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先附上圖片上傳的代碼
jsp代碼如下:
<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="上傳圖片"> </div> </form>
controller代碼:通過spring的方式實(shí)現(xiàn)
@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 { // 將當(dāng)前上下文初始化給CommonsMultipartResolver CommonsMultipartResolver resolver = new CommonsMultipartResolver(request.getSession().getServletContext()); // 檢查form中是否有enctype="multipart/form-data" if (resolver.isMultipart(request)) { // 強(qiáng)制轉(zhuǎn)化request MultipartHttpServletRequest req = (MultipartHttpServletRequest) request; // 從表單獲取input名稱 Iterator<String> iterable = req.getFileNames(); // 存在文件 if (iterable.hasNext()) { String inputName = iterable.next(); // 獲得文件 MultipartFile mf = req.getFile(inputName); byte[] mfs = mf.getBytes(); // 定義文件名 String fileName = new SimpleDateFormat("yyyyMMddHHmmssSSS").format(new Date()); Random random = new Random(); for (int i = 0; i < 3; i++) { fileName = fileName + random.nextInt(10); } // 獲得后綴名 String oriFileName = mf.getOriginalFilename(); String suffix = oriFileName.substring(oriFileName.lastIndexOf(".")); // 上傳圖片到本地 String localPath = "/Users/ZR/Desktop/webPro/console/src/main/webapp/image/" + fileName + suffix; mf.transferTo(new File(localPath)); // 獲取圖片的寬高 BufferedImage bufferedImage = ImageIO.read(new FileInputStream(new File(localPath))); int width = bufferedImage.getWidth(); int height = bufferedImage.getHeight(); // 獲取文件大小 long size = mf.getSize(); } } } }
spring-mvc.xml代碼:
<!-- 文件上傳的視圖解析器,id值是固定的 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="maxUploadSize" value="1024000"/> <!-- 其他屬性 --> </bean>
功能的實(shí)現(xiàn)其實(shí)很簡單,但是對(duì)于初學(xué)者還是需要注意如下幾個(gè)點(diǎn)
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