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;
};