java 生成AlphaNumeric字符串

Posted 2021-05-08

public static String getRandomString(int length) {

        //"abcdefghijklmnopqrstuvwxyzABCDEFGHIJLMNOPQRSTUVWXYZ1234567890!@#$%^&*()_+"
        final String characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJLMNOPQRSTUVWXYZ1234567890";
        StringBuilder result = new StringBuilder();
        while(length > 0) {
            Random rand = new Random();
            result.append(characters.charAt(rand.nextInt(characters.length())));
            length--;
        }
        return result.toString();
    }