我有一个包含四个字段的表单,文件,名称,类型(只是一个字符串)和taskInstanceId。
<form>
<table id="documentDetailsTable">
<tr>
<td>Document Type: </td>
<td><select id="documentType" name="type"> </select></td>
</tr>
<tr>
<td>
Document Name:
</td>
<td>
<input type="text" id="documentName" name="name"/>
</td>
</tr>
<tr id="newFile">
<td>
Choose a file:
</td>
<td>
<input type="file" name="file" />
</td>
</table>
<input type="text" style="display: none;" name="taskInstanceId" id="taskInstanceId">
<input id="uploadButton" value="Upload" type="submit"/>
<input class="closeButton" id="closeNew" value="Close" type="button"/>
</form>
如果我提交此表单,它将连接到我的FileUploadController,文件将上传。
@RequestMapping(value = "/formTask.do", method = RequestMethod.POST)
public ModelAndView handleFormTaskUpload(@RequestParam("name") String name,
@RequestParam("type") String type,
@RequestParam("file") MultipartFile file,
@RequestParam("taskInstanceId") int taskInstanceId)...//rest of the code
现在我想使用jquery / json提交此表单,以便我可以返回一个表示上传成功的字符串,然后在页面上显示一个对话框,表明这一点。 (我不想返回一个新的ModelAndView。)
因此,使用相同的html表单,我创建了一个新的Controller函数......
@RequestMapping(value = "/formTask2.json", method = RequestMethod.POST)
public String handleFormTaskUpload2(UploadTaskDocument myNewUpload)).../rest of the code
现在我想使用jQuery提交上面的表单。我的尝试就在这里。
每次更改文件时都会调用此函数。
function prepareUpload(event)
{
files = event.target.files;
}
提交表单时会调用此文件。
function uploadFiles(event)
{
event.stopPropagation(); // Stop stuff happening
event.preventDefault(); // Totally stop stuff happening
var data;
data = {
documentName: $("#documentName").val(),
documentType: $("#documentType").val(),
taskInstanceId: selectedTaskInstanceId,
uploadedfiles: files
};
var json = JSON.stringify(data);
$.ajax({
url: '/SafeSiteLive/formTask2.json',
type: 'POST',
data: json,
cache: false,
dataType: 'json',
processData: false, // Don't process the files
contentType: false, // Set content type to false as jQuery will tell the server its a query string request
success: function (data, textStatus, jqXHR)
{
if (typeof data.error === 'undefined')
{
// Success so call function to process the form
//submitForm(event, data);
}
else
{
// Handle errors here
console.log('ERRORS: ' + data.error);
}
},
error: function (jqXHR, textStatus, errorThrown)
{
// Handle errors here
console.log('ERRORS: ' + textStatus);
// STOP LOADING SPINNER
}
});
}
Json数据在发布之前看起来像这样......
但是一旦它到达服务器,一切都是空的......
答案 0 :(得分:1)
好的,这似乎与您的解决方案有点不同,但我会通过以下方式进行。
据我所知,您希望使用ajax将数据上传到控制器并避免回发,然后返回一个字符串而不是字符串。我会这样做。
你的表格是:
<form> //Remove the method type as well as where the post should happen to ensure that you do not have to prevent default behavior
<table id="documentDetailsTable">
<tr>
<td>Document Type: </td>
<td><select id="documentType" name="type"> </select></td>
</tr>
<tr>
<td>
Document Name:
</td>
<td>
<input type="text" id="documentName" name="name"/>
</td>
</tr>
<tr id="newFile">
<td>
Choose a file:
</td>
<td>
<input type="file" name="file" />
</td>
</table>
<input type="text" style="display: none;" name="taskInstanceId" id="taskInstanceId">
<input id="uploadButton" value="Upload" onclick('uploadFiles()')/> //Add //the event to your submit button and remove the submit from itself
<input class="closeButton" id="closeNew" value="Close" type="button"/>
</form>
你的JQuery:
//Stays the same I would suggest using a object type and then stringify it as follows
function uploadFiles(event)
{
event.stopPropagation(); // Stop stuff happening
event.preventDefault(); // Totally stop stuff happening
// START A LOADING SPINNER HERE
// Create a formdata object and add the files
//var data = new FormData();
//.each(files, function (key, value)
//{
// data.append(key, value);
//});
//data.append('documentName', $("#documentName").val());
//data.append('documentType', $("#documentType").val());
//data.append('taskInstanceId', $("#taskInstanceId").val());
// Create a objectobject and add the files
var data;
data = {
documentName:$("#documentName").val(),
documentType:$("#documentType").val(),
taskInstanceId:$("#taskInstanceId").val(),
uploadedfiles: files
}
var json = JSON.stringify(data);
$.ajax({
url: '/SafeSiteLive/formTask2.do',
type: 'POST',
data: json,
cache: false,
dataType: 'json',
processData: false, // Don't process the files
contentType: false, // Set content type to false as jQuery will tell the server its a query string request
success: function (data, textStatus, jqXHR)
{
if (typeof data.error === 'undefined')
{
// Success so call function to process the form
submitForm(event, data);
}
else
{
// Handle errors here
console.log('ERRORS: ' + data.error);
}
},
error: function (jqXHR, textStatus, errorThrown)
{
// Handle errors here
console.log('ERRORS: ' + textStatus);
// STOP LOADING SPINNER
}
});
}
在您的控制器中:
当您使用MVC时,请使用模型,因为它是捕获参数的正确方式。
public String handleFormTaskUpload2(UploadedFile mynewUpload )
{
//rest of code here
}
您的模型将会看到这个。
public class UploadedFile
{
public string documentName{get;set}
public string documentType{get;set}
public string taskInstanceId{get;set}
prop List<byte[]> files {get;set}
}
希望这有帮助,如果您仍然不理解,请告诉我