Spring Boot – Deploy WAR file to separate Tomcat in maven web application.

Spring Boot – Deploy WAR file to separate Tomcat in maven web application.

This post show how to deploy a spring boot war file to the separate tomcat container in maven.

Step 1 : extends SpringBootServletInitializer subclass and override its configure method.

Typically, update your application’s main class to extend SpringBootServletInitializer. 

For example:

Before extend

package net.mzouabi.ng2.server;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.CrossOrigin;@SpringBootApplication
@CrossOrigin(origins = "http://localhost:4200")public class ServerApplication {
   public static void main(String[] args) {
      SpringApplication.run(ServerApplication.class, args);
   }
}

After extend

package net.mzouabi.ng2.server;



import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.web.bind.annotation.CrossOrigin;



import org.springframework.boot.web.support.SpringBootServletInitializer;

import org.springframework.boot.builder.SpringApplicationBuilder;

import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;

import org.springframework.context.annotation.Bean;



@SpringBootApplication

@CrossOrigin(origins = "http://localhost:4200")

public class ServerApplication extends SpringBootServletInitializer{



   public static void main(String[] args) {

      SpringApplication.run(ServerApplication.class, args);

   }

   @Bean

   public TomcatEmbeddedServletContainerFactory tomcatEmbeddedServletContainerFactory() {

      return new TomcatEmbeddedServletContainerFactory();

   }



   @Override

   protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {

      return application.sources(ServerApplication.class);

   }



}

Step 2: pom.xml changes

need to modify pom.xml to change the packaging to war:

<packaging>war</packaging>

and also need to mark the embedded servlet container dependency as provided.

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-tomcat</artifactId>

<scope>provided</scope>

</dependency>

<dependency>

<groupId>org.apache.tomcat.embed</groupId>

<artifactId>tomcat-embed-jasper</artifactId>

<scope>provided</scope>

</dependency>

Step 3: After that run the maven command mvn package.
I get the following output:

and war file created in the project target as I show in follow:

Step 4: copying the WAR to tomcat webapps. Here the name is important – whatever filename we choose will be used to map HTTP requests to our application.
I get the following output:

Step 5: After that test your war file deployment