<form id="uploadForm" enctype="multipart/form-data">
<input id="file" type="file" name="file"/>
<button id="upload" type="button">upload</button>
</form>

$.ajax({
url: '/upload',
type: 'POST',
cache: false,
data: new FormData($('#uploadForm')[0]),
processData: false,
contentType: false
}).done(function(res) {
}).fail(function(res) {});

<div id="uploadForm">
<input id="file" type="file"/>
<button id="upload" type="button">upload</button>
</div>

var formData = new FormData();
formData.append('file', $('#file')[0].files[0]);
$.ajax({
url: '/upload',
type: 'POST',
cache: false,
data: formData,
processData: false,
contentType: false
}).done(function(res) {
}).fail(function(res) {});

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="utf-8"/>
</bean>
@RequestMapping(value = "/import_tg_resource")
public ModelAndView import_tg_resource(@RequestParam(value = "file", required = false) MultipartFile[] files, HttpServletRequest request, ModelMap model) {
System.out.println("开始批量上传:文件数量：" + files.length);
for (MultipartFile file : files ) {
String path = request.getSession().getServletContext().getRealPath("upload");
String fileName = file.getOriginalFilename();
String prefix = fileName.substring(fileName.lastIndexOf("."));
fileName = new Date().getTime() + prefix;
// System.out.println("保存路径 " + path);
File targetFile = new File(path, fileName);
if(!targetFile.exists()){
targetFile.mkdirs();
}
file.transferTo(targetFile);
}
}