$("#file-0a").fileinput({
uploadUrl : "/upload_img",//上传图片的url
allowedFileExtensions : [ 'jpg', 'png', 'gif' ],
overwriteInitial : false,
maxFileSize : 1000,//上传文件最大的尺寸
maxFilesNum : 1,//上传最大的文件数量
initialCaption: "请上传商家logo",//文本框初始话value
//allowedFileTypes: ['image', 'video', 'flash'],
slugCallback : function(filename) {
return filename.replace('(', '_').replace(']', '_');
}
});

$('#file-0a').on('fileuploaded', function(event, data, previewId, index) {
var form = data.form, files = data.files, extra = data.extra,
response = data.response, reader = data.reader;
console.log(response);//打印出返回的json
console.log(response.paths);//打印出路径
});

<input id="file-0a" class="file" type="file" multiple
data-min-file-count="1" name="upload_logo">

import java.util.List;
public class Picture {
private List<String> paths;
public List<String> getPaths()
{
return paths;
}
public void setPaths(List<String> paths)
{
this.paths = paths;
} 
}

@ResponseBody
@RequestMapping(value="upload_img",method=RequestMethod.POST)
public Picture uploadImage(@RequestParam MultipartFile[] upload_logo) throws IOException{
log.info("上传图片");
Picture pic = new Picture();
List<String> paths = new ArrayList<String>();
String dir = UploadUtil.getFolder();
for(MultipartFile myfile : upload_logo){ 
if(myfile.isEmpty()){ 
log.info("文件未上传"); 
}else{ 
log.info("文件长度: " + myfile.getSize()); 
log.info("文件类型: " + myfile.getContentType()); 
log.info("文件名称: " + myfile.getName()); 
log.info("文件原名: " + myfile.getOriginalFilename()); 
log.info("========================================");
//上传文件 返回路径
String path = UploadUtil.writeFile(myfile.getOriginalFilename(), dir, myfile.getInputStream());
log.info("文件路径:"+path);
paths.add(path);
} 
} 
pic.setPaths(paths);
return pic;
}

private static final Logger log = LoggerFactory.getLogger(UploadUtil.class);
private UploadUtil() {
}
private static SimpleDateFormat fullSdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
private static SimpleDateFormat folder = new SimpleDateFormat(
"yyyy" + File.separator + "MM" + File.separator + "dd");
/**
* 返回yyyy File.separator MM File.separator dd格式的字符串
* 
* @return
*/
public static String getFolder() {
return folder.format(new Date());
}
/**
* 文件上传
* 
* @param srcName
* 原文件名
* @param dirName
* 目录名
* @param input
* 要保存的输入流
* @return 返回要保存到数据库中的路径
*/
public static String writeFile(String srcName, String dirName, InputStream input) throws IOException {
log.info(srcName);
// 取出上传的目录，此目录是tomcat的server.xml中配置的虚拟目录
String uploadDir = ContextUtil.getSysProp("upload_dir");//设置你上传路径
// 取出虚拟目录的访问路径
String virtualDir = ContextUtil.getSysProp("virtual_dir");//设置你虚拟目录访问路径
// 重命名文件
if (null != srcName) {
srcName = srcName.substring(srcName.indexOf("."));
} else {
srcName = ".jpg";
}
String filename = "";
// 得到要上传的文件路径
filename = uploadDir + File.separator + dirName + File.separator + fullSdf.format(new Date()) + srcName;
// 得到将要保存到数据中的路径
String savePath = filename.replace(uploadDir, "");
savePath = virtualDir + savePath.replace("\\", "/");
File file = new File(filename);
if (!file.getParentFile().exists()) {
file.getParentFile().mkdirs();
}
FileOutputStream fos = new FileOutputStream(file);
// 一次30kb
byte[] readBuff = new byte[1024 * 30];
int count = -1;
while ((count = input.read(readBuff, 0, readBuff.length)) != -1) {
fos.write(readBuff, 0, count);
}
fos.flush();
fos.close();
input.close();
return savePath;
}