java.util.regex.PatternSyntaxException: Unclosed counted closure near index 14

java.util.regex.PatternSyntaxException: Unclosed counted closure near index 14

  错误：  request.getParameter("username");
        Pattern p = Pattern.compile("^[0-9A-Za-z]{1-10}");

    正确：request.getParameter("username");
        Pattern p = Pattern.compile("^[0-9A-Za-z]{1,10}");