Spring Boot多模块工程如何载入application.properties

在一个pom.xml文件中，包含多个模块，工程结构如下：

Parent-Project
|--MainApplication
|--Module1
|--ModuleN

在工程MainApplication中有main方法和注解SpringBootApplication。这个工程中application.properties 自动被加载的，所有我可以通过@Value来访问相关的key。

@Value("${myapp.api-key}")
private String apiKey;

在 Module1中我也想使用一个properties文件（称为module1.properties），
Within my Module1 I want to use a properties file as well (called module1.properties), where the modules configuration is stored. This File will only be accessed and used in the module. But I cannot get it loaded. I tried it with @Configuration and @PropertySource but no luck.

@Configuration
@PropertySource(value = "classpath:module1.properties")
public class ConfigClass {

How can I load a properties file with Spring-Boot and access the values easily? Could not find a valid solution.

My Configuration

@Configuration
@PropertySource(value = "classpath:tmdb.properties")
public class TMDbConfig {

    @Value("${moviedb.tmdb.api-key}")
    private String apiKey;

    public String getApiKey() {
        return apiKey;
    }

    @Bean
    public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
        return new PropertySourcesPlaceholderConfigurer();
    }
}

Calling the Config

@Component
public class TMDbWarper {

@Autowired
private TMDbConfig tmdbConfig;

private TmdbApi tmdbApi;

public TMDbWarper(){
    tmdbApi = new TmdbApi(tmdbConfig.getApiKey());
}

I’m getting an NullPointerException in the constructor when I autowire the warper.

参考文档
https://stackoverflow.com/questions/46784051/spring-boot-multi-module-project-load-property-file