1.導入jar包(m)

<!-- 文件上傳組件 不同的版本號-->
	<dependency>
		<groupId>org.apache.commons</groupId>
		<artifactId>commons-io</artifactId>
		<version>${commons-io.version}</version>
	</dependency>
	<dependency>
		<groupId>commons-fileupload</groupId>
		<artifactId>commons-fileupload</artifactId>
		<version>${commons-fileupload.version}</version>
	</dependency>

2.導入包之後，需要配置SpringMVC文件上傳解析器，在Springmvc配置文件裏配置如下。

<!-- 文件上傳解析器 -->
<bean id="multipartResolver"
       class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <!-- 最大允許上傳文件大小，單位byte -->
    <property name="maxUploadSize" value="100000000"/>
</bean>

3.編寫JSP代碼如下：

<form action="/springmvc01/upload/image.shtml" method="post" enctype="multipart/form-data">
	<input type="file" name="userimage" />
	<button>提交</button>
</form>

4.編寫後臺代碼：

/***
 * 文件上傳
 * @param session
 * @param file
 * @param model
 * @return
 * @throws IllegalStateException
 * @throws IOException
 */
@RequestMapping(value="/image",method=RequestMethod.POST)
public String upload(HttpSession session,@RequestParam(value="userimage")MultipartFile file,Model model) throws IllegalStateException, IOException{
	//文件上傳路徑
	String path = session.getServletContext().getRealPath("/upload");
	
	//文件名字
	String fname = (int)(Math.random()*10000)+file.getOriginalFilename();
	file.transferTo(new File(path+"/"+fname));
	
	//文件訪問路徑
	String fileurl = "/upload/"+fname;
	model.addAttribute("fileurl", fileurl);
	return "hello";
}

基於SpringMvc圖片上傳