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I'm about to build my first website in Java with Spring Framework using Spring Boot and it's much easier to build it in jar, but I have a few questions about it.
What are the differences in general?
In jar files the views are under /resources/templates, but in war file it's under /webapp/WEB-INF/.
What are the differences? Can I deploy a jar on an online host?
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Definition. A JAR file is a file with Java classes, associated metadata and resources such as text, images aggregated into one file. A WAR file is a file that is used to distribute a collection of JAR files, JSP, Servlet, XML files, static web pages like HTML and other resources that constitute a web application.
The WAR file (Web Application Resource or Web Application ARchive) is a container for JAR files, JavaServer Pages, Java Servlets, Java classes, XML files, tag libraries, static sites (HTML and associated files), and other resources that make up an online application. A file entitled web.
A package is a mechanism in Java for organizing classes into namespaces. A jar is a Java ARchive, a file that aggregates multiple Java classes into one.
Run the mvn package command and you have successfully converted your spring boot application from JAR into a WAR file. You can safely deploy these WAR files on application servers like Tomcat, GlassFish etc.
Run the mvn package command and you have successfully converted your spring boot application from JAR into a WAR file. You can safely deploy these WAR files on application servers like Tomcat, GlassFish etc. This article concentrates on the default form login implementation from Spring Boot and Spring Security.
See below: A .war file is a Web Application Archive which runs inside an application server while a .jar is Java Application Archive that runs a desktop application on a user's machine. So, if you want multiple applications running under same application server choose war.
There are spring-boot plugins for various build systems. Here is the one for maven: spring-boot-maven-plugin To execute the kind of fat *.jar you could simple run command: The other option is to ship your application as old-fashioned war file.
Unfortunately, if we are working with a jar package, the basic Maven package goal doesn't include any of the external dependencies. This means that we can use it only as a library in a bigger project. To circumvent this limitation, we need to leverage the Maven Spring Boot plugin repackage goal to run our jar/war as a stand-alone application. 4.1.
Spring Boot can be told to produce a 'fat JAR' which includes all of your module/service's dependencies and can be run with java -jar <your jar>. See "Create an executable JAR with Maven" here.
Spring Boot can also be told to produce a WAR file, in which case you'll likely choose to deploy it to a web container such as Tomcat or Jetty.
Plenty more details on Spring Boot deployment here.
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