SpringBoot 源码解析 （七）----- Spring Boot的核心能力 - 自定义Servlet、Filter、Listener是如何注册到Tomcat容器中的？（SpringBoot实现SpringMvc的原理）

上一篇我们讲了SpringBoot中Tomcat的启动过程，本篇我们接着讲在SpringBoot中如何向Tomcat中添加Servlet、Filter、Listener

自定义Servlet、Filter、Listener Spring容器中声明ServletRegistrationBean、FilterRegistrationBean、ServletListenerRegistrationBean

@Bean public ServletRegistrationBean customServlet() { return new ServletRegistrationBean(new CustomServlet(), "/custom"); } private static class CustomServlet extends HttpServlet { @Override protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { resp.getWriter().write("receive by custom servlet"); } }