限制复制html网页信息

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;

}

}