在Web项目中集成Spring

package cn.itcast.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.context.WebApplicationContext; import org.springframework.web.context.support.WebApplicationContextUtils; import cn.itcast.service.UserService; public class UserServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { /*ApplicationContext applicationContext = new ClassPathXmlApplicationContext( "applicationContext.xml");*/ WebApplicationContext applicationContext = WebApplicationContextUtils.getWebApplicationContext(getServletContext()); UserService userService = (UserService) applicationContext .getBean("userService"); userService.sayHello(); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }