Application.properties file unload with SpringBoot

I actually use spring for a back-end server. I also use SpringBoot for the configuration of all this.

I also need to connect this server to a local database, for now. So I use an application.properties's file.

#Datasource
spring.datasource.url: jdbc:postgresql://localhost:5432/base_temp
spring.datasource.username: postgres
spring.datasource.password: password
spring.datasource.driverClassName: org.postgresql.Driver

#Jpa
jpa.database: POSTGRESQL
jpa.show-sql: true  
jpa.hibernate.ddl-auto: create
jpa.hibernate.dialect: PostgreSQLDialect
jpa.hibernate.namingStrategy: org.hibernate.cfg.ImprovedNamingStrategy

No matter what I put, in spring.datasource.password, I don't have any error in console so I guess the file isn't load.

To solve this I've try to include this in my pom.xml

    <resources>
        <resource>
            <directory>src/main/resources</directory>
            <includes>
                <include>application.properties</include>
            </includes>
            <filtering>true</filtering>
        </resource>
    </resources>

I've also try the @PropertySource or create the Datasource's @Bean myself :

@Bean
public DataSource dataSource() {
    DriverManagerDataSource dataSource = new DriverManagerDataSource();

    dataSource.setDriverClassName("org.postgresql.Driver");
    dataSource.setUrl("jdbc:postgresql://localhost:5432/base_temp");
    dataSource.setUsername("postgres");
    dataSource.setPassword("password");
    return dataSource;
}

But in every cases this back-end was enable to get Data from the database. I don't really know how to use SpringBoot and right know, I'm not incapable to see what's rong with my configuration.