(1)jsp代碼:
<form id="form" name="form" enctype="multipart/form-data" method="post" target="hidden_frame">
<table style="border:0;width:100%;text-align:middle;">
<tr style="border:0;height:20px;width:100%;">
<td style="border:0;width:75px;height:20px;line-height:20px;">控件標識</td>
<td>
<input id="viewkey" name="viewkey" style="width:200px;" type="text" maxlength="300" placeholder="控件標識不能超過30個字。" class="easyui-validatebox" οnkeyup="check()" required="true" missingMessage="參數名稱不可爲空."/>
</td>
</tr>
<tr>
<td>更新類型</td>
<td><input id="type" name="type" class="easyui-combobox" valueField="id" textField="text" panelHeight="auto"/></td>
</tr>
<tr>
<td>備註</td>
<td colspan=3>
<textarea id="remark" name="remark" οnkeyup="check()" placeholder="備註不能超過300個字。" style="width:200px;height:80px;" ></textarea>
</td>
</tr>
<tr>
<td>資源文件:</td>
<td >
<input type="file" id="file" name="file" style="height:25px; width:200px;" οnchange="fileChange(this);">
<input type="hidden" name="projectid" id="projectid" >
<input type="hidden" name="downimageconfigid" id="downimageconfigid" >
<input type="hidden" name="iskeychange" id="iskeychange" >
<input type="hidden" name="isnopic" id="isnopic" >
<iframe name="hidden_frame" id="hidden_frame" style="display:none"></iframe>
</td>
</tr>
<tr>
<td></td>
<td><div style="color: red; margin-top: 10px;">圖片大小必須小於500K。</div></td>
</tr>
</table>
</form>
說明:form中的target指向iframe中的name。這點要注意。
(2)js代碼:
//添加對話框
function initDialog(){
$('#imgconf-dialog').dialog({
modal:true,
closable:false,
top: 20,
buttons:[{
id:'ut_add',
text:'確定',
iconCls:'icon-ok',
handler:function(){
//表單註冊事件
$('#form').form({
success:function(data){//提交成功後的回調函數
if(data === '00'){
jqueryAlert('操作成功');
}
if(data === '03'){
$.messager.alert(global.title,'主鍵爲空!','warning');
$('#ut_add').linkbutton('enable');
return;
}
if(data === '02'){
$.messager.alert(global.title,'已存在的控件標識!','warning');
$('#ut_add').linkbutton('enable');
return;
}
if(data === '01'){
$.messager.alert(global.title,'操作失敗','warning');
$('#ut_add').linkbutton('enable');
return;
}
$('#imgconf-dialog').dialog('close');
//重新加載列表
getDataGridData();;
}
});
$('#ut_add').linkbutton('disable');
//【添加】
if(global.operatype == 'add'){
if($('#viewkey').val() == null || $('#viewkey').val() == ''){
$.messager.alert(global.title,'您尚未輸入控件標識!','warning');
$('#ut_add').linkbutton('enable');
return;
}
if($('#file').val() == ''){
$.messager.alert(global.title,'您尚未上傳圖片!!','warning');
$('#ut_add').linkbutton('enable');
return;
}
//表單上傳操作
$('#projectid').val(global.projectid);
$('#form').attr("action", global.web_path + "/grid/imgconf/addimgconf.do");
$("#form").submit();
$('#ut_add').linkbutton('disable');
} else {//【編輯】
//控件標識是否改變
var iskeychange;
if(selected.viewkey == $('#viewkey').val()){//控件標識沒有改變
iskeychange = 'no';
}else{
iskeychange = 'yes';
}
var isnopic;
if($('#file').val() == ''){//是否有上傳圖片
snopic = 'yes';
}else{
isnopic = 'no';
}
//表單上傳操作
$('#projectid').val(global.projectid);
$('#downimageconfigid').val(selected.downimageconfigid);
$('#iskeychange').val(iskeychange);
$('#isnopic').val(isnopic);
$('#form').attr("action",global.web_path + "/grid/imgconf/modimgconf.do");
$("#form").submit(); ;
$('#ut_add').linkbutton('disable');
}
}
},{
id:'ut_close',
text:'退出',
handler:function(){
$('#ut_add').linkbutton('enable');
$('#imgconf-dialog').dialog('close');
$('#uploadify').uploadifyClearQueue();
}
}]
});
}
//重置
function reset(){
$('#ut_add').linkbutton('enable');
var target = $('#file');
if(global.operatype == 'mod'){
$('#imgconf-dialog').dialog('setTitle','修改');
$('#viewkey').val(selected.viewkey);
