MD5加密

package com.nj.Encryption;

import java.security.MessageDigest;


/**
* @author ZM
* MD5加密算法
*/
public class EncrypMD5 {
private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5",
             "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };

     /**
      * 转换字节数组为16进制字串
      *
      * @param b
      *            字节数组
      * @return 16进制字串
      */

     public static String byteArrayToHexString(byte[] b) {
         StringBuffer resultSb = new StringBuffer();
         for (int i = 0; i < b.length; i++) {
             resultSb.append(byteToHexString(b[i]));
         }
         return resultSb.toString();
     }

     private static String byteToHexString(byte b) {
         int n = b;
         if (n < 0)
             n = 256 + n;
         int d1 = n / 16;
         int d2 = n % 16;
         return hexDigits[d1] + hexDigits[d2];
     }

     public static String MD5Encode(String origin) {
         String resultString = null;

         try {
             resultString = new String(origin);
             MessageDigest md = MessageDigest.getInstance("MD5");
             resultString = byteArrayToHexString(md.digest(resultString
                     .getBytes()));
         } catch (Exception ex) {

         }
         return resultString;
     }


public static void main(String[] args){
System.err.println(MD5Encode("sdafdsafs"));
}
}