java怎么获取随机字符串

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在 Java 中获取随机字符串通常有两种方式：

使用 Random 类生成随机字符序列

import java.util.Random;

public class RandomStringGenerator {private static final String CHARACTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

    public static String generateRandomString(int length) {StringBuilder sb = new StringBuilder();
        Random random = new Random();
        for (int i = 0; i < length; i++) {int index = random.nextInt(CHARACTERS.length());
            sb.append(CHARACTERS.charAt(index));
        }
        return sb.toString();}

    public static void main(String[] args) {String randomString = generateRandomString(10);
        System.out.println(randomString);
    }
}

使用 UUID 类生成随机字符串

import java.util.UUID;

public class RandomStringGenerator {public static String generateRandomString() {return UUID.randomUUID().toString().replaceAll("-", "");
    }

    public static void main(String[] args) {String randomString = generateRandomString();
        System.out.println(randomString);
    }
}