class that extends a server with functionality for processing a
request and producing a response. It's implemented using the classes and interfaces defined
by the Servlet API. The API consists of two packages: the javax.servlet package contains
classes and interfaces that are protocol-independent, while the javax.servlet.http package
provides HTTP-specific extensions and utility classes.
What makes a servlet a servlet is that the class implements an interface named
javax.servlet.Servlet, either directly or by extending one of the support classes. This
interface defines the methods used by the web container to manage and interact with the
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