JS通用方法扩展

• /*
• * 系统中JS的扩展函数
• *
• *
• */
• // 清除两边的空格
• String.prototype.trim = function() {
• returnthis.replace(/(^\s*)|(\s*$)/g, '');
• };
• // 合并多个空白为一个空白
• String.prototype.ResetBlank = function() {
• var regEx = /\s+/g;
• returnthis.replace(regEx, ' ');
• };
• // 保留数字
• String.prototype.GetNum = function() {
• var regEx = /[^\d]/g;
• returnthis.replace(regEx, '');
• };
• // 保留中文
• String.prototype.GetCN = function() {
• var regEx = /[^\u4e00-\u9fa5\uf900-\ufa2d]/g;
• returnthis.replace(regEx, '');
• };
• // String转化为Number
• String.prototype.ToInt = function() {
• return isNaN(parseInt(this)) ? this.toString() : parseInt(this);
• };
• // 得到字节长度
• String.prototype.GetLen = function() {
• var regEx = /^[\u4e00-\u9fa5\uf900-\ufa2d]+$/;
• if (regEx.test(this)) {
• returnthis.length * 2;
• } else {
• var oMatches = this.match(/[\x00-\xff]/g);
• var oLength = this.length * 2 - oMatches.length;
• return oLength;
• }
• };
• // 获取文件全名
• String.prototype.GetFileName = function() {
• var regEx = /^.*\/([^\/\?]*).*$/;
• returnthis.replace(regEx, '$1');
• };
• // 获取文件扩展名
• String.prototype.GetExtensionName = function() {
• var regEx = /^.*\/[^\/]*(\.[^\.\?]*).*$/;
• returnthis.replace(regEx, '$1');
• };
• /******add By 刘景宁 2010-12-09 *******/
• String.prototype.replaceAll = function(reallyDo, replaceWith, ignoreCase) {
• if (!RegExp.prototype.isPrototypeOf(reallyDo)) {
• returnthis.replace(new RegExp(reallyDo, (ignoreCase ? "gi" : "g")), replaceWith);
• } else {
• returnthis.replace(reallyDo, replaceWith);
• }
• };
• //格式化字符串 add By 刘景宁 2010-12-09
• String.Format = function() {
• if (arguments.length == 0) {
• return'';
• }
• if (arguments.length == 1) {
• return arguments[0];
• }
• var reg = /{(\d+)?}/g;
• var args = arguments;
• var result = arguments[0].replace(reg, function($0, $1) {
• return args[parseInt($1) + 1];
• });
• return result;
• };
• // 数字补零
• Number.prototype.LenWithZero = function(oCount) {
• var strText = this.toString();
• while (strText.length < oCount) {
• strText = '0' + strText;
• }
• return strText;
• };
• // Unicode还原
• Number.prototype.ChrW = function() {
• return String.fromCharCode(this);
• };
• // 数字数组由小到大排序
• Array.prototype.Min2Max = function() {
• var oValue;
• for (var i = 0; i < this.length; i++) {
• for (var j = 0; j <= i; j++) {
• if (this[i] < this[j]) {
• oValue = this[i];
• this[i] = this[j];
• this[j] = oValue;
• }
• }
• }
• returnthis;
• };
• // 数字数组由大到小排序
• Array.prototype.Max2Min = function() {
• var oValue;
• for (var i = 0; i < this.length; i++) {
• for (var j = 0; j <= i; j++) {
• if (this[i] > this[j]) {
• oValue = this[i];
• this[i] = this[j];
• this[j] = oValue;
• }
• }
• }
• returnthis;
• };
• // 获得数字数组中最大项
• Array.prototype.GetMax = function() {
• var oValue = 0;
• for (var i = 0; i < this.length; i++) {
• if (this[i] > oValue) {
• oValue = this[i];
• }
• }
• return oValue;
• };
• // 获得数字数组中最小项
• Array.prototype.GetMin = function() {
• var oValue = 0;
• for (var i = 0; i < this.length; i++) {
• if (this[i] < oValue) {
• oValue = this[i];
