Servlet working principle (Read Xilingpo "in-depth analysis of Javaweb Technology Insider") notes

Before we introduce how servlets work, let's first look at the servlet containers that are matched to the servlet, for example, in Tomcat

Basic knowledge of 1.Tomcat containers

The container for Tomcat is classified into four levels from the top below: Container,engine,host,context.

The container that manages the servlet directly is the context container. A context container in Tomcat corresponds to a web App app

2.servlet container Start-up process

When you add an app to Tomcat, Tomcat creates a servlet container of type Standardcontext. And will add some basic parameters to the container, such as the access path, the most important thing for this container

Add a servletconfig.

Servlet working principle (Read Xilingpo "in-depth analysis of Javaweb Technology Insider") notes