在servlet目录下创建个servlet类，示例代码如下：

package com.bjpowernode.springboot.servlet;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;public class HeServlet extends HttpServlet {    @Override    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {       resp.getWriter().write("he springboot servlet");       resp.getWriter().flush();       resp.getWriter().close();    }    @Override    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {       doGet(req,resp);    }}

编写配置类：

package com.bjpowernode.springboot.config;import com.bjpowernode.springboot.servlet.HeServlet;import org.springframework.boot.web.servlet.ServletRegistrationBean;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import javax.servlet.ServletRegistration;@Configurationpublic class ServletConfig {    @Bean    public ServletRegistrationBean heServletRegisterBen() {        ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(                new HeServlet(), "/servlet/heservlet"        );        return servletRegistrationBean;    }}

注意需要加的两个注解：@Configuration  还有@Bean

然后就可以启动springboot项目访问地址：http://localhost:8080/servlet/heservlet

进行测试了。