js工具类

var Tool = Tool || {};

/**
 * 去字符串空格
 * @str String 所要检测的字符串
 * @type String 类型
 * @returns bolean
 */
Tool.trim = function(str, type){
	switch(type){
		case 'l_trim' : {
			return str.replace(/(^\s*)/g, '');
		};
		case 'r_trim' : {
			return str.replace(/(\s*$)/g, '');
		};
		default : {
			return str.replace(/(^\s*)|(\s*$)/g, '');
		};
	}
}

/**
* 判断开始字符是否是XX
*/
App.startWith = function(source, str){
	var reg = new RegExp("^" + str);
    return reg.test(source);
}

/**
 * 判断结束字符是否是XX
 */
App.endWith = function(source, str) {
    var reg = new RegExp(str + "$");
    return reg.test(source);
};

/**
 * 将form表单元素的值序列化成对象
 * @example App.serializeForm($('#formId'))
 * @requires jQuery
 * @returns object
 */
App.serializeForm = function(form) {
    var o = {};
    $.each(form.serializeArray(), function(index) {
        this['value'] = App.trim(this['value']);
        if (this['value'] != undefined && this['value'].length > 0) {// 如果表单项的值非空，才进行序列化操作
            if (o[this['name']]) {
                o[this['name']] = o[this['name']] + "," + this['value'];
            } else {
                o[this['name']] = this['value'];
            }
        }
    });
    return o;
};

/**
* 为json数据映射入表单，要求表单name对应json的每个name
*/
App.setForm = function(form, data) {
    $.each(form.serializeArray(), function(index) {
        var name = this['name'];
        var input = $(':input[name="'+ name +'"]');
        if(input)
            input.val(data[name]);
    });
};

/**
 * 增加formatString功能
 * @example App.formatString('字符串{0}字符串{1}字符串','第一个变量','第二个变量');
 * @returns 格式化后的字符串
 */
App.formatString = function(str) {
    for ( var i = 0; i < arguments.length - 1; i++) {
        str = str.replace("{" + i + "}", arguments[i + 1]);
    }
    return str;
};

/**
 * 接收一个以逗号分割的字符串，返回List，list里每一项都是一个字符串
 * @returns list
 */
App.stringToList = function(value) {
    if (value != undefined && value != '') {
        var values = [];
        var t = value.split(',');
        for ( var i = 0; i < t.length; i++) {
                values.push('' + t[i]);
        }
        return values;
    } else {
		return [];
    }
};

/**
 * JSON对象转换成String
 * @param o
 * @returns
 */
App.jsonToString = function(o) {
    var r = [];
    if (typeof o == "string")
        return "\"" + o.replace(/([\'\"\\])/g, "\\$1").replace(/(\n)/g, "\\n").replace(/(\r)/g, "\\r").replace(/(\t)/g, "\\t") + "\"";
    if (typeof o == "object") {
        if (!o.sort) {
            for ( var i in o)
                r.push(i + ":" + App.jsonToString(o[i]));
            if (!!document.all && !/^\n?function\s*toString\(\)\s*\{\n?\s*\[native code\]\n?\s*\}\n?\s*$/.test(o.toString)) {
                r.push("toString:" + o.toString.toString());
            }
            r = "{" + r.join() + "}";
        } else {
            for ( var i = 0; i < o.length; i++)
                r.push(App.jsonToString(o[i]));
            r = "[" + r.join() + "]";
        }
        return r;
    }
    return o.toString();
};

/**
 * cookie
 * @param key
 * @param value
 * @param options
 * @returns
 */
App.cookie = function(key, value, options) {
    if (arguments.length > 1 && (value === null || typeof value !== "object")) {
        options = $.extend({}, options);
        if (value === null) {
            options.expires = -1;
        }
        if (typeof options.expires === 'number') {
            var days = options.expires, t = options.expires = new Date();
            t.setDate(t.getDate() + days);
        }
        return (document.cookie = [ encodeURIComponent(key), '=', options.raw ? String(value) : encodeURIComponent(String(value)), options.expires ? '; expires=' + options.expires.toUTCString() : '', options.path ? '; path=' + options.path : '', options.domain ? '; domain=' + options.domain : '', options.secure ? '; secure' : '' ].join(''));
    }
    options = value || {};
    var result, decode = options.raw ? function(s) {
        return s;
    } : decodeURIComponent;
    return (result = new RegExp('(?:^|; )' + encodeURIComponent(key) + '=([^;]*)').exec(document.cookie)) ? decode(result[1]) : null;
};

/**
 * 判断IE浏览器类型，向后兼容。如果是IE9，返回9，如果是IE8，返回8；非IE，返回false
 * @param o
 * @returns
 */
App.IE = (function() {
    var v = 3, div = document.createElement('div'), all = div.getElementsByTagName('i'); 
    while (div.innerHTML = '<!--[if gt IE ' + (++v) + ']><i></i><![endif]-->',all[0]); 
    return v > 4 ? v : false ; 
}());

/**
 * 解析URL攜帶的?之後的參數，轉換為對象，返回之
 * @param location
 * @returns
 */
App.getURLparams = function(){
    var o = {};
    if(location.search){
        var search_params = location.search.substr(1).split('&');
        if(search_params){
            $.each(search_params, function(i){
                o[this.split('=')[0]] = decodeURIComponent(this.split('=')[1]);
            });
        }
    }
    return o;
};

/**
 * 解析string 成为object
 * @param str, index
 * @returns
 */
App.extractStringtoObject = function(str, index, sym){
    var o = {};
    if(index != null){
        var i = str.indexOf('=', index);
        o[str.substr(0, i)] = str.substr(i + 1);
    }else{
        if(sym == null)
            sym = '$';
        var search_params = str.split(sym);
        if(search_params){
            $.each(search_params, function(i){
                o[this.split('=')[0]] = this.split('=')[1];
            });
        }
    }
    return o;
};

/**
 * 获取URL的contextPath
 * @param
 * @returns
 */
App.contextPath = function(){
    var origin = location.origin;
    var pathname = location.pathname;
    var projectname = pathname.substr(0, pathname.indexOf('/', 1));
    return origin + projectname;
};

/** 
 生成指定位数的随机整数 
 **/  
App.getRandomNum = function(count){  
    var arr = new Array;  
    var reNum = "";  
    for(var i=0;i<count;i++){  
        arr[i] = parseInt(Math.random()*10);  
        reNum += String(arr[i]);  
    }  
    return reNum;  
}  
App.random = function(min,max){  
    return Math.floor(min+Math.random()*(max-min));  
}

/** 
 * 给URL追加参数 
 * @param {} url 
 * @param {} parameter 参数名 
 * @param {} value  参数值 
 */  
App.urlAddParmert = function(url,parameter,value){  
    var buf = new StringBuffer();  
    if(!isEmpty(url)){  
        buf.append(url);  
        if(url.indexOf("?") > -1){  //已经有参数  
            buf.append("&");  
        }else{  
            buf.append("?");  
        }  
        buf.append(parameter);  
        buf.append("=");  
        buf.append(value);  
    }  
    return buf.toString();  
}

/** 
 * 得到文件的扩展名 
 * @param {} filename 
 */  
App.getFileExt = function(filename){  
    var d=/\.[^\.]+$/.exec(filename);  
    var ext = new String(d);  
    var s = ext.toLowerCase();  
    return s;  
}