public static String getRandomString(int length) { //length表示生成字串的長度
    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();  
 }  public static String getRandomString(int length) { //length表示生成字串的長度 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(); }