java Springboot实现多文件上传功能

<div class="layui-form-item">
 <label class="layui-form-label">上传文件</label>
 <div class="layui-input-block">
 <div class="layui-upload">
 <button type="button" class="layui-btn layui-btn-normal" id="testList">选择多文件</button>
 <div class="layui-upload-list">
 <table class="layui-table">
 <thead>
 <tr><th>文件名</th>
 <th>大小</th>
 <th>状态</th>
 <th>操作</th>
 </tr></thead>
 <tbody id="demoList"></tbody>
 </table>
 </div>
 <button type="button" class="layui-btn" id="testListAction">开始上传</button>
 </div>
  </div>
</div>

layui.use('upload', function(){
  var $ = layui.jquery,upload = layui.upload;
  //多文件列表示例
  var demoListView = $('#demoList')
    ,uploadListIns = upload.render({
    elem: '#testList'
    ,url: '/upload'
    ,accept: 'file'
    ,data:{} //可放扩展数据 key-value
    ,multiple: true
    ,auto: false
    ,bindAction: '#testListAction'
    ,choose: function(obj){
     var files = this.files = obj.pushFile(); //将每次选择的文件追加到文件队列
     //读取本地文件
     obj.preview(function(index, file, result){
      var tr = $(['<tr id="upload-'+ index +'">'
       ,'<td>'+ file.name +'</td>'
       ,'<td>'+ (file.size/1014).toFixed(1) +'kb</td>'
       ,'<td>等待上传</td>'
       ,'<td>'
       ,'<button class="layui-btn layui-btn-mini demo-reload layui-hide">重传</button>'
       ,'<button class="layui-btn layui-btn-mini layui-btn-danger demo-delete">删除</button>'
       ,'</td>'
       ,'</tr>'].join(''));
 
      //单个重传
      tr.find('.demo-reload').on('click', function(){
       obj.upload(index, file);
      });
 
      //删除
      tr.find('.demo-delete').on('click', function(){
       delete files[index]; //删除对应的文件
       tr.remove();
       uploadListIns.config.elem.next()[0].value = ''; //清空 input file 值，以免删除后出现同名文件不可选
      });
 
      demoListView.append(tr);
     });
    }
    ,done: function(res, index, upload){
     if(res.code == 0) //上传成功
      var tr = demoListView.find('tr#upload-'+ index)
       ,tds = tr.children();
     tds.eq(2).html('<span style="color: #5FB878;">上传成功</span>');
     tds.eq(3).html(''); //清空操作
     return delete this.files[index]; //删除文件队列已经上传成功的文件
 
    } //code为后台传回来的数据，具体多少自己定，
 
    //后台只能传回json格式数据，不然会走error函数；
 
    ,error: function(index, upload){
 
   }
 })
});

public String uploadNoticeFile(MultipartFile fileList) {
  try{
   String pathname = filepath;
   String timeMillis = Long.toString(System.currentTimeMillis());//时间戳
   String filename = timeMillis + fileList.getOriginalFilename();
   File dir = new File(pathname);
   if (!dir.exists()) {
    dir.mkdirs();
   }
   String filepath = pathname + filename;
   File serverFile = new File(filepath);
   fileList.transferTo(serverFile);
 
   //存入数据库
   NoticeFile noticeFile = new NoticeFile();
   noticeFile.setNoFileName(filename);
   noticeFile.setNoFilePath(filepath);
   noticeFile.setNoId(0L);
   noticeFileRepository.save(noticeFile);
   return "1";
 
  }catch (Exception e) {
   e.printStackTrace();
   return "0";
  }
 
 }

@RequestMapping(value = "/upload", method = RequestMethod.POST)
 @ResponseBody
 public Map<String, Object> noticeFile(@RequestParam(name = "file") MultipartFile files) {
  String msg = noticeFileService.uploadNoticeFile(files);
 
  Map map = new HashMap();
  if (msg == "1") {
   map.put("code", "0");
  } else {
   map.put("code", "1");
  }
  return map;
 }