public void init() {
    try (
        InputStream is = this.getClass().getClassLoader().getResourceAsStream("sensitive-words.txt");
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));) {
        String keyword;
        while ((keyword = reader.readLine()) != null) {
        // 添加到前缀树
        this.addKeyword(keyword);
        }
    } catch (IOException e) {
        logger.error("加载敏感词文件失败: " + e.getMessage());
    }
    }

private class TrieNode {
    // 关键词结束标识
    private boolean isKeywordEnd = false;

    // 子节点(key是下级字符,value是下级节点)
    private Map<Character, TrieNode> subNodes = new HashMap<>();

    public boolean isKeywordEnd() {
        return isKeywordEnd;
    }

    public void setKeywordEnd(boolean keywordEnd) {
        isKeywordEnd = keywordEnd;
    }

    // 添加子节点
    public void addSubNode(Character c, TrieNode node) {
        subNodes.put(c, node);
    }

    // 获取子节点
    public TrieNode getSubNode(Character c) {
        return subNodes.get(c);
    }
}

private void addKeyword(TrieNode rootNode, String keyword) {
    TrieNode tempNode = rootNode;
    for (int i = 0; i < keyword.length(); i++) {
        char c = keyword.charAt(i);
        TrieNode subNode = tempNode.getSubNode(c);

        if (subNode == null) {
            // 初始化子节点
            subNode = new TrieNode();
            tempNode.addSubNode(c, subNode);
        }

        // 指向子节点,进入下一轮循环
        tempNode = subNode;

        // 设置结束标识
        if (i == keyword.length() - 1) {
            tempNode.setKeywordEnd(true);
        }
    }
}