code: private void readConfig() {
  		//避免循环引用，Log初始化的时候不使用相关工具类
  		InputStream in = ResourceUtil.getStreamSafe("logging.properties");
  		if(null == in){
  			System.err.println("[WARN] Can not find [logging.properties], use [%JRE_HOME%/lib/logging.properties] as default!");
  			return;
  		}
  		
  		try {
  			LogManager.getLogManager().readConfiguration(in);
  		} catch (Exception e) {
  			Console.error(e, "Read [logging.properties] from classpath error!");
  			try {
  				LogManager.getLogManager().readConfiguration();
  			} catch (Exception e1) {
  				Console.error(e, "Read [logging.properties] from [%JRE_HOME%/lib/logging.properties] error!");
  			}
  		} finally {
  			IoUtil.close(in);
  		}
  	}
docs: 读取ClassPath下的logging.properties配置文件