code: private void initUrl() {
  		if (null != this.clazz) {
  			super.url = this.clazz.getResource(this.path);
  		} else if (null != this.classLoader) {
  			super.url = this.classLoader.getResource(this.path);
  		} else {
  			super.url = ClassLoader.getSystemResource(this.path);
  		}
  		if (null == super.url) {
  			throw new NoResourceException("Resource of path [{}] not exist!", this.path);
  		}
  	}
docs: 根据给定资源初始化URL