extends HttpServlet类重写doGet()或doPost()方法

web.xml配置

DateServlet.classpublic class DateServlet extends HttpServlet {@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Date date = new Date(); String data = sdf.format(date); resp.getOutputStream().write(data.getBytes());}}web.xml<servlet>//定义servlet的名字<servlet-name>dateServlet</servlet-name>//Tomcat会根据该值反射创建servlet对象 <servlet-class>com.neu.day01.DateServlet</servlet-class></servlet>//配置当前servlet能处理怎样的url请求<servlet-mapping><servlet-name>dateServlet</servlet-name><url-pattern>/dateServlet</url-pattern></servlet-mapping>

结果