springMVC上传图片
一、需要导入springmvc文件上传的jar包，否则会出现异常java.lang.NoClassDefFoundError: org/apache/commons/fileupload/FileItemFactory
二、创建上传页面form表单
1 <form action="upload/uploadPic.do" method="post" enctype="multipart/form-data"> 2 <input type="file" name="pic"> 3 <br> 4 <input type="submit" value="submit"> 5 </form>
三、在springMVC配置文件中设置文件上传配置
1 <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> 2 <!-- 以字节为单位 --> 3 <property name="maxUploadSize" value="1024000"></property> 4 </bean>
四、controller类的编写
1 //跳转到表单页 2 @RequestMapping("/toForm.do") 3 public String toForm(){ 4 return "form1"; 5 } 6 7 //文件上传 8 @RequestMapping("/uploadPic.do") 9 public String uploadPic(HttpServletRequest req) throws IOException{ 10 MultipartHttpServletRequest mr = (MultipartHttpServletRequest) req; 11 //获得文件 12 MultipartFile file = mr.getFile("pic"); 13 //获得文件字节数组 14 byte[] bs = file.getBytes(); 15 //根据时间及随机数创建文件名 16 String fileName = new SimpleDateFormat("yyyyMMddHHmmssSSS").format(new Date()); 17 Random random = new Random(); 18 for(int i = 0;i < 3;i++){ 19 fileName = fileName + random.nextInt(10); 20 } 21 //获得文件的原始文件名 22 String originalFilename = file.getOriginalFilename(); 23 //对原始文件名切割获得后缀名 24 String suffix = originalFilename.substring(originalFilename.lastIndexOf(".")); 25 //获得项目路径 26 String realPath = req.getSession().getServletContext().getRealPath("/"); 27 //创建字节输出流 28 OutputStream out = new FileOutputStream(new File(realPath + "/upload/" + fileName + suffix)); 29 out.write(bs); 30 out.flush(); 31 out.close(); 32 return "success"; 33 }
