java字符串多个文字同时替换

package com.stock.capital.nmas.common.dto;

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

import org.apache.commons.lang3.StringUtils;

import com.google.common.collect.Maps;

public class testReplace {
    public static void main(String[] args) {
        
        // 替换内容（key：原内容，value：新内容）
        Map<String, String> replaceMenment = Maps.newHashMap();
        replaceMenment.put("C", "<font color='red'>C</font>");
        replaceMenment.put("c", "<font color='red'>c</font>");
        String result2 = replaceString(source, replaceMenment);
        System.out.println("替换结果：" + result2);
    }
    
    public static String replaceString(String source, Map<String, String> replaceMenment) {
        
        if (StringUtils.isEmpty(source) || replaceMenment == null) {
            return source;
        }
        
        String mp = StringUtils.EMPTY;
        for (Entry<String, String> entry : replaceMenment.entrySet()) {
            mp = mp.concat(entry.getKey()).concat("|");
        }
        
        if (StringUtils.isEmpty(mp)) {
            return source;
        }
        
        mp = mp.substring(0, mp.length()-1);
        Pattern p = Pattern.compile(mp);
        Matcher m = p.matcher(source);
        StringBuffer sb = new StringBuffer();
        while (m.find()) {
            if (replaceMenment.get(m.group()) != null) {
                m.appendReplacement(sb, replaceMenment.get(m.group()));
            }
        }
        m.appendTail(sb);
        return sb.toString();
    }
}