$('#type').combobox('setValue', selected.type);
$('#remark').val(selected.remark);
$('#imgconf-dialog').dialog('open');
//文件上傳清空
deleteFile('file');
}else {
$('#imgconf-dialog').dialog('setTitle','添加');
$('#viewkey').val('');
$('#remark').val('');
//文件上傳清空
deleteFile('file');
}
}
/**
* 文本區域限制長度
*/
function check(){
var content = $('#remark').val();
len = content.length;
var maxlen = 300;
if(len > maxlen){
alert("字數太長,已被截斷爲300字!");
$('#remark').val(content.substr(0,maxlen));
}
}
// input type='file'置位操作
function deleteFile(file){
var ie = (navigator.appVersion.indexOf("MSIE")!=-1);//IE
var ff = (navigator.userAgent.indexOf("Firefox")!=-1);//Firefox
if(ie){
refreshUploader($("input[name="+file+"]")[0]);
}
else{
$("input[name="+file+"]").attr("value","");
}
}
function refreshUploader(file){
var file2= file.cloneNode(false);
file2.οnchange= file.onchange;
file.parentNode.replaceChild(file2,file);
}
//檢測文件大小和類型
function fileChange(target){
//檢測上傳文件的類型
if(!(/(?:jpg|gif|png|jpeg)$/i.test(target.value))) {
alert("只允許上傳jpg|gif|png|jpeg格式的圖片");
if(window.ActiveXObject) {//for IE
target.select();//select the file ,and clear selection
document.selection.clear();
} else if(window.opera) {//for opera
target.type="text";target.type="file";
} else target.value="";//for FF,Chrome,Safari
return;
} else {
return; //alert("ok");//or you can do nothing here.
}
//檢測上傳文件的大小
var isIE = /msie/i.test(navigator.userAgent) && !window.opera;
var fileSize = 0;
if (isIE && !target.files){
var filePath = target.value;
var fileSystem = new ActiveXObject("Scripting.FileSystemObject");
var file = fileSystem.GetFile (filePath);
fileSize = file.Size;
} else {
fileSize = target.files[0].size;
}
var size = fileSize / 1024;
if(size>(500)){
alert("文件大小不能超過500KB");
if(window.ActiveXObject) {//for IE
target.select();//select the file ,and clear selection
document.selection.clear();
} else if(window.opera) {//for opera
target.type="text";target.type="file";
} else {
target.value="";//for FF,Chrome,Safari
}
return;
}else{
return;
}
}
(3)後臺java代碼:
/**
* 添加下載圖片配置
* @throws IOException
*/
@RequestMapping(value = "/grid/imgconf/addimgconf",method = {RequestMethod.POST, RequestMethod.GET},produces = {"text/html;charset=UTF-8"})
@ResponseBody
public String addImgConf(HttpServletRequest
request, HttpServletResponse response, BindException errors) throws IOException{
String m = "00";
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
Map<String, MultipartFile> fileMap = multipartRequest.getFileMap();
response.setHeader("Access-Control-Allow-Origin", "*");
String projectid = Function.dealNull(multipartRequest.getParameter("projectid"));
String viewKey = Function.dealNull(multipartRequest.getParameter("viewkey"));
String type = Function.dealNull(multipartRequest.getParameter("type"));
String remark = Function.dealNull(multipartRequest.getParameter("remark"));
try {
//唯一性判斷
int size = imgConfService.getImgConfsCount(Constants.DEF_STRING_NULL, projectid, viewKey, Constants.STATUS_ON);
if(size > 0){
m = "02";
logger.info("已存在的控件標識!");
return "<textarea>" + m + "</textarea>";
}
//上傳圖片
Map<String, String> picInfo = imgConfService.uploadImage(fileMap);
imgConfService.addImgConf(UUID.randomUUID().toString(), projectid, viewKey, type, remark, picInfo.get("URL"), Constants.STATUS_ON);
m = "00";
logger.info("添加下載圖片配置成功!");
} catch (Exception e) {
m = "01";
logger.error("添加下載圖片配置失敗" ,e);
}
//加<textarea>以解決IE下submit後沒有執行回調success函數,這個是jquery easyui form的bug
return "<textarea>" + m + "</textarea>";
}
說明:"<textarea>" + m + "</textarea>";和produces = {"text/html;charset=UTF-8"}解決IE下不能執行回調函數success的問題