js一些通用方法的封装

//封装StringBuilder

function StringBuilder() { this._string_ = new Array(); }

StringBuilder.prototype.Append = function (str) { this._string_.push(str); }

StringBuilder.prototype.toString = function () { return this._string_.join(""); }

//trim去掉字符串两边的指定字符,默去空格

String.prototype.Trim = function (str) { if (!str) { str = '\\s'; } else { if (str == '\\') { str = '\\\\'; } else if (str == ',' || str == '|' || str == ';') { str = '\\' + str; } else { str = '\\s'; } } eval('var reg=/(^' + str + '+)|(' + str + '+$)/g;'); return this.replace(reg, ''); };

String.prototype.trim = function (str) { return this.Trim(str); };

//判断一个字符串是否为NULL或者空字符串

String.prototype.isNull = function () { return this == null || this.trim().length == 0; }

String.prototype.equals = function (str) { return this == str; }

//字符串截取后面加入...

String.prototype.interceptString = function (len) {

if (this.length > len) {

return this.substring(0, length - 1) + "...";

}

else {

return this;

}

}

//获得一个字符串的字节数

String.prototype.countLength = function () { var strLength = 0; for (var i = 0; i < this.length; i++) { if (this.charAt(i) > '~') strLength += 2; else strLength += 1; } return strLength; }

//根据指定的字节数截取字符串

String.prototype.cutString = function (cutLength) { if (!cutLength) { cutLength = this.countLength(); } var strLength = 0; var cutStr = ""; if (cutLength > this.countLength()) { cutStr = this; } else { for (var i = 0; i < this.length; i++) { if (this.charAt(i) > '~') { strLength += 2; } else { strLength += 1; } if (strLength >= cutLength) { cutStr = this.substring(0, i + 1); break; } } } return cutStr; };

//关于链接的操作命名空间

var Link = {};

//把一个字符串变成链接

Link.Filter = function (str) {

var urlReg = /http(s)?:\/\/([\w-]+\.)+[\w-]+(\/[\w- .\/?%&=])?[^ <>\[\]*(){}\u4E00-\u9FA5]+/gi;   //lio 2012-4-25 eidt   //         /^[\u4e00-\u9fa5\w]+$/;\u4E00-\u9FA5

return str.replace(urlReg, function (m) { return '<a target="_blank" href="' + m + '">' + m + '</a>'; });

}

//验证一个字符串时候是email

RegExp.isEmail = function (str) {

var emailReg = /^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)*\.[\w-]+$/i;

return emailReg.test(str);

}

//验证一个字符串是否是URL

RegExp.isUrl = function (str) {

var patrn = /^http(s)?:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\:+!]*([^<>])*$/;

return patrn.exec(str);

}

//验证一个字符串是否是电话或传真

RegExp.isTel = function (str) {

var pattern = /^[+]{0,1}(\d){1,3}[ ]?([-]?((\d)|[ ]){1,12})+$/;

return pattern.exec(str);

}

//验证一个字符串是否是手机号码

RegExp.isMobile = function (str) {

var patrn = /^((13[0-9])|(15[0-35-9])|(18[0,2,3,5-9]))\d{8}$/;

return patrn.exec(str);

}

//验证一个字符串是否是汉字

RegExp.isZHCN = function (str) {

var p = /^[\u4e00-\u9fa5\w]+$/;

return p.exec(str);

}

//验证一个字符串是否是数字

RegExp.isNum = function (str) {

var p = /^\d+$/;

return p.exec(str);

}

//验证一个字符串是否是纯英文

RegExp.isEnglish = function (str) {

var p = /^[a-zA-Z., ]+$/;

return p.exec(str);

}

// 判断是否为对象类型

RegExp.isObject = function (obj) {

return (typeof obj == 'object') && obj.constructor == Object;

}

//验证字符串是否不包含特殊字符 返回bool

RegExp.isUnSymbols = function (str) {

var p = /^[\u4e00-\u9fa5\w \.,()，ê?。¡ê（ꡧ）ê?]+$/;

return p.exec(str);

}

//将一个字符串用给定的字符变成数组，

String.prototype.toArray = function (str) {

if (this.indexOf(str) != -1) {

return this.split(str);

}

else {

if (this != '') {

return [this.toString()];

}

else {

return [];

}

}

};

//根据数据取得再数组中的索引

Array.prototype.getIndex = function (obj) {

for (var i = 0; i < this.length; i++) {

if (obj == this[i] || obj.equals(this[i])) {

return i;

}

}

return -1;

}

//移除数组中的某元素

Array.prototype.remove = function (obj) {

for (var i = 0; i < this.length; i++) {

if (obj.equals(this[i])) {

this.splice(i, 1);

break;

}

}

return this;

};

//判断元素是否在数组中

Array.prototype.contains = function (obj) {

for (var i = 0; i < this.length; i++) {

if (obj == this[i] || obj.equals(this[i])) {

return true;

}

}

return false;

};