spring-Mvc-文件上传（Controller）

最新推荐文章于 2024-05-06 04:15:00 发布

原创最新推荐文章于 2024-05-06 04:15:00 发布 · 1.2k 阅读

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1.controller

@RequestMapping("/toUpload.do")
	public String toUpload() {
		//---跳转到upload.jsp
		return "upload";
	}

@RequestMapping("/upload.do")
public String upload(HttpServletRequest request) throws IOException {
    //转换request
	MultipartHttpServletRequest mr=(MultipartHttpServletRequest) request;
	//获得文件
	MultipartFile file=mr.getFile("pic");
	//获得文件的字节数组
	byte[] by=file.getBytes();
	
	
	String fileName=new SimpleDateFormat("yyyyMMdd").format(new Date());
	Random r1=new Random();
	for (int i = 0; i < 3; i++) {
		fileName=fileName+r1.nextInt(10);
	}
	//获得文件的原始文件名，后缀，项目部署路径
	String orgname=file.getOriginalFilename();
	String suffix=orgname.substring(orgname.lastIndexOf("."));
	String real=request.getSession().getServletContext().getRealPath("/");
	//组装文件的全路径
	String picname=real+"\\upload\\"+fileName+suffix;
	
	//定义输出流
	OutputStream out=new FileOutputStream(picname);
	out.write(by);
	out.flush();
	return "success";
}

2.upload.jsp

<body>
    	<form action="test/upload.do" method="post" enctype="multipart/form-data">
    			文件: <input type="file" name="pic"><br/>
    			<input type="submit" value="click">
    	</form>
  </body>

3.视图解析器应为

 	     <bean  id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
				<property name="maxUploadSize" value="104857600"></property>
				<property name="maxInMemorySize" value="4096"></property>
		</bean>

注意：
1.
method=“post”
enctype=“multipart/form-data” //容易拼写错误
2.
id=“multipartResolver”
bean的属性id和class都必须存在且id必须为multipartResolver