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RSS订阅原创 2021-04-25
Java实现随机四位数验证码 Java生成随机四位验证码 String str = “abcdefghijklmnopqrstuvwxyz1234567890”; Random random = new Random(); String string[] = new String[4]; String a = “”; for (int i = 0; i < string.length; i++) { int num = ra
2021-04-25 09:07:14
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原创 2021-04-25
Java生成随机四位验证码 String str = “abcdefghijklmnopqrstuvwxyz1234567890”; Random random = new Random(); String string[] = new String[4]; String a = “”; for (int i = 0; i < string.length; i++) { int num = random.nextInt(37); string[i] = str.substring(num, num +
2021-04-25 09:02:57
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