Java生成随机字符串的代码

public static String getRandomString(int length) { //length表示生成字符串的长度

    String base = "abcdefghijklmnopqrstuvwxyz0123456789";   

    Random random = new Random();   

    StringBuffer sb = new StringBuffer();   

    for (int i = 0; i < length; i++) {   

        int number = random.nextInt(base.length());   

        sb.append(base.charAt(number));   

    }   

    return sb.toString();   

 }   

原帖转载：http://blog.csdn.net/xiaoyukid/article/details/6041697