The difference and practical application of jar_war_ear

First of all, the customary English nomenclature, all of the basic it terminology is named in English or English abbreviations, jar_war_ear, these three abbreviations are all AR end (application Archive) meaning the archive file . The differences in the preceding 3 letters represent the differences in their nature, as shown in the following table:

	JAR	WAR	EAR
English	Java Archive File	Web Archive File	Enterprise Archive File
Include content	class , Properties file, is the smallest unit of file encapsulation;	Servlet , JSP pages, JSP tag Libraries, JAR Library Files , Html/xml documents and other common resource files, slices, audio files, etc.;	in addition to containing JAR , WAR , it also includes EJB Components
Deployment Files	Application-client.xml	Web. XML	Application.xml
level	Small	in	Big

• Jar includes class, war includes Jar,ear including war.

• jar< WAR < EAR

Common cases:

Create an ear project + Create a war project and put the ear in the ear = deploy the ears to was

The difference and practical application of jar_war_ear