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application.xml⚓︎

Overview⚓︎

The application.xml file is an XML configuration file used in Java Enterprise Edition (J2EE) projects. It is used to define the structure and configuration of the application, including its modules and their dependencies. This file plays a crucial role in the deployment and execution of the application within a J2EE container.

Table of Contents⚓︎

  1. Prerequisites
  2. Usage
  3. Methods
  4. Useful details

Prerequisites⚓︎

There are no specific prerequisites for using the application.xml file. However, it is typically used in J2EE projects and requires a J2EE-compliant container for deployment.

Usage⚓︎

To use the application.xml file in a J2EE project, follow these steps: 1. Create the application.xml file in the META-INF directory of the application. 2. Define the modules and their configurations within the <application> tag. 3. Ensure that the file adheres to the J2EE XML schema.

Methods⚓︎

The application.xml file does not contain methods or functions in the traditional sense, as it is an XML configuration file. However, it defines the structure of the application and its modules using XML elements and attributes.

Useful details⚓︎

  • The display-name element specifies the display name of the application.
  • The web and ejb elements define the web and EJB modules, respectively, along with their URIs and context roots.
  • The id and version attributes uniquely identify the application and its version.

CODE⚓︎

<?xml version="1.0" encoding="UTF-8"?>
<application id="Application_ID" version="1.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/application_1_4.xsd">
    <display-name>app-ear</display-name>
    <module id="WebModule_1547293644829">
        <web>
            <web-uri>app-web.war</web-uri>
            <context-root>app-web</context-root>
        </web>
    </module>
    <module id="EjbModule_1547316559855">
        <ejb>app-ejb.jar</ejb>
    </module>
</application>