Zenn
🌼

SpringBootしてみた

2021/12/31に公開
Docker
Gradle
Java
Spring
Lombok
tech

jdk install

https://jdk.java.net/17/
macOS/x64をダウンロード

memo
#ダウンロードしたファイルのsha256が正しいことを確認
Downloads $ shasum -a 256 openjdk-17.0.1_macos-x64_bin.tar.gz                                              
6ccb35800e723cabe15af60e67099d1a07c111d2d3208aa75523614dde68bee1  openjdk-17.0.1_macos-x64_bin.tar.gz
Downloads $ cat openjdk-17.0.1_macos-x64_bin.tar.gz.sha256 
6ccb35800e723cabe15af60e67099d1a07c111d2d3208aa75523614dde68bee1
Downloads $
jdk install
Downloads $ tar xzvf openjdk-17.0.1_macos-x64_bin.tar.gz
Downloads $ sudo mv jdk-17.0.1.jdk /Library/Java/JavaVirtualMachines
Downloads $ java -version 
openjdk version "17.0.1" 2021-10-19
OpenJDK Runtime Environment (build 17.0.1+12-39)
OpenJDK 64-Bit Server VM (build 17.0.1+12-39, mixed mode, sharing)

init

https://start.spring.io/
この画面と同じことが、vscodeの拡張でできる
https://marketplace.visualstudio.com/items?itemName=vscjava.vscode-spring-initializr
command + shift + pで
spring initializr
と打つと出てくるので、選択していきます

  • Spring Boot version 2.6.2
  • packageing type Jar
  • java version 17
  • gradle
  • depencies Spring Web,Lombok

作成したプロジェクトでvscodeを開く
プロジェクトフォルダに移動して開き直さないと、vscodeでパッケージ部分に警告が出てしまう。。。

memo 
#vscodeをカレントディレクトリで開く
code .

Building a RESTful Web Service

https://spring.io/guides/gs/rest-service/

package com.example.restservice;

import lombok.AllArgsConstructor;
import lombok.Data;

@Data
@AllArgsConstructor
public class Greeting {

	private final long id;
	private final String content;
}

この拡張を入れないとvscodeでlombokが効かない
https://marketplace.visualstudio.com/items?itemName=GabrielBB.vscode-lombok

GreetingController
package com.example.restservice;

import java.util.concurrent.atomic.AtomicLong;


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

@RestController
public class GreetingController {

	private static final String template = "Hello, %s!";
	private final AtomicLong counter = new AtomicLong();

	@GetMapping("/greeting")
	public Greeting greeting(@RequestParam(value = "name", defaultValue = "World") String name) {
		return new Greeting(counter.incrementAndGet(), String.format(template, name));
	}
}
RestserviceApplication
package com.example.restservice;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class RestserviceApplication {

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

}
build.gradle
plugins {
	id 'org.springframework.boot' version '2.6.2'
	id 'io.spring.dependency-management' version '1.0.11.RELEASE'
	id 'java'
}

group = 'com.example'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '17'

configurations {
	compileOnly {
		extendsFrom annotationProcessor
	}
}

repositories {
	mavenCentral()
}

dependencies {
	implementation 'org.springframework.boot:spring-boot-starter-web'
	compileOnly 'org.projectlombok:lombok'
	annotationProcessor 'org.projectlombok:lombok'
	testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

test {
	useJUnitPlatform()
}

run

restservice $ ./gradlew bootRun

http://localhost:8080/greeting

build

restservice $ ./gradlew build

jarで実行

restservice $ java -jar build/libs/restservice-0.0.1-SNAPSHOT.jar

http://localhost:8080/greeting

docker

build/libs/restservice-0.0.1-SNAPSHOT-plain.jar が不要で邪魔なので生成しないようにする

build.gradle追記
jar {
	enabled = false
}

restservice $ ./gradlew clean
restservice $ ./gradlew build
Dockerfile
FROM openjdk:17.0.1-slim-buster
ARG JAR_FILE=build/libs/*.jar
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java","-jar","/app.jar"]

# イメージ作成
restservice $ docker build -t springboot .

# 起動
restservice $ docker run --rm -d -p 8080:8080 --name spring springboot     

restservice $ docker ps
CONTAINER ID   IMAGE               COMMAND                CREATED              STATUS              PORTS                    NAMES
fd630f4123b8   springboot/docker   "java -jar /app.jar"   About a minute ago   Up About a minute   0.0.0.0:8080->8080/tcp   spring

# ログ確認
restservice $ docker logs spring

http://localhost:8080/greeting

restservice $ docker stop spring

link

https://projectlombok.org/features/all

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