spring boot中如何引入外部application.properties呢?

下文笔者讲述SpringBoot中引入application.properties中的方法分享，如下所示

实现思路:
    使用SpringApplication中setDefaultProperties设置进application.properties
	即可将外部application放入SpringBoot中

例:
SpringBoot引入application.properties的示例

@SpringBootApplication
@EnableScheduling
public class Application {
    public static void main(String[] args) throws Exception {
        Properties prop = new Properties();
        String property = System.getProperty("user.dir");
        System.out.println(property);
        FileInputStream inputStream = new FileInputStream(new File(property) + "/application.properties");
        prop.load(inputStream);
        inputStream.close();
        SpringApplicationBuilder builder = new SpringApplicationBuilder(Application.class);
        SpringApplication app = builder.build();
        app.setDefaultProperties(prop);
        app.run(args);
    }
}