java自带md5生成方法

import java.security.MessageDigest;import sun.misc.BASE64Encoder;/** * md5 demo * @author kingschan * */public class md5demo{/** * 生成24位的md5字符串 * @param targetStr * @return */public static String getMd5Str(String targetStr){String str = null; //确定计算方法        MessageDigest md5;try {md5 = MessageDigest.getInstance("MD5");BASE64Encoder base64en = new BASE64Encoder();        //加密后的字符串str=base64en.encode(md5.digest(targetStr.getBytes("utf-8")));} catch (Exception e) {e.printStackTrace();}return str;        }}