form标签multipart/form-data 文件上传表单中 传递参数无法获取的原因!

    

         文件名称： 
        
    
    

         当前目录： 

        
            
            
            
        
        当前支持格式为：jpg,png,css,js,mp4(50M以内)
    




    function formSubmit(){
        var action = "${ctxPath}/staticResource/upload";
        action += "?currentPath="+document.upload.currentPath.value;
        document.upload.action = action;
        document.upload.submit();
    }