springmvc 表单 @RequestMapping 上传文件

	@RequestMapping(method = RequestMethod.POST)
	public String save(
			@RequestParam(value = "file", required = false) MultipartFile file,
			@Valid Store store, BindingResult result) {
		if (result.hasErrors()) {
			return "admin/store/create";
		}
		if (!file.isEmpty()) {
			try {
				byte[] bytes = file.getBytes();
				String path = UploadFileUtil.saveFile(bytes);
				store.setLogo(path);
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		store.setCreateTime(new Date());
		storeService.save(store);
		return "redirect:/admin/store/" + store.getId();
	}




网上看到的都是一个文件上传的例子,实际很多时候是与model一起提交上来的,今天试了一下,发现这2个参数的位置有讲究,换一下,就出错了。大致的错误是验证了错误,但是不能正常的返回提交页面,显示错误。具体原因没有调查

@RequestParam(value = "file", required = false) MultipartFile file
@Valid Store store


<html> 
	
    <head> 
		<title >layout title</title> 
	</head> 
	
	<body > 
		<form action="/admin/store" method="post" enctype="multipart/form-data"> 
	
<fieldset> 
	<legend > 
		添加    </legend> 
	<p> 
	<label >名称:</label> 
		                <input type="text" id="name" name="name" value="" >          </p> 
	
	<p> 
		<label >域名: </label> 
			                <input type="text" id="domainName" name="domainName" value="" >      	</p> 
	
	<p> 
		<label >地址: </label> 
		                <input type="text" id="address" name="address" value="" >      	</p> 
	
	<p> 
		<label >商标: </label> 
		<input type="file" name="file"/> 
	</p> 
	
	<p> 
		<label >&nbsp;</label> 
		<input type="submit" value="添加"/> 
	</p> 
	
</fieldset> 
 
</form> 
    </body> 
</html> 
 


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