<form name="thisform" method="get"  action="test.jsp" id="thisform" enctype="multipart/form-data">

                <input type="file" name="theFile" onchange="document.getElementById('theFilePath').value=this.value"/>

                <input type="hidden" id="theFilePath" name="theFilePath" value="">

                <br>

                <input type="submit" name="submit" value="提交">

       </form>