项目开发中JS应用使用方法总结

一、获取当前网址：

function getRootPath() {
    //获取当前网址，如： http://localhost:8083/uimcardprj/share/meun.jsp
    var curWwwPath = window.document.location.href;
    //获取主机地址之后的目录，如： /uimcardprj/share/meun.jsp
    var pathName = window.document.location.pathname;
    var pos = curWwwPath.indexOf(pathName);
    //获取主机地址，如： http://localhost:8083
    var localhostPaht = curWwwPath.substring(0, pos);
    return localhostPaht;
}

二、打开新浏览器页面文件：

//打开PDF格式的出差文件报告
function pdfShow(pdfPath) {
    //获取主机地址+文件地址
    var url=getRootPath() + "/" + pdfPath；
    window.open(url, "_blank", "scrollbars=yes,resizable=1,modal=false,alwaysRaised=yes");
}

 三、获取url传递的参数：

//获取url传递的参数
function GetRequest() {
    var url = location.search; //获取url中"?"符后的字串   
    var theRequest = new Object();
    if (url.indexOf("?") != -1) {
        var str = url.substr(1);
        strs = str.split("&");
        for (var i = 0; i < strs.length; i++) {
            theRequest[strs[i].split("=")[0]] = unescape(strs[i].split("=")[1]);
        }
    }
    return theRequest;
}

四、计算两个日期相隔天数：

//计算两个日期相隔天数
function getDays(strDateStart, strDateEnd) {
    var strSeparator = "-"; //日期分隔符
    var oDate1;
    var oDate2;
    var iDays;
    oDate1 = strDateStart.split(strSeparator);
    oDate2 = strDateEnd.split(strSeparator);
    var strDateS = new Date(oDate1[0], oDate1[1] - 1, oDate1[2]);
    var strDateE = new Date(oDate2[0], oDate2[1] - 1, oDate2[2]);
    iDays = parseInt(Math.abs(strDateS - strDateE) / 1000 / 60 / 60 / 24)//把相差的毫秒数转换为天数 
    return iDays + 1;
}

五、文件上传带参数（可多个参数）,返回值改成json格式：

//文件上传带参数,返回值改成json格式
jQuery.extend({
    createUploadIframe: function (id, uri) {
        //create frame
        var frameId = 'jUploadFrame' + id;

