package com.atguigu.surveypark.util;import java.security.MessageDigest;/** * 数据 */public class DataUtil {        /**         * 使用md5算法进行加密          */        public static String md5(String src){                try {                        StringBuffer buffer = new StringBuffer();                        char[] chars = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};                        byte[] bytes = src.getBytes();                        MessageDigest md = MessageDigest.getInstance("MD5");                        byte[] targ = md.digest(bytes);                        for(byte b: targ){                                buffer.append(chars[(b >> 4) & 0x0F]);                                buffer.append(chars[b & 0x0F]);                        }                        return buffer.toString();                } catch (Exception e) {                        e.printStackTrace();                }                return null ;        }}