public class Config {
      private static Properties properties;
      private static Logger logger = Logger.getLogger(Config.class);
      static {
           try {
                PropertyConfigurator.configure(System.getProperty("user.dir")
                  + "/config/log4j.properties");
                properties = new Properties();
                // 读取SRC下配置文件 --- 属于读取内部文件
                // properties.load(Config.class.getResourceAsStream("/init.properties"));
                // 读取系统外配置文件 (即Jar包外文件) --- 外部工程引用该Jar包时需要在工程下创建config目录存放配置文件
                String filePath = System.getProperty("user.dir")
                + "/config/init.properties";
                InputStream in = new BufferedInputStream(new FileInputStream(filePath));
                properties.load(in);
           } catch (IOException e) {
                     logger.error("读取配置信息出错！", e);
           }
          }

          public static String getObject(String prepKey) {
                    return properties.getProperty(prepKey);
          }

          public static void main(String[] agrs) {
                   logger.info(Config.getObject("testsql"));
          }
 }