SpringBoot整合Servlet

方式一、通過註解掃描的方式

• 1、新建一個Servlet然後使用註解@WebServlet(name=“XXXServlet”,urlPatterns="/XXX")

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

• 2、在啟動類前加@ServletConponentScan,在SpringBoot啟動時會掃描@WebServlet的註解，
  並將該類例項化

@SpringBootApplication
@ServletComponentScan
public class CrmApplication {
   public static void main(String[] args) {
       SpringApplication.
 
run(CrmApplication.class, args);
   }
}

方式二、通過方法來整合

• 1、編寫Servlet不再需要註解，
• 2、編寫啟動類，在啟動類中加一個方法

@SpringBootApplication
public class CrmApplication {
  public static void main(String[] args) {
      SpringApplication.run(CrmApplication.class, args);
  }
  //註冊servlet
  @Bean
  public ServletRegistrationBean get
 
(){
      ServletRegistrationBean bean=new ServletRegistrationBean(new MyServlet());
      bean.addUrlMappings("/second");
      return bean;
  }
}