详解SpringMVC实现图片上传以及该注意的小细节

<form action="${path}/upload/uploadPic.do" method="post" enctype="multipart/form-data">   <div>    ![](${path}/mall/image/load_image.png)    <input type="file" id="input-image" name="input-image">    <input id="input-relative-path" name="imgs" type="hidden" >    <input id="input-last-path" type="hidden">    <input type="submit" value="上传图片"> </div></form>

@Controller@RequestMapping("/upload")public class UploadController extends BaseController {  @RequestMapping(value = "/uploadPic", method = RequestMethod.POST)  @LoginCheck  public void uploadPic(HttpServletRequest request, PrintWriter out, String lastRealPath) throws IOException {    // 将当前上下文初始化给CommonsMultipartResolver    CommonsMultipartResolver resolver = new CommonsMultipartResolver(request.getSession().getServletContext());    // 检查form中是否有enctype＝"multipart／form－data"    if (resolver.isMultipart(request)) {      // 强制转化request      MultipartHttpServletRequest req = (MultipartHttpServletRequest) request;      // 从表单获取input名称      Iterator<String> iterable = req.getFileNames();      // 存在文件      if (iterable.hasNext()) {        String inputName = iterable.next();        // 获得文件        MultipartFile mf = req.getFile(inputName);        byte[] mfs = mf.getBytes();        // 定义文件名        String fileName = new SimpleDateFormat("yyyyMMddHHmmssSSS").format(new Date());        Random random = new Random();        for (int i = 0; i < 3; i++) {          fileName = fileName + random.nextInt(10);        }        // 获得后缀名        String oriFileName = mf.getOriginalFilename();        String suffix = oriFileName.substring(oriFileName.lastIndexOf("."));        // 上传图片到本地        String localPath = "/Users/ZR/Desktop/webPro/console/src/main/webapp/image/" + fileName + suffix;        mf.transferTo(new File(localPath));        // 获取图片的宽高        BufferedImage bufferedImage = ImageIO.read(new FileInputStream(new File(localPath)));        int width = bufferedImage.getWidth();        int height = bufferedImage.getHeight();        // 获取文件大小        long size = mf.getSize();      }    }  }}

 <!--  文件上传的视图解析器，id值是固定的 --><bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  <property name="maxUploadSize" value="1024000"/>  <!-- 其他属性 --></bean>