准备
需要ajaxFileupload.js文件，在文章最后会贴出原码，因为这是原ajaxfileupload的改装版（网上找到的）
实现
虽然是用一个Ajax实现提交，然而form表单还是要分开写
java
<form id="addForm" >
······
</form>
<form id="ImgForm" enctype="multipart/form-data" >
······
</form>
js文件要注意附加表单序列化用的是serializeAarray()
java
$.ajaxFileUpload({
url:"editItem.do",secureuri:false,fileElementId:$("input[name='file_upload']").attr("id"),dataType:'json',data:$("#addForm").serializeArray(),success:function(data){
if(data.success){
$("#Form_add").dialog("close");
$("#Form_add").css("display","none");
$('#list_data').datagrid('reload');
}
},error:function(data){
alert("error"+data.msg);
}
});
后台对于表单，Spring MVC该怎么接收怎么接收，比如下面的 item自定义变量
java
@RequestMapping(value="/editItem.do")
public void editItem(Item item,HttpServletResponse response,HttpServletRequest request) throws FileNotFoundException,IOException{
·······
CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
if (multipartResolver.isMultipart(request)) {
MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest) request;
Iterator<String> iter = multiRequest.getFileNames();
while (iter.hasNext()) {
MultipartFile file = multiRequest.getFile(iter.next());
if(!file.isEmpty()){
savePicture(file,request);//保存图片
}
}
}
}
java
//文件保存到服务器上
protected String savePicture(MultipartFile file,HttpServletRequest request)
throws IOException,FileNotFoundException {
// System.out.println("图片上传成功");
String ImagePath = request.getSession().getServletContext().getRealPath("/static/img");
File targetfile = new File(ImagePath,file.getOriginalFilename());
Date date = new Date(System.currentTimeMillis());
if(targetfile.exists()){
targetfile = new File(ImagePath,file.getOriginalFilename() + date.toString());
}
InputStream ins = file.getInputStream();
FileOutputStream fos = new FileOutputStream(targetfile);
byte b[] = new byte[1024];
int temp = 0;
while((temp = ins.read(b)) != -1){
fos.write(b,0,temp);
}
fos.close();
ins.close();
return targetfile.getName();
}
附件
下面给出ajaxfileupload.js的文件
js
jQuery.extend({
createUploadIframe: function (id,uri) {
//create frame
var frameId = 'jUploadFrame' + id;
var iframeHtml = '<iframe id="' + frameId + '" name="' + frameId + '" style="position:absolute; top:-9999px; left:-9999px"';
if (window.ActiveXObject) {
if (typeof uri == 'boolean') {
iframeHtml += ' src="' + 'javascript:false' + '"';
}
else if (typeof uri == 'string') {
iframeHtml += ' src="' + uri + '"';
}
}
iframeHtml += ' />';
jQuery(iframeHtml).appendTo(document.body);
return jQuery('#' + frameId).get(0);
},createUploadForm: function (id,fileElementId,data) {
//create form
var formId = 'jUploadForm' + id;
var fileId = 'jUploadFile' + id;
var form = jQuery('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
if (data) {
for (var i in data) {
if (data[i].name != null && data[i].value != null) {
jQuery('<input type="hidden" name="' + data[i].name + '" value="' + data[i].value + '" />').appendTo(form);
} else {
jQuery('<input type="hidden" name="' + i + '" value="' + data[i] + '" />').appendTo(form);
}
}
}
var oldElement = jQuery('#' + fileElementId);
var newElement = jQuery(oldElement).clone();
jQuery(oldElement).attr('id',fileId);
jQuery(oldElement).before(newElement);
jQuery(oldElement).appendTo(form);
//set attributes
jQuery(form).css('position','absolute');
jQuery(form).css('top','-1200px');
jQuery(form).css('left','-1200px');
jQuery(form).appendTo('body');
return form;
},ajaxFileUpload: function (s) {
// TODO introduce global settings,allowing the client to modify them for all requests,not only timeout
s = jQuery.extend({},jQuery.ajaxSettings,s);
var id = new Date().getTime()
var form = jQuery.createUploadForm(id,s.fileElementId,(typeof (s.data) == 'undefined' ? false : s.data));
