java 过滤敏感字符

package com.java.minganzifu;

import java.util.regex.Matcher;
import java.util.regex.Pattern;



public class Test {
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println(replaceScreenWord("法大功是。。。"));;
	}
	
	/**
	 * 敏感字汇总
	 * 
	 */
	public final static String SENSITIVE_WORDS = "[法].{0,1}[大][功].{0,1};";
	
	/**
	 *  对用户输入内容进行替换（过滤敏感字符）
	 * @param txt
	 */
	public static  String replaceScreenWord(String txt) {
		String  sensitiveWords = SENSITIVE_WORDS;
		String result = txt;
		if (sensitiveWords!=null) {
			String[] words = sensitiveWords.split(";");
			for (int i = 0; i < words.length; i++) {
				System.out.println(words[i]);
				Pattern p = Pattern.compile(words[i]);
				//log.info("o.toString="+p.toString());
				Matcher m = p.matcher(txt);
				if (m.find()) {
					result = m.replaceAll("**");
				}
			}
		}
		return result;
	}

}

使用到的是正则表达式，规则：