/** 判断是否为停止词 */
public static boolean isStopword(char[] text, int off, int len) {
Node node = INSTANCE.getInstance().stopWords.getNode(text, off, len);
return node != null && node.accept();
}
/** 单例, 通过该接口获取实例对象 */
public static StopWords instance() {
return INSTANCE.getInstance();
}