Java令牌生成器

 package Token;

 import java.security.MessageDigest;

 import java.security.NoSuchAlgorithmException;

 import java.text.SimpleDateFormat;

 import java.util.Date;

 import java.util.Random;

 import Decoder.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()+"";

         System.out.println(value); 

         long currentTime = System.currentTimeMillis();

         SimpleDateFormat formatter = new SimpleDateFormat("yyyy年-MM月dd日-HH时mm分ss秒");

         Date date = new Date(currentTime);

         System.out.println(formatter.format(date));

         //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);

             System.out.println(be.encode(b));

             return be.encode(b);//制定一个编码

         } catch (NoSuchAlgorithmException e){

             e.printStackTrace();

         }

         return null;

     }

     public static void main(String[] args) {

         TokenProcessor processor=new TokenProcessor();

         processor.generateTokeCode();

     }

 }