gravatar 头像功能的 java 代码，gravatarjava,import java.

gravatar 头像功能的 java 代码，gravatarjava,import java.

import java.util.*;import java.io.*;import java.security.*;public class MD5Util {  public static String hex(byte[] array) {      StringBuffer sb = new StringBuffer();      for (int i = 0; i < array.length; ++i) {      sb.append(Integer.toHexString((array[i]          & 0xFF) | 0x100).substring(1,3));              }      return sb.toString();  }  public static String md5Hex (String message) {      try {      MessageDigest md =           MessageDigest.getInstance("MD5");      return hex (md.digest(message.getBytes("CP1252")));      } catch (NoSuchAlgorithmException e) {      } catch (UnsupportedEncodingException e) {      }      return null;  }}//该片段来自于http://byrx.net