首先下载相关包：

• commons-beanutils-1.9.2.jar
• commons-configuration2-2.0.jar
• commons-lang3-3.4.jar
• commons-logging-1.2.jar

Configurations configs = new Configurations();          try {            Configuration config = configs.properties(new File("database.properties"));                        String dbHost = config.getString("database.host");            int dbPort = config.getInt("database.port");            String dbUser = config.getString("database.user");            String dbPassword = config.getString("database.password", "secret");  // provide a default            long dbTimeout = config.getLong("database.timeout");                        System.out.println("dbHost:"+dbHost);            System.out.println("dbPort:"+dbPort);            System.out.println("dbUser:"+dbUser);            System.out.println("dbPassword:"+dbPassword);            System.out.println("dbTimeout:"+dbTimeout);        } catch (ConfigurationException e) {            e.printStackTrace();        }