はじめに
IDE を使わずに、コマンドラインからのみで Spring Boot を始める方法を紹介します。
Spring Boot CLI
Spring Boot CLI は Spring Boot のプロジェクトを新規作成できたりするコマンドラインツールになります。
Mac であればbrewを使ってインストールできます。
brew tap spring-io/tap
brew install spring-boot
Getting Started
docs.spring.io
Spring Boot のプロジェクト作成
spring initで Spring Initializer を使った新規プロジェクトの初期化ができます。
下記だと、依存関係としてspring-boot-starter-web、名前をsample-maven-spring-boot-appの Maven でビルドするプロジェクトを作成できます。
spring init -d=web --build=maven -n=sample-spring-boot-maven-app sample-spring-boot-maven-app設定できるオプションとデフォルト値
設定できるオプションはspring help initで確認できます。
❯ spring help init
spring init - Initialize a new project using Spring Initializr (start.spring.io)
usage: spring init [options] [location]
Option Description
------ -----------
-a, --artifact-id <String> Project coordinates; infer archive name (for
example 'test')
-b, --boot-version <String> Spring Boot version (for example '1.2.0.RELEASE')
--build <String> Build system to use (for example 'maven' or
'gradle') (default: maven)
-d, --dependencies <String> Comma-separated list of dependency identifiers to
include in the generated project
--description <String> Project description
-f, --force Force overwrite of existing files
--format <String> Format of the generated content (for example
'build' for a build file, 'project' for a
project archive) (default: project)
-g, --group-id <String> Project coordinates (for example 'org.test')
-j, --java-version <String> Language level (for example '1.8')
-l, --language <String> Programming language (for example 'java')
--list List the capabilities of the service. Use it to
discover the dependencies and the types that are
available
-n, --name <String> Project name; infer application name
-p, --packaging <String> Project packaging (for example 'jar')
--package-name <String> Package name
-t, --type <String> Project type. Not normally needed if you use --
build and/or --format. Check the capabilities of
the service (--list) for more details
--target <String> URL of the service to use (default: https://start.
spring.io)
-v, --version <String> Project version (for example '0.0.1-SNAPSHOT')
-x, --extract Extract the project archive. Inferred if a
location is specified without an extension
examples:
To list all the capabilities of the service:
$ spring init --list
To creates a default project:
$ spring init
To create a web my-app.zip:
$ spring init -d=web my-app.zip
To create a web/data-jpa gradle project unpacked:
$ spring init -d=web,jpa --build=gradle my-dirspring init --listで設定できるパラメータとデフォルト値が確認できます。
❯ spring init --list
...
Parameters
+-------------+------------------------------------------+------------------------------+
| Id | Description | Default value |
+-------------+------------------------------------------+------------------------------+
| artifactId | project coordinates (infer archive name) | demo |
| bootVersion | spring boot version | 3.0.6 |
| description | project description | Demo project for Spring Boot |
| groupId | project coordinates | com.example |
| javaVersion | language level | 17 |
| language | programming language | java |
| name | project name (infer application name) | demo |
| packageName | root package | com.example.demo |
| packaging | project packaging | jar |
| type | project type | gradle-project |
| version | project version | 0.0.1-SNAPSHOT |
+-------------+------------------------------------------+------------------------------+
