很久沒有寫文件上傳的代碼了，以下代碼支持異步上傳，備註一下。

1.頁面設置

<div>
<input type="file" class="easyui-linkbutton" id="excelFile" name="excelFile" size="20" maxlength="20"/>

<input type="button" class="easyui-linkbutton" onClick="uploadFile();" style="width:80px" value="上傳" />

</div>

2. js 代碼

    function uploadFile() {
    	var url = "upload.htm?method=upload‘)";

		var formData = new FormData();
		formData.append(‘excelFile‘, $(‘#excelFile‘)[0].files[0]);
		jQuery.ajax({
		    url: url,
		    type: ‘POST‘,
		    cache: false,
		    data: formData,
		    processData: false,
		    contentType: false
		}).done(function(res) {
			console.log(res);
		}).fail(function(res) {
			console.log("failed="+res);
		});
    }
    
    </

3. Action code

 @RequestMapping(value="/upload.htm", params = "method=upload")
	public String upload(@RequestParam("excelFile") MultipartFile file, ModelMap model,HttpServletResponse response) {
    
    String fileName = file.getOriginalFilename();
    InputStream is = file.getInputStream();
}

ajax springMvc 異步 上傳 文件