This is the 20th day of my participation in the November Gwen Challenge. Check out the details: The last Gwen Challenge 2021

First, JavaWeb concept

1.1 what is JavaWeb

Web resources accessible to the outside world on the Internet are classified into the following types: Static Web resources (such as HTML pages) : The data on a Web page for people to browse remains unchanged. Dynamic Web resources: The data in a Web page for people to browse is generated by the program, and the content of the Web page is different at different points in time. Static Web resource development technology: HTML, CSS. Dynamic Web resource development technology: JavaScript, JSP/Servlet, ASP, PHP, etc. In Java, dynamic Web resource development techniques are collectively known as the Java Web. JavaWeb is developed based on requests and responses.

1.2 Request and Response

A Request is when a client sends data to a server, called a Request.

A Response is when the server sends back data to the client and calls for a Response.

Requests and responses come in pairs, and there is a request and there is a response.

Second, Tomcat server

1. Download Tomcat

Download from tomcat.apache.org/

Select the version to download

2, installation,

Download the Tomcat zip package and decompress it to the required directory.

3. Introduction to tomcat directory


bin	Stores executable programs for the Tomcat server
conf	Store configuration files for the Tocmat server
lib	Stores the JAR package of the Tomcat server
logs	Stores the diary information generated when the Tomcat server is running
temp	Stores temporary data generated while Tomcdat is running
webapps	Stores deployed Web projects
work	Tomcat working directory, used to store Tomcat runtime JSP translation into Servlet source code, and Session passivation directory