public class ConfigManager { ? ? ? ? ? ? ? ? ? ? ?//讀取配置文件的工具類，單例模式? private static ConfigManager configManager; private static Properties properties; private ConfigManager() { ? ? ? ? ? ?//必須以private修飾 String configFile = "database.properties"; properties = new Properties();? InputStream is = ConfigManager.class.getClassLoader().getResourceAsStream(configFile); try { properties.load(is); is.close(); } catch (IOException e) { e.printStackTrace(); } }