Programming

  minte9
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Spring Boot / Quick Start

Controller

Use start.spring.io to create a web project. 
 
/**
 * Spring Boot is the most popular way to start Spring projects.
 * Spring Boot is built on top of the spring framework.
 *
 * Start by creating a new Spring Web project ... 
 * by opening intializer on start.spring.io
 */

package com.minte9.quick_start;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@RestController
public class DemoApplication {

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

    @GetMapping("/")
    public String welcome() {
        return "Welcome";
    }

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

}

Build

The application build configuration is defined in 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 
        https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.4</version>
        <relativePath/>
    </parent>
    <groupId>com.minte9</groupId>
    <artifactId>appSpringBootDemmo</artifactId>
    <version>0.0.1</version>
    <name>quick_start</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>11</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

Run

Build and run the application using Maven and test embedded Apache Tomcat server. 
 
mvn spring-boot:run
http://localhost:8080/hello
    # Hello World

mvn package # compile and build
java -jar quick_start.jar
    # Hello World




References