SpringBoot+layui实现文件上传

页面代码(只需要引入基础layui的css与js)

<fieldset class="layui-elem-field layui-field-title" style="margin-top: 30px;">
  <legend>多文件列表上传</legend>
</fieldset> 
 
<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>

JS

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/uploadFile'
    ,accept: 'file'
    ,multiple: true
    ,auto: false
    ,size: 5120
    ,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
      }
      this.error(index, upload);
    }
    ,error: function(index, upload){
      var tr = demoListView.find('tr#upload-'+ index)
      ,tds = tr.children();
      tds.eq(2).html('<span style="color: #FF5722;">上传失败</span>');
      tds.eq(3).find('.demo-reload').removeClass('layui-hide'); //显示重传
    }
  });
  
});

后台接收

public final static String UPLOAD_FILE_PATH = "D:\\uploadFile\\";
    
    @RequestMapping(value = "uploadFile")
    public String uploadImage(@RequestParam("file") MultipartFile file) {
        if (!file.isEmpty()) {
            Map<String, String> resObj = new HashMap<>(MAP_SIZE);
            try {
                BufferedOutputStream out = new BufferedOutputStream(
                        new FileOutputStream(new File(UploadManageDTO.UPLOAD_FILE_PATH, file.getOriginalFilename())));
                out.write(file.getBytes());
                out.flush();
                out.close();
                uploadManageService.addFile(file);
            } catch (IOException e) {
                resObj.put("msg", "error");
                resObj.put("code", "1");
                return JSONObject.toJSONString(resObj);
            }
            resObj.put("msg", "ok");
            resObj.put("code", "0");
            return JSONObject.toJSONString(resObj);
        } else {
            return null;
        }
    }