1.jsp页面代码
- <form id="userPhoto" name="userPhoto" method="post" action="../uploadUserPhoto" enctype="multipart/form-data">
- <input type="hidden" id="max_PhotoSize" name="maxPhotoSize" value="${maxPhotoSize}"/>
- <input type="hidden" id="photoType" name="photoType" value=""/>
- <input type="file" id="filePhoto" value=""
- style="font-size:400px;opacity:0;filter:alpha(opacity:0);-moz-opacity:0;position:absolute;top:0px;left:0px;width:400px;height:400px;z-index:100;overflow：hidden;cursor:pointer;"
- name="userPhoto"/>
- <img style="top:0px;left:0px;z-index:99" id="imgUserPhoto" src="" width="100" height="140">
- <table cellpadding="0" cellspacing="0" width="100%" height="100%" border="0" align="center">
- <tr>
- <td width="100%" align="center" valign="middle">
- <s:hidden id="userId" name="user.userId" />
- </td>
- </tr>
- </table>
- </form>
2.js代码
- function uploadImage() {
- var fileSize = 1024 * 5000;
- var maxFileSize= $("#max_PhotoSize")[0].value ;
- var location = $("#filePhoto")[0].value;
- var point = location.lastIndexOf(".");
- var type = location.substr(point);
- $("#photoType").val(type);
- if (type == ".jpg" || type == ".gif" || type == ".JPG" || type == ".GIF" || type == ".bmp" || type == ".BMP"
- || type == ".jpeg" || type == ".JPEG" || type == ".PNG" || type == ".png" ) {
- if ($.browser.msie) {//IE
- var img = document.createElement("img");
- img.src = $("#filePhoto")[0].value;
- fileSize = img.fileSize;
- }
- if ($.browser.mozilla || (navigator.userAgent.toLowerCase().match(/chrome/) !=null)) {//火狐或者chrome
- fileSize = $("#filePhoto")[0].files[0].size;
- }
- if (fileSize > maxFileSize*1024) {
- alert("图片尺寸请不要大于"+maxFileSize+"KB");
- return false;
- } else {
- $("#userPhoto")[0].submit();
- return true;
- }
- } else {
- alert("只能上传jpg,gif,bmp,jpeg,png格式的图片");
- return false;
- }
- return true;
- }
3.补充：
以上关于IE的验证，适合于IE6以前的版本，对于IE7以上的版本前台不好判断图片的大小，最好还是通过后台判断：
(1)先将Form提交
(2)在后台判断提交图片文件大小，如果大于最大限制，则不做任何处理，返回提示语，如果在最大限制内，则再进行保存等处理
