利用UUID 随机生成8位短号

摘要:
//获得8位短号publicstaticString[]chars=newString[]{"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","A","B

//获得8位短号
public static String[] chars = new String[] { "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", "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" };

public static String generateShortUuid() {
  StringBuffer shortBuffer = new StringBuffer();
  String uuid = UUID.randomUUID().toString().replace("-", "");
  for (int i = 0; i < 8; i++) {
    String str = uuid.substring(i * 4, i * 4 + 4);
    int x = Integer.parseInt(str, 16);
    shortBuffer.append(chars[x % 0x3E]);
  }
  return shortBuffer.toString();
}

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