方式一：
URL url = 类名.
class.getClassLoader().getResource("conf.properties"
);
File file =
new File(url.getFile());
方式二：
InputStream is = 类名.
class.getClassLoader().getResourceAsStream("conf.properties");
转载于:https://www.cnblogs.com/lichuanyan/p/11454231.html
