This article describes the method of randomly generating mobile phone SMS verification codes in Java. Share it for your reference, as follows:
/*** Create a random string with a specified number* @param numberFlag Whether it is a number* @param length* @return*/public static String createRandom(boolean numberFlag, int length){ String retStr = ""; String strTable = numberFlag ? "1234567890" : "1234567890abcdefghijkmnpqrstuvwxyz"; int len = strTable.length(); boolean bDone = true; do { retStr = ""; int count = 0; for (int i = 0; i < length; i++) { double dblR = Math.random() * len; int intR = (int) Math.floor(dblR); char c = strTable.charAt(intR); if (('0' <= c) && (c <= '9' )) { count++; } retStr += strTable.charAt(intR); } if (count >= 2) { bDone = false; } } while (bDone); return retStr;}I hope this article will be helpful to everyone's Java programming.