java 敏感词汇分析程序

可以使用 Trie 树（字典树）实现敏感词汇的分析程序。以下是一个简单的 Java 实现：

public class SensitiveWordsAnalyzer {
    private TrieNode root;

    public SensitiveWordsAnalyzer() {
        root = new TrieNode();
    }

    public void addSensitiveWord(String word) {
        TrieNode node = root;
        for (char c : word.toCharArray()) {
            if (!node.containsKey(c)) {
                node.put(c, new TrieNode());
            }
            node = node.get(c);
        }
        node.setEnd();
    }

    public boolean containsSensitiveWords(String text) {
        TrieNode node = root;
        for (int i = 0; i < text.length(); i++) {
            char c = text.charAt(i);
            if (node.containsKey(c)) {
                node = node.get(c);
                if (node.isEnd()) {
                    return true;
                }
            } else {
                node = root;
            }
        }
        return false;
    }

    private static class TrieNode {
        private TrieNode[] children;
        private boolean isEnd;

        public TrieNode() {
            children = new TrieNode[256];
        }

        public boolean containsKey(char c) {
            return children[c] != null;
        }

        public TrieNode get(char c) {
            return children[c];
        }

        public void put(char c, TrieNode node) {
            children[c] = node;
        }

        public boolean isEnd() {
            return isEnd;
        }

        public void setEnd() {
            isEnd = true;
        }
    }
}

使用示例：

SensitiveWordsAnalyzer analyzer = new SensitiveWordsAnalyzer();
analyzer.addSensitiveWord("敏感词汇1");
analyzer.addSensitiveWord("敏感词汇2");

String text = "这是一段包含敏感词汇1和敏感词汇2的文本";
if (analyzer.containsSensitiveWords(text)) {
    System.out.println("文本中包含敏感词汇");
} else {
    System.out.println("文本中不包含敏感词汇");
}

输出结果为：

文本中包含敏感词汇