• }
• }
• return oValue;
• };
• // 获取当前时间的中文形式
• Date.prototype.GetCNDate = function() {
• var oDateText = '';
• oDateText += this.getFullYear().LenWithZero(4) + new Number(24180).ChrW();
• oDateText += this.getMonth().LenWithZero(2) + new Number(26376).ChrW();
• oDateText += this.getDate().LenWithZero(2) + new Number(26085).ChrW();
• oDateText += this.getHours().LenWithZero(2) + new Number(26102).ChrW();
• oDateText += this.getMinutes().LenWithZero(2) + new Number(20998).ChrW();
• oDateText += this.getSeconds().LenWithZero(2) + new Number(31186).ChrW();
• oDateText += new Number(32).ChrW() + new Number(32).ChrW() + new Number(26143).ChrW() + new Number(26399).ChrW() + new String('26085199682010819977222352011620845').substr(this.getDay() * 5, 5).ToInt().ChrW();
• return oDateText;
• };
• //扩展Date格式化
• Date.prototype.Format = function(format) {
• var o = {
• "M+": this.getMonth() + 1, //月份
• "d+": this.getDate(), //日
• "h+": this.getHours() % 12 == 0 ? 12 : this.getHours() % 12, //小时
• "H+": this.getHours(), //小时
• "m+": this.getMinutes(), //分
• "s+": this.getSeconds(), //秒
• "q+": Math.floor((this.getMonth() + 3) / 3), //季度
• "S": this.getMilliseconds() //毫秒
• };
• var week = {
• "0": "\u65e5",
• "1": "\u4e00",
• "2": "\u4e8c",
• "3": "\u4e09",
• "4": "\u56db",
• "5": "\u4e94",
• "6": "\u516d"
• };
• if (/(y+)/.test(format)) {
• format = format.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
• }
• if (/(E+)/.test(format)) {
• format = format.replace(RegExp.$1, ((RegExp.$1.length > 1) ? (RegExp.$1.length > 2 ? "\u661f\u671f" : "\u5468") : "") + week[this.getDay() + ""]);
• }
• for (var k in o) {
• if (new RegExp("(" + k + ")").test(format)) {
• format = format.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
• }
• }
• return format;
• }
• Date.prototype.Diff = function(interval, objDate) {
• //若参数不足或 objDate 不是日期类型則回传 undefined
• if (arguments.length < 2 || objDate.constructor != Date) { return undefined; }
• switch (interval) {
• //计算秒差
• case's': return parseInt((objDate - this) / 1000);
• //计算分差
• case'n': return parseInt((objDate - this) / 60000);
• //计算時差
• case'h': return parseInt((objDate - this) / 3600000);
• //计算日差
• case'd': return parseInt((objDate - this) / 86400000);
• //计算周差
• case'w': return parseInt((objDate - this) / (86400000 * 7));
• //计算月差
• case'm': return (objDate.getMonth() + 1) + ((objDate.getFullYear() - this.getFullYear()) * 12) - (this.getMonth() + 1);
• //计算年差
• case'y': return objDate.getFullYear() - this.getFullYear();
• //输入有误
• default: return undefined;
• }
• };
• //检测是否为空
• Object.prototype.IsNullOrEmpty = function() {
• var obj = this;
• var flag = false;
• if (obj == null || obj == undefined || typeof (obj) == 'undefined' || obj == '') {
• flag = true;
• } elseif (typeof (obj) == 'string') {
• obj = obj.trim();
• if (obj == '') {//为空
• flag = true;
• } else {//不为空
• obj = obj.toUpperCase();
• if (obj == 'NULL' || obj == 'UNDEFINED' || obj == '{}') {
• flag = true;
• }
• }
• }
• else {
• flag = false;
• }
• return flag;
• };