web.xml和pom.xml文档

Question

I need documentation about web.xml and pom.xml files. i would like learn web develop, so i start some tutorials about that. I use IDE eclipse and i choose the option maven project for develop the tutorials. i dont have errors but i cant deploy the projects in web. May be my problems are that i not understand in totality the concept of this files. Some documentation about this i sure that help me. I searched in Satck, in foros but i dont found documentation. I wonder how web developers know the code they need these files

Answer 1

web.xml is web application configuration file defines the servlet container used in the application. You can typically add start-up code, url-pattern as this will be called on application start. Example below extracted from Jersey RestFull service.

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" 
id="WebApp_ID" version="3.0">
    <servlet>
        <servlet-name>Jersey Web Application</servlet-name>
        <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
        <init-param>
            <param-name>jersey.config.server.provider.packages</param-name>
            <param-value>com.xxxx.shopper</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
         <async-supported>true</async-supported>
    </servlet>
    <servlet-mapping>
        <servlet-name>Jersey Web Application</servlet-name>
        <url-pattern>/webapi/*</url-pattern>
    </servlet-mapping>
      <listener>
        <listener-class>com.xxxx.shopper.service.Startup</listener-class>
    </listener>
</web-app>

pom.xml is maven configuration file defines build process and loads any dependencies.

Good Reads:
1. https://www.mkyong.com/maven/how-to-create-a-web-application-project-with-maven/
2. Difference between web projects with pom.xml and web.xml
3. Why do we use web.xml?