How to convert a .war file into a JAR file?

Question

I did a project based on J2EE framework. Using spring/ hibernate technologies. And used Tomcat as my servlet container. I want to create a JAR file and make my web project executable. This question is asked before but answers are ambiguous.

It is impossible. Diferent platform have diferent formats for executables. — talex, Sep 19 '16 at 12:24
I've read a couple of related questions and they all say basically the same: package your application with your choice of servlet runner (Tomcat, Jetty, ...), so I don't know why you say these answers are ambiguous? — fvu, Sep 19 '16 at 12:24
You can create a maven project with tomcat7 plugin: http://tomcat.apache.org/maven-plugin-trunk/executable-war-jar.html — chenchuk, Sep 19 '16 at 12:25
you could convert the project to Spring Boot application and create an executable Jar file which would be portable I believe. — Jason White, Sep 19 '16 at 12:26
You can easily deploy a `.war` file in tomcat server. Why do you need a `.exe` file? — pahan, Sep 19 '16 at 12:26
I don't believe you can create an exe, youll create an executable JAR file — Jason White, Sep 19 '16 at 12:28
Try [this](http://stackoverflow.com/questions/5591787/convert-war-file-to-exe-file) — pahan, Sep 19 '16 at 12:29
Once you have a JAR, you could use Launch4J to create a Windows Executable. — , Jun 12 '20 at 08:26

score 1 · Accepted Answer · answered Sep 19 '16 at 12:32

Have a look at Spring Boot, this will help you create a jar that can be started with

java -jar <your-jar-file>

It would not need to get deployed into a servlet container, instead it will run with an embedded tomcat. You'd need to install a java runtime wherever you want to run it, though.

See this link for more information.

score 1 · Answer 2 · answered Jun 12 '20 at 06:42

To convert war file to jar in the spring boot, you need to do 3 steps.

convert war to jar in the pom.xml

<packaging>jar</packaging>

extends SpringBootServletInitializer
override configure

public class Your_Application_Name extends SpringBootServletInitializer{

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder springApplicationBuilder){
        return springApplicationBuilder.sources(Your_Application_Name.class);
    }

    public static void main(String[] args) {
        SpringApplication.run(Your_Application_Name.class, args);
    }

How to convert a .war file into a JAR file?

2 Answers2