详细分析Java中的敏感词过滤（附Demo）

前言

敏感词直接过滤，有效防止敏感信息的上传

本文主要给一个启发的思路

1. 简易Demo

通过简易的Demo机制了解基本原理

import java.util.HashSet;
import java.util.Set;public class test {private Set<String> sensitiveWords;public test(Set<String> sensitiveWords) {this.sensitiveWords = sensitiveWords;}public String filter(String text) {for (String word : sensitiveWords) {text = text.replaceAll(word, "***"); // 替换敏感词为 ***}return text;}public static void main(String[] args) {// 构建敏感词库Set<String> sensitiveWords = new HashSet<>();sensitiveWords.add("敏感词1");sensitiveWords.add("敏感词2");sensitiveWords.add("敏感词3");// 创建敏感词过滤器test filter = new test(sensitiveWords);// 测试文本String text = "这是一个包含敏感词1和敏感词2的文本。";// 进行过滤String filteredText = filter.filter(text);// 输出过滤后的文本System.out.println("过滤后的文本：");System.out.println(filteredText);}
}

截图如下：

在这里插入图片描述

2. 进阶Demo

主要丰富敏感词的一些方法功能

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;public class test {private Set<String> sensitiveWords;public test(Set<String> sensitiveWords) {this.sensitiveWords = sensitiveWords;}public String filter(String text) {for (String word : sensitiveWords) {text = text.replaceAll(word, "***"); // 替换敏感词为 ***}return text;}public boolean contains(String text, String word) {return text.contains(word);}public boolean findAll(String text) {for (String word : sensitiveWords) {if (text.contains(word)) {return true;}}return false;}public String findFirst(String text) {for (String word : sensitiveWords) {if (text.contains(word)) {return word;}}return null;}public String replace(String text, String replacement) {for (String word : sensitiveWords) {text = text.replace(word, replacement);}return text;}public String replaceChar(String text, char replacement) {for (String word : sensitiveWords) {text = text.replace(word, String.valueOf(replacement));}return text;}public boolean ignoreCase(String text, String word) {for (String sensitiveWord : sensitiveWords) {if (sensitiveWord.equalsIgnoreCase(word)) {return true;}}return false;}public boolean ignoreWidth(String text, String word) {for (String sensitiveWord : sensitiveWords) {if (text.contains(sensitiveWord) || text.contains(word)) {return true;}}return false;}public void config(Set<String> newSensitiveWords) {this.sensitiveWords = newSensitiveWords;}public static void main(String[] args) {// 构建敏感词库Set<String> sensitiveWords = new HashSet<>();sensitiveWords.add("敏感词1");sensitiveWords.add("敏感词2");sensitiveWords.add("敏感词3");// 创建敏感词过滤器test filter = new test(sensitiveWords);// 测试文本String text = "这是一个包含敏感词1和敏感词2的文本。";// 测试 contains 方法testContains(filter, text);// 测试 findAll 方法testFindAll(filter, text);// 测试 findFirst 方法testFindFirst(filter, text);// 测试 replace 方法testReplace(filter, text);// 测试 replaceChar 方法testReplaceChar(filter, text, '*'); // 传入替换字符// 测试 ignoreCase 方法testIgnoreCase(filter, text);// 测试 ignoreWidth 方法testIgnoreWidth(filter, text);// 测试 config 方法testConfig(filter, new HashSet<>(Arrays.asList("新敏感词1", "新敏感词2")));// 输出过滤后的文本System.out.println("过滤后的文本：");System.out.println(filter.filter(text));}private static void testContains(test filter, String text) {System.out.println("测试 contains 方法：");System.out.println("文本是否包含敏感词1？ " + filter.contains(text, "敏感词1"));System.out.println("文本是否包含敏感词4？ " + filter.contains(text, "敏感词4"));}// 添加其他测试方法...private static void testFindAll(test filter, String text) {System.out.println("测试 findAll 方法：");System.out.println("文本是否包含任何敏感词？ " + filter.findAll(text));}private static void testFindFirst(test filter, String text) {System.out.println("测试 findFirst 方法：");System.out.println("文本中第一个敏感词是： " + filter.findFirst(text));}private static void testReplace(test filter, String text) {System.out.println("测试 replace 方法：");System.out.println("过滤后的文本： " + filter.replace(text, "***"));}private static void testReplaceChar(test filter, String text, char replacement) {System.out.println("测试 replaceChar 方法：");System.out.println("过滤后的文本： " + filter.replaceChar(text, replacement));}private static void testIgnoreCase(test filter, String text) {System.out.println("测试 ignoreCase 方法：");System.out.println("文本是否包含忽略大小写的敏感词？ " + filter.ignoreCase(text, "敏感词1"));}private static void testIgnoreWidth(test filter, String text) {System.out.println("测试 ignoreWidth 方法：");System.out.println("文本是否包含忽略宽度的敏感词？ " + filter.ignoreWidth(text, "敏感词1"));}private static void testConfig(test filter, Set<String> newSensitiveWords) {System.out.println("测试 config 方法：");filter.config(newSensitiveWords);System.out.println("已更新敏感词库。");}
}