SpringMVC通过Controller上传文件

参考文献：https://www.cnblogs.com/wryd952532573/p/7509428.html

Step1:表单设置为post提交方式，并在表单中加入enctype="multipart/form-data"

<form id="fm" method="post" enctype="multipart/form-data">
<input type="file" name="scriptFile" style="width:169px;"/>
</form>

如果少了这个声明，可能会报错：Cannot convert value of type [java.lang.String] to required type [org.springframework.web.multipart.MultipartFile] for property 'xxxxx': no matchi 

Step2:配置文件中设置MultipartResolver
 

	<!-- 文件上传大小 -->
		<bean id="multipartResolver"
		class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<property name="defaultEncoding" value="UTF-8" />
		<!-- 所有文件容量之和不超过10M -->
		<property name="maxUploadSize" value="10000000" />
		<property name="maxInMemorySize" value="40960" />
	</bean>

Step3:Controller接受参数
 

@RequestMapping("/insert")
	public String insert(HttpServletResponse response, HttpServletRequest request,
			DeviceModel deviceModel)
			throws Exception
	{
		JSONObject result = new JSONObject();
		
		 if (deviceModel.getScriptFile() != null){
			 String tmpName = deviceModel.getScriptFile().getOriginalFilename();// 原始文件名
			 String fileName = StringUtil.getFileName()+tmpName.substring(tmpName.indexOf("."));//构造文件名
		    String path = request.getServletContext().getRealPath("/upload/imgs/deviceModel/");
		    //获取指定文件或文件夹在工程中真实路径，getRequest()这个方法是返回一个HttpServletRequest，封装这个方法为了处理编码问题
		    FileOutputStream fos = FileUtils.openOutputStream(new File(path+"/" +fileName));//打开FileOutStrean流
		    IOUtils.copy(deviceModel.getScriptFile().getInputStream(),fos);//将MultipartFile file转成二进制流并输入到FileOutStrean
		    fos.close();//
		 }
...

其中，DeviceModel实体类定义如下：

public class DeviceModel
{
	private MultipartFile  scriptFile;
...