        if (window.ActiveXObject) {
            var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
            if (typeof uri == 'boolean') {
                io.src = 'javascript:false';
            }
            else if (typeof uri == 'string') {
                io.src = uri;
            }
        }
        else {
            var io = document.createElement('iframe');
            io.id = frameId;
            io.name = frameId;
        }
        io.style.position = 'absolute';
        io.style.top = '-1000px';
        io.style.left = '-1000px';
        document.body.appendChild(io);
        return io
    },
    createUploadForm: function (id, fileElementId, data) {
        //create form
        var formId = 'jUploadForm' + id;
        var fileId = 'jUploadFile' + id;
        var form = $('<form  action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
        //var oldElement = $('#' + fileElementId);
        //var newElement = $(oldElement).clone();
        //$(oldElement).attr('id', fileId);
        //$(oldElement).before(newElement);
        //$(oldElement).appendTo(form);
        for (var i = 0; i < fileElementId.length; i++) {
            var oldElement = jQuery('#' + fileElementId[i]);
            var newElement = jQuery(oldElement).clone();
            jQuery(oldElement).attr('id', fileElementId[i]);
            jQuery(oldElement).attr('name', fileElementId[i]);
            jQuery(oldElement).before(newElement);
            jQuery(oldElement).appendTo(form);
        }
        //<span style="color:#ff0000;">增加文本参数的支持,修改本处,本处应有掌声 </span>   
        if (data) {
            for (var i in data) {
                var temp = $('<input type="hidden" name="' + i + '" />');
                temp.val(data[i]);
                temp.appendTo(form);
            }
        }
        //set attributes
        $(form).css('position', 'absolute');
        $(form).css('top', '-1200px');
        $(form).css('left', '-1200px');
        $(form).appendTo('body');
        return form;
    },
    ajaxFileUpload: function (s) {
        // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout
        s = jQuery.extend({}, jQuery.ajaxSettings, s);
        var id = new Date().getTime()
        var form = jQuery.createUploadForm(id, s.fileElementId, s.data);
        var io = jQuery.createUploadIframe(id, s.secureuri);
        var frameId = 'jUploadFrame' + id;
        var formId = 'jUploadForm' + id;
        // Watch for a new set of requests
        if (s.global && !jQuery.active++) {
            jQuery.event.trigger("ajaxStart");
        }
        var requestDone = false;
        // Create the request object
        var xml = {}
        if (s.global)
            jQuery.event.trigger("ajaxSend", [xml, s]);
        // Wait for a response to come back
        var uploadCallback = function (isTimeout) {
            var io = document.getElementById(frameId);
            try {
                if (io.contentWindow) {
                    xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : null;
                    xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document;
                } else if (io.contentDocument) {
                    xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML : null;
                    xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument : io.contentDocument.document;
                }
            } catch (e) {
                jQuery.handleError(s, xml, null, e);
            }
            if (xml || isTimeout == "timeout") {
                requestDone = true;
                var status;
                try {
                    status = isTimeout != "timeout" ? "success" : "error";
                    // Make sure that the request was successful or notmodified
                    if (status != "error") {
                        // process the data (runs the xml through httpData regardless of callback)
                        var data = jQuery.uploadHttpData(xml, s.dataType);
                        // If a local callback was specified, fire it and pass it the data
                        if (s.success)
                            s.success(data, status);
                        // Fire the global callback
                        if (s.global)
                            jQuery.event.trigger("ajaxSuccess", [xml, s]);
                    } else
                        jQuery.handleError(s, xml, status);
                } catch (e) {
                    status = "error";
                    jQuery.handleError(s, xml, status, e);
                }
                // The request was completed
                if (s.global)
                    jQuery.event.trigger("ajaxComplete", [xml, s]);
                // Handle the global AJAX counter
                if (s.global && ! --jQuery.active)
                    jQuery.event.trigger("ajaxStop");
                // Process result
                if (s.complete)
                    s.complete(xml, status);
                jQuery(io).unbind()
                setTimeout(function () {
                    try {
                        $(io).remove();
                        $(form).remove();
                    } catch (e) {
                        jQuery.handleError(s, xml, null, e);
                    }
                }, 100)
                xml = null
            }
        }
        // Timeout checker
        if (s.timeout > 0) {
            setTimeout(function () {
                // Check to see if the request is still happening
                if (!requestDone) uploadCallback("timeout");
            }, s.timeout);
        }
        try {
            // var io = $('#' + frameId);
            var form = $('#' + formId);
            $(form).attr('action', s.url);
            $(form).attr('method', 'POST');
            $(form).attr('target', frameId);
            if (form.encoding) {
                form.encoding = 'multipart/form-data';
            }
            else {
                form.enctype = 'multipart/form-data';
            }
            $(form).submit();
        } catch (e) {
            jQuery.handleError(s, xml, null, e);
        }
        if (window.attachEvent) {
            document.getElementById(frameId).attachEvent('onload', uploadCallback);
        }
        else {
            document.getElementById(frameId).addEventListener('load', uploadCallback, false);
        }
        return { abort: function () { } };
    },
    uploadHttpData: function (r, type) {
        /*源代码
        var data = !type;
        data = type == "xml" || data ? r.responseXML : r.responseText;
        // If the type is "script", eval it in global context
        if (type == "script")
            jQuery.globalEval(data);
        // Get the JavaScript object, if JSON is used.
        if (type == "json")
            eval("data = " + data);
        // evaluate scripts within html
        if (type == "html")
            jQuery("<div>").html(data).evalScripts();
        //alert($('param', data).each(function(){alert($(this).attr('value'));}));
        return data;
        */
        //返回格式给成json
        var data = r.responseText;
        var start = data.indexOf("{");
        var end = data.indexOf("}");
        var jsonStr = data.substring(start, end + 1);
        return (jsonStr instanceof Object) ? jsonStr : eval("(" + jsonStr + ")");
    }
})

六、调用，文件上传带参数（可多个参数）,返回值改成json格式：

 $.ajaxFileUpload({
            type: "POST",
            contentType: false,
            enctype: "multipart/form-data",
            url: "/UserManager/SaveUser",
            data: {userModel: JSON.stringify(userModel), user_list: JSON.stringify(user_list), travelVisitSchedule_list:},
            secureuri: false,
            fileElementId: [file1','file2'],
            dataType: 'json',
            async: false,
            success: function (data) {             
                if (data.IsSuccess) {
                    $.messager.alert('操作提示', data.Message, 'info');                  
                }
                else {
                    $.messager.alert('操作提示', data.Message, 'info');
                }
            }
        });

七、