java实现MD5加密算法，javamd5加密算法,import java.

java实现MD5加密算法，javamd5加密算法,import java.

import java.io.UnsupportedEncodingException;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;public class MD5Util {      public static String generateMD5(String input)      {        MessageDigest messageDigest = null;        try {          messageDigest = MessageDigest.getInstance("MD5");          messageDigest.reset();          messageDigest.update(input.getBytes("UTF-8"));        } catch (NoSuchAlgorithmException e) {          System.out.println("NoSuchAlgorithmException caught!");          System.exit(-1);        } catch (UnsupportedEncodingException e) {          e.printStackTrace();        }        byte[] byteArray = messageDigest.digest();        StringBuffer md5StrBuff = new StringBuffer();        for (int i = 0; i < byteArray.length; i++) {          if (Integer.toHexString(0xFF &amp; byteArray[i]).length() == 1)            md5StrBuff.append("0").append(Integer.toHexString(0xFF &amp; byteArray[i]));          else {            md5StrBuff.append(Integer.toHexString(0xFF &amp; byteArray[i]));          }        }        return md5StrBuff.toString();      }    }