1.
Properties pro = new Properties();
InputStream is = DruidDemo.class.getClassLoader().getResourceAsStream("druid.properties");
pro.load(is);
DataSource ds=DruidDataSourceFactory.createDataSource(pro);
2.
  URL url = DruidDemo.class.getClassLoader().getResource("druid.properties");
   String path = url.getPath();
   pro.load(new FileReader(path));
  url=pro.getProperty("url");
3. 获取application.properties文件
  ResourceBundle bundle= ResourceBundle.getBundle("application", Locale.CHINA);
  String address=bundle.getString("url")
原文:https://www.cnblogs.com/peoty/p/15139209.html