Md5加密方法

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 ;
        }
}