SpringBoot快速入门第二章，整合Servlet (小白都能看得懂）

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/liushuai52013/article/details/87910376

主要内容

整合Servlet

一、整合Servlet

1.1 编写Servlet

/**
 * 之前的配置方式
 *  <servlet>
 *      <servlet-name>FirstServlet</servlet-name>
 *      <servlet-class>com.ls.springboot.servlet.FirstServlet</servlet-class>
 *  </servlet>
 *
 *  <servlet-mapping>
 *      <servlet-name>FirstServlet</servlet-name>
 *      <url-pattern>/first</url-pattern>
 *  </servlet-mapping>
 */

//springboot的第一种配置方式
@WebServlet(name="FirstServlet",urlPatterns="/first")
public class FirstServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        System.out.println("this is my  FirstServlet");
        super.doGet(req, resp);
 }
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doPost(req, resp);
    }
}

1.2 编写SpringBoot启动类

注意：启动器存放的位置，启动器可以和servlet位于同一个包下，或者位于servlet的上一级包中，但是不能放到servlet的平级以及子包下。

//springboot整合Servlet方式一
@SpringBootApplication
//在springboot启动时会扫描@WebServlet，并将该类实例化
@ServletComponentScan
public class Application {

	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}

}

二、通过完成Servlet组件的祖册

2.1 编写servlet

/**
 * SpringBoot整合Servlet方式二
 */
public class SecondServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        System.out.println("this is  my  SecondServlet");
    }
}

2.1 编写springboot启动类

//springboot整合servlet方式二
@SpringBootApplication
public class App {
    public static void main(String []args){
        SpringApplication.run(App.class,args);
    }


    /**
     * 注册Servlet
     * @return
     */
    @Bean
    public ServletRegistrationBean getServletRegistrationBean(){
        ServletRegistrationBean bean = new ServletRegistrationBean(new SecondServlet());
        bean.addUrlMappings("/second");
        return bean;
    }


}

SpringBoot入门项目地址下载: GitHub