Replacing Tomcat: Configure Jetty with Spring Boot

 I this article we will learn how to configure Jetty with SpringBoot. I will not use Spring Initializr.

Jetty is fast and lightweight, making it ideal for high-performance applications.
Being modular, it allows enabling only the necessary components, optimizing resource usage.
Jetty efficiently handles high traffic volumes, enabling applications to scale seamlessly.

Add Dependencies to pom.xml:

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" 

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

<modelVersion>4.0.0</modelVersion>

<groupId>com.egga</groupId>

<artifactId>examplejetty</artifactId>

<version>0.1</version>

<packaging>jar</packaging>

<properties>

<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

<maven.compiler.release>21</maven.compiler.release>

</properties>

<dependencies>    

<dependency>

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

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

<exclusions>

<exclusion>

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

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

</exclusion>

</exclusions> 

<version>3.4.2</version>

</dependency>

<!-- Spring Boot Starter -->

<dependency>

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

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

<version>3.4.2</version>

</dependency>

<!-- Jetty as embeded server -->

<dependency>

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

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

<version>3.4.2</version>

</dependency>

<dependency>

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

<artifactId>spring-boot-devtools</artifactId>

<scope>runtime</scope>

<optional>true</optional>

<version>3.4.2</version>

</dependency>

<dependency>

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

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

<scope>test</scope>

<version>3.4.2</version>

</dependency>

</dependencies>

<build>

<plugins>

<plugin>

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

<artifactId>spring-boot-maven-plugin</artifactId>

<version>3.4.1</version>   

</plugin>

</plugins>

</build></project>

Create application.properties file:

the file should inside  src/main/resources folder. The file contains its:

spring.application.name=demo

server.port=9090

Edit the Main Class:

package com.example.demo;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication

public class DemoApplication {

public static void main(String[] args) {

SpringApplication.run(DemoApplication.class, args);

}

}

Creating a Rest Controller:

package com.example.demo;

/**

*

* @author esteban

*/

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

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

@RestController  

public class ExampleController {

@RequestMapping("/")  

public String hello()   

{  

return "Hello World form SpringBoot";  

}  

}

Finally, compile, run, and type the following address in your browser:

http://localhost:9090/

Finally We have a Jetty Web Application runnig with SpringBoot.