스프링 애플리케이션에서 DataSource 설정 분리

datasource.properties

# DataSource
datasource.driver-class-name=
datasource.url=
datasource.username=
datasource.password=

DataSourceConfig.java

package demo.java.app.config;

import com.zaxxer.hikari.HikariDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

import javax.sql.DataSource;

@Configuration
@PropertySource("classpath:datasource.properties")
public class DataSourceConfig {

    @Value("${datasource.driver-class-name}")
    private String driverClassName;
    @Value("${datasource.url}")
    private String url;
    @Value("${datasource.username}")
    private String username;
    @Value("${datasource.password}")
    private String password;

    @Bean
    public DataSource dataSource() {
        HikariDataSource dataSource = new HikariDataSource();
        dataSource.setDriverClassName(driverClassName);
        dataSource.setJdbcUrl(url);
        dataSource.setUsername(username);
        dataSource.setPassword(password);
        return dataSource;
    }

}