功能目录

1.CensorWords.txt文件为能过滤的词汇
具体内容略；
2.SensitiveWordFilter为工具类，具体实现过滤的代码

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;/*** @Author : Liuzz* @Description: 敏感词过滤 工具类* @Date : 2018/5/24  09:21* @Modified By :*/
public class SensitiveWordFilter {private StringBuilder replaceAll;//初始化private String encoding = "UTF-8";private String replceStr = "*";private int replceSize = 500;private String fileName = "CensorWords.txt";private List<String> arrayList;/*** 文件要求路径在src或resource下，默认文件名为CensorWords.txt** @param fileName 词库文件名(含后缀)*/public SensitiveWordFilter(String fileName) {this.fileName = fileName;}/*** @param replceStr  敏感词被转换的字符* @param replceSize 初始转义容量*/public SensitiveWordFilter(String replceStr, int replceSize) {this.replceStr = fileName;this.replceSize = replceSize;}public SensitiveWordFilter() {}/*** @param str 将要被过滤信息* @return 过滤后的信息*/public String filterInfo(String str) {StringBuilder buffer = new StringBuilder(str);HashMap<Integer, Integer> hash = new HashMap<Integer, Integer>(arrayList.size());String temp;for (int x = 0; x < arrayList.size(); x++) {temp = arrayList.get(x);int findIndexSize = 0;for (int start = -1; (start = buffer.indexOf(temp, findIndexSize)) > -1; ) {findIndexSize = start + temp.length();//从已找到的后面开始找Integer mapStart = hash.get(start);//起始位置if (mapStart == null || (mapStart != null && findIndexSize > mapStart))//满足1个，即可更新map{hash.put(start, findIndexSize);}}}Collection<Integer> values = hash.keySet();for (Integer startIndex : values) {Integer endIndex = hash.get(startIndex);buffer.replace(startIndex, endIndex, replaceAll.substring(0, endIndex - startIndex));}hash.clear();return buffer.toString();}/*** 初始化敏感词库*/public void InitializationWork() {replaceAll = new StringBuilder(replceSize);for (int x = 0; x < replceSize; x++) {replaceAll.append(replceStr);}//加载词库arrayList = new ArrayList<String>();InputStreamReader read = null;BufferedReader bufferedReader = null;try {read = new InputStreamReader(SensitiveWordFilter.class.getClassLoader().getResourceAsStream(fileName), encoding);bufferedReader = new BufferedReader(read);for (String txt = null; (txt = bufferedReader.readLine()) != null; ) {if (!arrayList.contains(txt))arrayList.add(txt);}} catch (UnsupportedEncodingException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {try {if (null != bufferedReader)bufferedReader.close();} catch (IOException e) {e.printStackTrace();}try {if (null != read)read.close();} catch (IOException e) {e.printStackTrace();}}}public StringBuilder getReplaceAll() {return replaceAll;}public void setReplaceAll(StringBuilder replaceAll) {this.replaceAll = replaceAll;}public String getReplceStr() {return replceStr;}public void setReplceStr(String replceStr) {this.replceStr = replceStr;}public int getReplceSize() {return replceSize;}public void setReplceSize(int replceSize) {this.replceSize = replceSize;}public String getFileName() {return fileName;}public void setFileName(String fileName) {this.fileName = fileName;}public List<String> getArrayList() {return arrayList;}public void setArrayList(List<String> arrayList) {this.arrayList = arrayList;}public String getEncoding() {return encoding;}public void setEncoding(String encoding) {this.encoding = encoding;}
}

3.Demo测试

public class demo {public static void main(String args[]) {SensitiveWordFilter sw = new SensitiveWordFilter();
//        SensitiveWordFilter sw = new SensitiveWordFilter("CensorWords.txt");sw.InitializationWork();long startNumer = System.currentTimeMillis();String str = "这里是要过滤的内容，当里面含有txt文件的词汇时，就会用*****进行替换";System.out.println("被检测字符长度:" + str.length());str = sw.filterInfo(str);long endNumber = System.currentTimeMillis();System.out.println("耗时(毫秒):" + (endNumber - startNumer));System.out.println("过滤之后:" + str);}
}