隨機生成6位字母+數字混合密碼

隨機生成6位字母+數字混合密碼

//定義密碼位數 private final static int PWD_LENGTH = 6; public static String getPwdRandom() { String val = ""; Random random = new Random(); //參數length，表示生成幾位隨機數 for(int i = 0; i < PWD_LENGTH; i++) { String charOrNum = random.nextInt(2) % 2 == 0 ? "char" : "num"; //輸出字母還是數字 if( "char".equalsIgnoreCase(charOrNum) ) { //輸出是大寫字母還是小寫字母 int temp = random.nextInt(2) % 2 == 0 ? 65 : 97; val += (char)(random.nextInt(26) + temp); } else if( "num".equalsIgnoreCase(charOrNum) ) { val += String.valueOf(random.nextInt(10)); } } return val; }