Java字符串脱敏工具类

首先引入依赖

    commons-io
    commons-io
    2.2


    org.apache.commons
    commons-lang3
    3.0

敏感字段文件：wordfilter.txt

共产党

 Java工具类：

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
 
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.LineIterator;
import org.apache.commons.lang3.StringUtils;
 
/**
 * 
  * ClassName: 敏感字段处理工具类 
  
  * Function: TODO ADD FUNCTION. 
  
  * Reason: TODO ADD REASON(可选). 
  
  * date: 2018年5月18日 下午16:02:37 
  
  *  
  * @author huangSir 
  * @version   
  * @since JDK 1.6
 */
public class SensitiveWordUtils {
 
	private final static File wordfilter = new File("C:/wordfilter.txt");
	private static List words = new ArrayList();
	
	static {
		synchronized(SensitiveWordUtils.class){
			try{
				LineIterator lines = FileUtils.lineIterator(wordfilter, "utf-8");
				boolean flag = false;
				while(lines.hasNext()){
					String line = lines.nextLine();
					if(!flag){
						if(line.length()>1){
							line=line.substring(1);
						}
						flag = true;
					}
					if(StringUtils.isNotBlank(line))
						words.add(StringUtils.trim(line).toLowerCase());
				}
			}catch(IOException e){
				e.printStackTrace();
			}
		}
	}
	
	/**
	 * 检查敏感字内容
	 * @param contents
	 */
	public static String check(String ...contents) {
		if(!wordfilter.exists()){
			return null;
		}
		for(String word : words){
			for(String content : contents)
				if(content!=null && content.indexOf(word) >= 0)
					return word;
		}
		return null;
	}
	
	/**
	 * 检查字符串是否包含敏感词
	 *
	 * @param content
	 * @return
	 */
	public static boolean isContain(String content) {
	    if(!wordfilter.exists())
	        return false;
	    for(String word : words){
            if(content!=null && content.indexOf(word) >= 0)
                return true;
	    }
	    return false;
	}
	
	/**
	 * 字符串中的敏感词用*替换
	 *
	 * @param str
	 * @return
	 */
	public static String desensitization(String str){
        for(String word : words){
            if(str.indexOf(word)>=0){
                String reChar = "";
                for(int i=0;i getSensitiveWords() {
		return words;
	}
	
	/**
	 * 添加敏感词
	 *
	 * @param word
	 * @throws IOException
	 */
	public static void addSensitiveWord(String word) throws IOException {
		word = word.toLowerCase();
		if(!words.contains(word)){
			words.add(word);
			FileUtils.writeLines(wordfilter, "UTF-8", words);
		}
	}
 
	/**
	 * 删除敏感词
	 *
	 * @param word
	 * @throws IOException
	 */
	public static void deleteSensitiveWord(String word) throws IOException {
		word = word.toLowerCase();
		if(words.contains(word)){
			words.remove(word);
			FileUtils.writeLines(wordfilter, "UTF-8", words);
		}
	}
	
	public static void main(String[] args) throws Exception{
		System.out.println(desensitization("中国共产党万岁"));;
    }
	
}

运行结果：