使用jquery.uploadify丢失session信息

1：引入需要的文件

<script src="<%=basePath%>style/js/jquery.uploadify.min.js"></script>
<link href="<%=basePath%>style/css/uploadify.css" rel="stylesheet">

2：初始化上传组件

function initUploadify() {
            $("#btnUploadify").uploadify({
                height: 30,
                swf: "<%=basePath%>style/img/uploadify.swf",
                cancelImage: "<%=basePath%>style/img/uploadify-cancel.png",
                uploader: ‘<%=basePath%>common/op/uploadFileForMedia.shtml?type=image‘,
                fileTypeDesc: ‘文档类型‘,
                fileTypeExts: ‘*.jpg;*.png;*.gif;*.jpeg;*.bmp‘,
                width: 100,
                multi: false,
                fileSizeLimit : ‘2MB‘, //设置单个文件大小限制
                method: ‘post‘,
                fileObjName: ‘uploadify‘,
                buttonText: "选择文件",
                onUploadSuccess: function (file, data, response) {
                    //上传成功
                    if (response) {
                        var dataJson = eval("(" + data + ")");
                        if(!dataJson.basepath || !dataJson.filename){
                            $(‘#errmsg‘).calert(‘alert‘,‘封面上传失败！‘);
                        }else{
                            $(".cur-edit").parents(".uploadImgWrap").find(".uploadImg").attr("src","<%=basePath%>"+ dataJson.basepath + "\/" + dataJson.filename);
                            $(".cur-edit").parents(".uploadImgWrap").find(".mediaIdInput").val(dataJson.mediaId);
                        }

                    }
                },
                onUploadError : function(file,errorCode,errorMsg,errorString,swfuploadifyQueue) {

                },
                auto: true

            });
        }

3：解决方案

<input type="hidden" id="sessionId" value="${pageContext.session.id}" />

 uploader: ‘<%=basePath%>common/op/uploadFileForMedia.shtml;jsessionid=‘ + $("#sessionId").val()+‘?type=image‘,

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