Ext 文件上传 fileuploadfield 帮帮忙 急呀,该如何解决

Ext 文件上传 fileuploadfield 帮帮忙 急呀
帮帮忙 给我写出后台的代码吧 给提示也行 我不知道后台怎么接收
我要保存 文件名 和文件路径 当然文件也是肯定要保存的。帮帮忙
前台代码我已经写好了

JScript code

Ext.onReady(function(){    Ext.QuickTips.init();    var msg = function(title, msg){        Ext.Msg.show({            title: title,            msg: msg,            minWidth: 200,            modal: true,            icon: Ext.Msg.INFO,            buttons: Ext.Msg.OK        });    };    var fp = new Ext.FormPanel({        renderTo: 'fi-form',        fileUpload: true,        width: 500,        frame: true,        title: 'File Upload Form',        autoHeight: true,        bodyStyle: 'padding: 10px 10px 0 10px;',        labelWidth: 50,        defaults: {            anchor: '95%',            msgTarget: 'side'        },        items: [{            xtype: 'textfield',            fieldLabel: 'Name',            name:"common.name",            id:"fileName"        },{            xtype: 'fileuploadfield',            id: 'formFile',            emptyText: 'Select an image',            fieldLabel: 'Photo',            name: 'common.fileStr',            fileUpload : true,            buttonText: '',            buttonCfg: {                iconCls: 'upload-icon'            }        }],        buttons: [{            text: 'Save',            handler: function(){                var v = Ext.getCmp('formFile').getValue();                alert(v);                if(fp.getForm().isValid()){                    fp.getForm().submit({                        url: "/common/common_fileLoad.action",                        method:'POST',                        waitMsg: 'Uploading your photo...',                        success: function(fp, o){                            msg('Success', 'Processed file "'+o.result.file+'" on the server');                        }                    });                }            }        },{            text: 'Reset',            handler: function(){                fp.getForm().getEl().dom.reset();            }        }]    });});