java令牌生成器

import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.util.Random; import sun.misc.BASE64Encoder; //令牌生产器 public class TokenProcessor { private TokenProcessor(){} private static TokenProcessor instance = new TokenProcessor(); public static TokenProcessor getInstance(){ return instance; } public String generateTokeCode(){ String value = System.currentTimeMillis()+new Random().nextInt()+""; //获取数据指纹，指纹是唯一的 try { MessageDigest md = MessageDigest.getInstance("md5"); byte[] b = md.digest(value.getBytes());//产生数据的指纹 //Base64编码 BASE64Encoder be = new BASE64Encoder(); be.encode(b); return be.encode(b);//制定一个编码 } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } return null; } }