Servlet is managed by the servlet container, the container manages the entire lifecycle of the servlet. When the servlet container startup, it will initialize several servlet instances, at this time the servlet init() method will be invoked. When the servlet container receives an HTTP request, it will execute the servlet’s service() method, and when the …
There are a lot of xml elements in web.xml in a web application project. And the most important two we will introduce are welcome-file-list and load-on-startup. welcome-file-list is used to display the default web page to a user when user do not point out which page he want to browse in url. load-on-startup is used to …
Java EE application is a packaged software which run in Java EE application server. There are two types of it. One is for web usage which is a packaged file with .war extension and the other is for enterprise usage which is a packaged file with .ear as extension. There are a lot of components in those …
There are so many clients and servers exist in the word wide web. Today they are all connected together in a network which is called WWW network. They are connected use wires or wireless devices such as WIFI route. When you use your client such as iPhone to browse a page in the web. Your …
