Properties 空指针异常 Exception in thread “main“ java.lang.NullPointerException

创建properties的时候注意位置，要创建到根目录下才可访问到

我遇到的错误，希望别人不会遇到

public Person  doMakePerson(){
        //准备配置文件对象
        Properties properties = new Properties();
        //读取配置文件
        InputStream resourceAsStream = MarkPersonFactoryThree.class.getClassLoader().getResourceAsStream("person.properties");

        System.out.println(resourceAsStream);
        try {
            properties.load(resourceAsStream);

            //获得对应的value
            String fullClassName = properties.getProperty("chinese");
            //通过反射创建对应的对象
             Class aClass=Class.forName(fullClassName);

            return (Person) aClass.newInstance();
        } catch (IOException | ClassNotFoundException | InstantiationException | IllegalAccessException e) {
            e.printStackTrace();
        }
        return null;
    }