用AJAX异步提交表单上传多个文件（type=‘file‘）案例

今天药忘吃喽~ 2022-05-28 06:19 528阅读 0赞

因为在框架中上传文件时不适合直接用form提交，因为这样会刷新页面。我们一般会用ajax进行异步上传。此方法可上传多种类型文件。

html代码：

注意如果要多选文件需要在input上增加属性 multiple="multiple"

<form action="uploadTrainProduct" method="post" enctype="multipart/form-data" id="form1">
        <div class="modal fade" id="trainInfoModal" tabindex="-1" role="dialog" aria-labelledby="orderInfoModalLabel"
             aria-hidden="true">
            <div class="modal-dialog">
                <div class="modal-content">
                    <div class="modal-header">
                        <button type="button" class="close" data-dismiss="modal" aria-hidden="true">
                            ×
                        </button>
                        <h4 class="modal-title" id="orderInfoModalLabel1">
                            培训产品上传
                        </h4>
                    </div>
                    <div class="modal-body">
                        <div class="row" style="margin-top: 10px">
    
                            <div class="col-sm-5 " style="text-align:center;">
    
                                <label for="file"class="btn btn-default">上传培训产品</label>
    
                                <input id="file"type="file"style="display:none" class="form-control" name="file" multiple="multiple">
                                
                            </div>
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-default" data-dismiss="modal">关闭
                        </button>
                        <button type="button" class="btn btn-primary" onclick="uploadTrainProduct()">
                            确定
                        </button>
                    </div>
                </div>
            </div>
        </div>
    </form>

js:

function uploadTrainProduct(){
        var formData = new FormData($("#form1")[0]);  //重点：要用这种方法接收表单的参数
        $.ajax({
            url : "/it/orderManage/uploadTrainProduct",
            type : 'POST',
            data : formData,
            // 告诉jQuery不要去处理发送的数据
            processData : false,                 
            // 告诉jQuery不要去设置Content-Type请求头
            contentType : false,
            async : false,
            success : function(data) {
                if(data){
                }
            }
        });
    }

java代码：

@RequestMapping(value = "/uploadTrainProduct", method = RequestMethod.POST, produces = "text/html;charset=utf-8")
        @ResponseBody
        public String uploadTrainProduct(
                @RequestParam(value = "file") MultipartFile[] files,  //这样接收文件
                @RequestParam(value = "id") String id,            //接收其他参数
                @RequestParam(value = "content") String content,
                HttpServletRequest request
        ) {
            try {
                for (MultipartFile file : files) {    //循环保存文件
                    uploadFile(file, request);
                }
                // 返回前台
                return "success";
    
            } catch (Exception e) {
                e.printStackTrace();
                return "fail";
            }
    
        }
    
        public String uploadFile(MultipartFile file, HttpServletRequest request) throws IOException {
            String fileName = file.getOriginalFilename();
            String path="d:/images/m2";            //设置文件保存路径
    //        File tempFile = new File(path, new Date().getTime() + String.valueOf(fileName));
            File tempFile = new File(path, String.valueOf(fileName));
            if (!tempFile.getParentFile().exists()) {    //创建文件夹
                tempFile.getParentFile().mkdir();
            }
            if (!tempFile.exists()) {
                tempFile.createNewFile();
            }
            file.transferTo(tempFile);
            return "images/" + tempFile.getName();
        }

可以试试，非常好用