java Springboot实现多文件上传

前端采用layui框架,讲解多文件上传的完整实现功能。

前端html重点代码如下:

        		<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>

相应的,js代码如下所示:

        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){

                }
            })
        });

以上即是前端功能的实现,后端方面,在Service层Impl下创建文件上传的函数:

    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";
        }

    }

NoticeFile是我个人在写项目时创建的类,读者可根据实际情况自行运用。

然后,在controller层中创建相应的函数:

    @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;
    }
以上,即实现了多文件上传的全部功能。

猜你喜欢

转载自blog.csdn.net/weixin_42259631/article/details/80999415