JSP 页面代码：            <form action="#" name="uploadForm" method="post" enctype="multipart/form-data">               <input type="file" name="upload" id="upload" onchange="loadImageFile(event)">                    <img id="image" src="" >                    <input type="submit" value="上传">            </form>      JS 代码：            function loadImageFile(event)            {                    var image = document.getElementById('image');                    image.src = URL.createObjectURL(event.target.files[0]);             };