PropertyFileConfig.java 文件源码

@Bean
public Properties propertyFactory() throws IOException {
    List<Resource> resources = loadPropertyResource();
    PropertiesFactoryBean factory = new PropertiesFactoryBean();
    factory.setLocations(resources.toArray(new Resource[resources.size()]));
    factory.afterPropertiesSet();
    Properties props = factory.getObject();

    new ConfigAccessor().get()
                        .getProperties()
                        .stream()
                        .forEach(e -> {
                            if (props.getProperty(e._1()) == null) {
                                props.put(e._1(), e._2());
                            }
                        });

    System.getProperties()
          .entrySet()
          .forEach(e -> props.put(e.getKey(), e.getValue()));

    return props;
}