package com.zq.utils.encryption;

import java.util.Random;

import org.apache.shiro.crypto.hash.Sha256Hash;

import com.zq.utils.string.StringUtils;

/**

*

* Created by MyEclipse. Author: ChenBin E-mail: chenb@8000056.com Date:

* 2016-5-23 Time: 下午3:10:37 Company: HuNan BwWan information technology co.,LTD

* Web sites: http://www.8000056.com/

*/

public class Sha256Utils {

/**

* Description : 加密

*

* @author : ChenBin

* @date : 2016-3-11 上午11:05:16

*/

public static String exec(String passWd, String salt) {

if (StringUtils.compareTrim(passWd, salt))

return new Sha256Hash(passWd, salt).toString();

return null;

}

/**

* Description :产生指定长度密码盐

*

* @author : ChenBin

* @date : 2016-3-11 上午11:24:22

* @param :

* scope-产生密码盐的字符取值范围

* @param :

* length-密码盐长度

*/

public final static String getSalt(String scope, int length) {

if (!StringUtils.compareTrim(scope))

return "";

int len = scope.length();

Random random = new Random();

StringBuffer sb = new StringBuffer();

for (int i = 0; i < length; i++) {

int num = random.nextInt(len);

sb.append(scope.charAt(num));

}

return sb.toString();

}

public static void main(String[] args) {

String scope = "abcdefghijklmnopqrstuvwxyz";

System.out.println(Sha256Utils.getSalt(scope, 4));

}

}

这个是java 代码怎么不能选择java区啊