Several concepts of Javaweb and the Tomcat directory structure and the directory structure of Web development

Several concepts of Javaweb and the Tomcat directory structure

First, the concept of Javaweb application:

In the Sun's Java Servlet specification, Java Web applications are defined as "Java Web applications are composed of a set of Servlets, HTML pages, classes, and other resources that can be bound ." It can be run in a servlet container that implements a servlet specification from a variety of vendors.

Java Web Apps can include the following:

--Servlet

--JSP

--Practical class

-static documents such as HTML, pictures, etc.

--Description of Web application information (XML)

Second, the concept of the servlet container:

The ①servlet container provides a runtime environment for Javaweb applications, which manages the life cycle of Servlets and JSPs and manages their shared data.

②servlet containers are also known as Javaweb application containers, or servlet/jsp containers

③ currently the most popular servlet container software includes:

--Tomcat

--Resin

--a built-in servlet container is also available in a Java EE server (such as WebLogic)

III. directory Structure of Tomcat

--bin function: A script file that holds the startup and shutdown Tomcat

--Conf effect: Various configuration files for the Tomcat server

--lib role: Store the Tomcat server and the jar files that all Web applications need to access

--Logs function: Log file for tomcat storage

--Temp action: Storing temporary files generated by Tomcat runtime

--WebApps Effect: When publishing a Web application, you typically put the Web application's directory and files in this directory

--Work function: Tomcat places JSP-generated servlet source files and bytecode files in this directory

IV. directory structure developed by Javaweb

① A Web application is a complete application of a set of Servlets, HTML pages, classes, and other resources running on a Web server that exists in a structured, hierarchical directory

② these files that make up a Web application are deployed in the appropriate directory hierarchy, and the root directory represents the "root" of the entire Web application

③ usually put the directory of the Web application in the WebApps directory, each subdirectory in the WebApps directory is a standalone Web application, the name of the subdirectory is the name of the Web application, which is the "root" of the Web application. Users access resources in a Web application through the root of the Web application

The directory hierarchy of the Web application is defined in the servlet specification:

-webcontent role: The root directory of the Web application, all files belonging to this Web application exist under this directory

-web-inf role: The deployment descriptor file that holds the WEB application. xml

-classes role: Storing Servlets and other useful class files

-lib role: Store the jar files that the Web application needs to use, which can contain servlets, beans, and other useful class files

-web.xml role: Contains configuration and deployment information for Web applications

HTML page

JSP page

...

Several concepts of Javaweb and the Tomcat directory structure and the directory structure of Web development