SpringBoot----整合 Servlet

一.通过注解扫描完成 Servlet 组件的注册

1.1 编写 servlet

package com.bjsxt.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** *SpringBoot整合Servlet方式一 * *<servlet> * <servlet-name>FirstServlet</servlet-name> * <servlet-class>com.bjsxt.servlet.FirstServlet</servlet-class> *</servlet> * *<servlet-mapping> * <servlet-name>FirstServlet</servlet-name> * <url-pattern>/first</url-pattern> *</servlet-mapping> * */ @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............"); } }

1.2 编写启动类

package com.bjsxt; import javax.servlet.annotation.WebServlet; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.ServletComponentScan; /** * SpringBoot整合Servlet方式一 * * */ @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); } }

二.通过方法完成 Servlet 组件的注册

2.1 编写 servlet

package com.bjsxt.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** *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("SecondServlet.........."); } }

2.2 编写启动类

package com.bjsxt; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.ServletRegistrationBean; import org.springframework.context.annotation.Bean; import com.bjsxt.servlet.SecondServlet; /** * SpringBoot整合Servlet方式二 * * */ @SpringBootApplication public class App2 { public static void main(String[] args) { SpringApplication.run(App2.class, args); } @Bean public ServletRegistrationBean getServletRegistrationBean(){ ServletRegistrationBean bean = new ServletRegistrationBean(new SecondServlet()); bean.addUrlMappings("/second"); return bean; } }