Dockerizing Spring Boot 3 Application

#docker #springboot

watch video

step : create spring boot project

step : add dependency

step : create controller Package
and inside that package create HelloController class

HelloController.java

package com.example.demo.controller;

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

@RestController
public class HelloController {

    @GetMapping("/hello")
    public String sayHello() {
        return "Hello World";
    }
}

step : first run project as maven clean

step : then run project as maven install

step : inside target folder you will see the jar file

step : run the jar file

for running the jar
fo to the file location of the project

then go inside target folder

open command prompt inside target folder

execute below cmd

test app in browser

step : create Dockerfile inside spring boot project

paste below inside Dockerfile

FROM eclipse-temurin:17-jdk-alpine
VOLUME /tmp
ADD target/SpringBootDocker-0.0.1-SNAPSHOT.jar SpringBootDocker-0.0.1-SNAPSHOT.jar
ENTRYPOINT ["java","-jar","/SpringBootDocker-0.0.1-SNAPSHOT.jar"]

step:open cmd prompt inside the project