SecurityRandom随机数生成

package com.netauth.utils;

import java.security.SecureRandom;

/**
 * 
 * <p>
 * SecureRandom随机数生成工具类
 * </p>
 *
 * <p>
 * 版权所有：北京信安世纪科技股份有限公司(c) 2020
 * </p>
 *
 * @author: jlcui
 * @date: 2022年4月20日下午3:42:42
 *
 */
public class SecureRandomUtil {

	/** 定义随机密码位数，设为11位随机数。 */
	protected static int CRYP_STR_LENGTH = 11;

	public static String serial() {

		byte[] b = new byte[CRYP_STR_LENGTH];
		SecureRandom sr = new SecureRandom();
		sr.nextBytes(b);
		String str = str(b);

		return str;
	}

	protected static String str(byte[] b) {
		final char[] str = ("1234567890").toCharArray();
		char[] out = new char[b.length];
		for (int i = 0; i < b.length; i++) {
			int index = b[i] % str.length;
			if (index < 0) {
				index += str.length;
			}
			out[i] = str[index];
		}
		return new String(out);
	}

}

标签：index,随机数,生成,length,SecurityRandom,str,new,SecureRandom,String
来源： https://www.cnblogs.com/cuijinlong/p/16170197.html