MD5加密

generateDigest("jinghuajuanke","MD5");

 

 

public static String generateDigest(String info, String algorithm) {
  String infoDigest = "";
  try {

   java.security.MessageDigest alga = java.security.MessageDigest.getInstance(algorithm);

   alga.update(info.getBytes());

   byte[] digesta = alga.digest();

   infoDigest = byte2hex(digesta);

  } catch (Exception e) {
   e.printStackTrace();
  }
  return infoDigest;
 }
 
 /**
  * 二行制轉化成十六進制字符串
  * 
  * @param b
  * @return
  */
 public static String byte2hex(byte[] b) {
  String hs = "";
  String stmp = "";
  for (int n = 0; n < b.length; n++) {
   stmp = (java.lang.Integer.toHexString(b[n] & 0XFF));
   if (stmp.length() == 1)
    hs = hs + "0" + stmp;
   else
    hs = hs + stmp;
   /*if (n < b.length - 1)
    hs = hs + ":";*/
  }
  return hs.toUpperCase();
 }