md5加密

来源：互联网发布：淘宝网ipad下载软件编辑：程序博客网时间：2024/06/05 04:43

将加密后的数据转换为16进制32位的字符串：

private static final char HEX_DIG[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};public static void main(String[] args) throws Exception{//初始化加密器MessageDigest  md5 = MessageDigest.getInstance("MD5");//获取字节数组byte[] resource  = "123".getBytes();//得到加密后的字节数组byte[] result = md5.digest(resource);//转化为16进制32位的字符串System.out.println(getHexString(result));}static String getHexString(byte[] b){StringBuilder sb = new StringBuilder();for(int i= 0; i<b.length;i++){ sb.append( HEX_DIG[b[i]& 0xf0 >>>4]); sb.append( HEX_DIG[b[i]& 0x0f]);}return sb.toString();}

密码和一段字符串相加进行编码可增加破解的难度：

private static final String key = "282328392839283928";public static String md5(String password){try {MessageDigest md = MessageDigest.getInstance("md5");//密码和字符串相加增加破解的难度byte md5[] = md.digest((key+password).getBytes());//进行BASE64编码BASE64Encoder  base64 = new BASE64Encoder();//明文字符串return base64.encode(md5); } catch (NoSuchAlgorithmException e) {throw new RuntimeException(e);}}