SpringBoot整合Servelt

1.1通过注解扫描完成servlet组件的注册

编写servlet

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@WebServlet(name="FirstServlet",urlPatterns="/first")
public class FirstServlet extends HttpServlet {
@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		System.out.println("FirstServlet............");
	}
}

编写启动类

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@SpringBootApplication
@ServletComponentScan //在springBoot启动时会扫描@WebServlet，并将该类实例化
public class App {
	public static void main(String[] args) {
		SpringApplication.run(App.class, args);
	}
}

1.2 通过方法完成Servlet组件的注册

编写servlet

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public class SecondServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		System.out.println("SecondServlet..........");
	}
}

编写启动类

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@SpringBootApplication
public class App {
	public static void main(String[] args) {
		SpringApplication.run(App.class, args);
}
@Bean
public ServletRegistrationBean<?> getServletRegistrationBean(){
		ServletRegistrationBean<?> bean = new ServletRegistrationBean<SecondServlet>(new SecondServlet());
		bean.addUrlMappings("/second");
    	return bean;
	}
}