java实现屏蔽词功能

 /** *@Description: 屏蔽词功能实现 */ package cn.yicha.novel.search.util; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStreamReader; import java.util.HashSet; import cn.yicha.novel.search.config.Config; public class Forbidden { private static Forbidden forbidden = new Forbidden(); //屏蔽词HashSet private HashSet keyString = new HashSet(); private final static int maxLength = Character.MAX_VALUE; //屏蔽词长度HashSet数组 @SuppressWarnings("unchecked") private HashSet[] keyLength = new HashSet[maxLength]; private Forbidden() { loadForbidden(Config.getClassRoot() + "forbidden.txt"); } public static Forbidden getForbidden(){ return forbidden; } /** * @param str * @return * @Description: 输入的字符串通过屏蔽处理，实现最大长度匹配 */ public String read(String str){ if (str == null){ return null; } StringBuffer stringBuffer = new StringBuffer(); int start = 0; for (int i = 0; i  ml ? len : ml; } } } if (ml > 0){ stringBuffer.append(str.substring(start, i)).append("***"); i += ml; start = i; } else { i++; } } } if (start 用于存储所有的屏蔽词 * @Description: 构建长度为maxLength = Character.MAX_VALUE 的 HashSet数组 * @Description: 将加载的屏蔽中第一个字符转化成int值，即相关信息存储在数组中的位置， * @Description: 如“你好呀”得到'你'的int值为20320，即“你好呀”相关信息存储在数组的第20320位置 * @Description: 数组每一位存储的HashSet结构存储在该位置的屏蔽词的长度 */ public void loadForbidden(String path){ File forbiddenFile = new File(path); FileInputStream fileInputStream; try { fileInputStream = new FileInputStream(forbiddenFile); InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream, "utf-8"); BufferedReader bufferedReader = new BufferedReader(inputStreamReader); String s; while ((s = bufferedReader.readLine()) != null){ s = s.trim(); if (s.length() > 0){ keyString.add(s); int i = s.charAt(0); if (keyLength[i] == null){ //屏蔽词长度HashSet HashSet a = new HashSet(); a.add(s.length()); keyLength[i] = a; } else { keyLength[i].add(s.length()); } } } fileInputStream.close(); bufferedReader.close(); fileInputStream.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } public static void main(String[] args) { //  System.out.println(Forbidden.getForbidden().read("AV女优nihao")); int i = '你'; System.out.println(i); } }