spring4零配置--添加servlet

1.实现AbstractAnnotationConfigDispatcherServletInitializer即可取代web.xml

/**
 * Base class for {@link org.springframework.web.WebApplicationInitializer}
 * implementations that register a
 * {@link org.springframework.web.servlet.DispatcherServlet DispatcherServlet}
 * configured with annotated classes, e.g. Spring's
 * {@link org.springframework.context.annotation.Configuration @Configuration} classes.
 *
 * <p>Concrete implementations are required to implement {@link #getRootConfigClasses()}
 * and {@link #getServletConfigClasses()} as well as {@link #getServletMappings()}.
 * Further template and customization methods are provided by
 * {@link AbstractDispatcherServletInitializer}.
 *
 * @author Arjen Poutsma
 * @author Chris Beams
 * @since 3.2
 */
public abstract class AbstractAnnotationConfigDispatcherServletInitializer

2.

/**
	 * 添加Servlet
	 */
	protected void registerDispatcherServlet(ServletContext servletContext) {
		super.registerDispatcherServlet(servletContext);
		try {
			 ServletRegistration.Dynamic dynamic= servletContext.addServlet("frontPay", (HttpServlet)Class.forName("com.unionpay.upop.sdk.common.FrontPayServLet").newInstance());
			 dynamic.addMapping("/frontPay");
		} catch (Exception e)
		{
			e.printStackTrace();
		}
	}