var io = jQuery.createUploadIframe(id,s.secureuri);
var frameId = 'jUploadFrame' + id;
var formId = 'jUploadForm' + id;
// Watch for a new set of requests
if (s.global && !jQuery.active++) {
jQuery.event.trigger("ajaxStart");
}
var requestDone = false;
// Create the request object
var xml = {}
if (s.global)
jQuery.event.trigger("ajaxSend",[xml,s]);
// Wait for a response to come back
var uploadCallback = function (isTimeout) {
var io = document.getElementById(frameId);
try {
if (io.contentWindow) {
xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : null;
xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document;
} else if (io.contentDocument) {
xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML : null;
xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument : io.contentDocument.document;
}
} catch (e) {
jQuery.handleError(s,xml,null,e);
}
if (xml || isTimeout == "timeout") {
requestDone = true;
var status;
try {
status = isTimeout != "timeout" ? "success" : "error";
// Make sure that the request was successful or notmodified
if (status != "error") {
// process the data (runs the xml through httpData regardless of callback)
var data = jQuery.uploadHttpData(xml,s.dataType);
// If a local callback was specified,fire it and pass it the data
if (s.success)
s.success(data,status);
// Fire the global callback
if (s.global)
jQuery.event.trigger("ajaxSuccess",s]);
} else
jQuery.handleError(s,status);
} catch (e) {
status = "error";
jQuery.handleError(s,status,e);
}
// The request was completed
if (s.global)
jQuery.event.trigger("ajaxComplete",s]);
// Handle the global AJAX counter
if (s.global && ! --jQuery.active)
jQuery.event.trigger("ajaxStop");
// Process result
if (s.complete)
s.complete(xml,status);
jQuery(io).unbind()
setTimeout(function () {
try {
jQuery(io).remove();
jQuery(form).remove();
} catch (e) {
jQuery.handleError(s,e);
}
},100)
xml = null
}
}
// Timeout checker
if (s.timeout > 0) {
setTimeout(function () {
// Check to see if the request is still happening
if (!requestDone) uploadCallback("timeout");
},s.timeout);
}
try {
var form = jQuery('#' + formId);
jQuery(form).attr('action',s.url);
jQuery(form).attr('method','POST');
jQuery(form).attr('target',frameId);
if (form.encoding) {
jQuery(form).attr('encoding','multipart/form-data');
}
else {
jQuery(form).attr('enctype','multipart/form-data');
}
jQuery(form).submit();
} catch (e) {
jQuery.handleError(s,e);
}
jQuery('#' + frameId).load(uploadCallback);
return { abort: function () { } };
},uploadHttpData: function (r,type) {
var data = !type;
if (!type)
data = r.responseText;
if (type == "xml")
data = r.responseXML;
//data = type == "xml" || data ? r.responseXML : r.responseText;
// If the type is "script",eval it in global context
if (type == "script")
jQuery.globalEval(data);
// Get the JavaScript object,if JSON is used.
if (type == "json") {
////////////Fix the issue that it always throws the error "unexpected token '<'"/////////////// data = r.responseText; var start = data.indexOf(">");
if (start != -1) {
var end = data.indexOf("<",start + 1);
if (end != -1) {
data = data.substring(start + 1,end);
}
}
///////////////////////////////////////////////////////////////////////////////////////////////
eval("data = " + data);
}
// evaluate scripts within html
if (type == "html")
jQuery("<div>").html(data).evalScripts();
return data;
},handleError: function (s,xhr,e) {
// If a local callback was specified,fire it
if (s.error) {
s.error.call(s.context || s,e);
}
// Fire the global callback
if (s.global) {
(s.context ? jQuery(s.context) : jQuery.event).trigger("ajaxError",[xhr,s,e]);
}
}
})
