微信支付随机串生成

Linux中随机串生成 

hexdump -n 16 -e '4/4 "%08X" 1 "\n"' /dev/random

输出：

5DB67054AD93BD820B6FBC852BA771F0

 

Java中随机串生成

import java.util.Random;
import java.util.stream.Stream;

/**
 * Author: wondream Date: 2021/05/12 Time: 14:18
 */
public class RandomStringGenerator {

    private static final char[] BASE_CHAR = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};

    private static final Random RANDOM = new Random();

    /**
     * 获取一定长度的随机字符串
     *
     * @param length 指定字符串长度
     * @return 一定长度的字符串
     */
    public static String getRandomStringByLength(int length) {
        StringBuilder builder = new StringBuilder();
        Stream.iterate(0, item -> item + 1).limit(length).forEach(i -> builder.append(BASE_CHAR[RANDOM.nextInt(BASE_CHAR.length)]));
        return builder.toString();
    }
}

调用

RandomStringGenerator.getRandomStringByLength(32)