welcome to the colorful world！！

js代码$(document).ready(function() { function jump(count, url) { window.setTimeout(function() { count--; if (count > 0) { $("span.remain-second").html(count); jump(count,url);

java  package com.appbox.util.validate;//检查字段非空public class TextUtils { public static boolean isEmpty(String str) { if (str == null) { return true; } if ("".equalsIgnoreCase(