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;
  }