大神幫我看看為什么servlet中不能打印出來前臺： <form?action="/UploadServlet"?method="post"?enctype="multipart/form-data"> 請選擇圖片：<input?id="myfile"?name="myfile"?type="file"> <input?type="submit"?value="上傳"> </form>web.xml:??<servlet>??<servlet-name>UploadServlet<servlet-name>??<servlet-class>com.imooc.servlet.UploadServlet<servlet-class>??<servlet>??<servlet-mapping>??<servlet-name>UploadServlet<servlet-name>??<url-pattern>/UploadServlet</url-pattern>??<servlet-mapping>servlet: protected?void?doPost(HttpServletRequest?req,?HttpServletResponse?resp)?throws?ServletException,?IOException?{ //?TODO?Auto-generated?method?stub System.out.println("已接收到請求"); }