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24. 【Spring Boot】jarの引数(パラメーター)を受け取る方法

プロパティクラスの作成

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
public class AppProperties {
    
    
@Value("${app.mode:A}")
    private String mode;

    public String getMode() {
        return mode;
    }

    public void setMode(String mode) {
        this.mode = mode;
    }
}

上記の例では@Valueに定義したapp.modeをパラメータとして渡すことでmode変数に値が格納される。

コロンの次にデフォルト値を指定することができる。

 

パラメータを渡してjarを実行

java -jar test.jar --app.mode=B

 

パラメータの確認用のサンプルコード

import org.apache.log4j.Logger;
import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@EnableBatchProcessing
public class TestApp implements CommandLineRunner{

    private static Logger log = Logger.getLogger(TestApp.class);

    @Autowired
    AppProperties appProperties;

    
    public static void main(String[] args) {
        SpringApplication.run(TestApp.class, args);
    }
    
    @Override
    public void run(String... args) throws Exception {
        log.info("AppPoroperties.mode: " +
appProperties.getMode());
    }
}

 

出力結果

AppPoroperties.mode: B

 

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同階層のページ
  1. インストール(eclipseプラグイン)
  2. クイックスタート
  3. プロジェクトの作成
  4. Spring Bootプロジェクトの作成
  5. Spring Bootプロジェクトの実行
  6. Spring BootでHello World!
  7. アノテーション一覧
  8. DB接続設定からエンティティおよびリポジトリの作成、値の取得まで(JPA編)
  9. DB接続設定や値の取得(JdbcTemplate編)
  10. ビューから値をモデルに格納しコントローラーで受け取る方法
  11. コントローラーにてモデルに値を格納してビューに渡す方法
  12. テンプレートエンジン
  13. ModelとModelAndViewの違い
  14. AOPの使用方法
  15. classpath:
  16. file:
  17. CSVファイルアップロード方法(Ajax)
  18. CSVファイルダウンロード方法(Ajax)
  19. Spring Bootプロジェクトのビルドと本番環境へのデプロイ方法(内部tomcat使用)
  20. Application.propertiesの環境依存設定の分割方法
  21. JPAにおけるEntityManagerの取得方法
  22. JPAにおけるjava.sql.Connectionの取得方法
  23. エラー一覧
  24. jarの引数を受け取る方法
  25. Spring BootでGmailからメール送信
  26. 複数のDBに接続する設定(Spring Boot & JPA編)
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