Spring Boot手写10万敏感词检查程序

使用Spring Boot手写10万敏感词检查程序

本文将介绍如何使用Spring Boot构建一个高效的敏感词检查系统，能够处理多达10万个敏感词的检测需求。我们将使用DFA（Deterministic Finite Automaton）算法来实现高效匹配，并提供RESTful API接口。

实现步骤

1. 创建Spring Boot项目

首先使用Spring Initializr创建一个新的Spring Boot项目，添加Web依赖：

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
</dependencies>

2. 实现DFA算法敏感词检测

创建敏感词检测服务类：

@Service
public class SensitiveWordFilter {
   
   

    private Map<Object, Object> sensitiveWordMap;

    @PostConstruct
    public void init() {
   
   
        // 从文件或数据库加载敏感词
        Set<String> sensitiveWords = loadSensitiveWords();
        // 构建DFA模型
        sensitiveWordMap = buildDFAModel(sensitiveWords);
    }

    private Set<String> loadSensitiveWords() {
   
   
        // 这里可以从文件、数据库或其他存储加载敏感词
        // 示例代码中硬编码部分敏感词，实际应替换为从文件读取
        Set<String> sensitiveWords = new HashSet<>();
        sensitiveWords.add("敏感词1");
        sensitiveWords.add("敏感词2");
        // ... 添加更多敏感词
        return sensitiveWords;
    }

    private Map<Object, Object> buildDFAModel(Set<String> sensitiveWords) {
   
   
        Map<Object, Object> model = new HashMap<>(sensitiveWords.size());
        Map<Object, Object> currentMap;
        
        for (String word : sensitiveWords) {
   
   
            currentMap = model;
            for (int i = 0; i < word.length(); i++) {
   
   
                char c = word.charAt(i);
                Object wordMap = currentMap.get(c);
                
                if (wordMap == null) {
   
   
                    wordMap = new HashMap<>();
                    currentMap