Spring Boot で Rest API 構築

Outline

• 手探りで Spring Boot を勉強しながら Rest API を構築していく
• Qiita にはやった分だけ投稿していく

Create New Project

IntelliJ の Spring Initializr を使う

Spring Initializr

Project SDK: 1.8
Choose Initializr Service URL: Default (https://start.spring.io)

Project Metadata

Group: com.example
Artifact: spring-boot-rest-api
Type: Gradle Project (Generate a Gradle based project archive)
Language: Java
Packaging: Jar
Java Version: 8
Version: 0.0.1-SNAPSHOT
NAME: spring-boot-rest-api
Description: Demo project for Spring Boot
Package: com.example.springbootrestapi

Dependencies

Developer Tools: Spring Boot DevTools, Lombok
Web: Spring Web Starter
SQL: Spring Data JPA, MySQL Driver

Project Settings

Project name: spring-boot-rest-api
Project location: 適宜

Import Module from Gradle

一旦デフォルト設定のまま
OKでプロジェクト作成が完了

IntelliJ で Lombok 有効化

こちらを参照
https://reasonable-code.com/intellij-lombok/

設定ファイルを yml に変更

spring-boot-rest-api/src/main/resources/application.properties

リネームする

spring-boot-rest-api/src/main/resources/application.yml

とりあえず起動してみる

Run ボタンを押す

エラーになった

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-08-17 23:19:54.141 ERROR 29198 --- [  restartedMain] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class


Action:

Consider the following:
	If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
	If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).


Process finished with exit code 0

続きの予告

• エラーの調査
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