code: private void loadProfiles() {
      URL convention_default = resources.getGlobal();
      if (null == convention_default) { throw new RuntimeException("cannot find convention-default.properties!"); }
      List<Profile> defaultProfiles = buildProfiles(convention_default, true);
      if (!defaultProfiles.isEmpty()) {
        defaultProfile = defaultProfiles.get(0);
      }
      for (URL url : resources.getLocals()) {
        profiles.addAll(buildProfiles(url, false));
      }
    }
docs: 初始化配置,依次加载META-INF/convention-default.properties,META-INF/convention-route.properties