1. 如何定制和修改Servlet容器的相关配置
   　a. 修改和Server有关的配置（ServerProperties）

server.port=8084
server.servlet.context-path=/crud
server.tomcat.uri-encoding=UTF-8
# 通用的servlet容器配置
server.xxx
// tomcat的配置
server.tomcat.xxx

servlet.png

2. 注册Servlet,Filter,Listener
   ServletRegistrationBean
   FilterRegistrationBean
   ServletListenerRegistrationBean

@Configuration
public class myMVConfig implements WebMvcConfigurer{

// 注册servlet
    @Bean
    public ServletRegistrationBean<Servlet> myServlet(){
        ServletRegistrationBean registrationBean = new ServletRegistrationBean<>(new MyServlet(), "/myServlet");
        registrationBean.setLoadOnStartup(1);
        return registrationBean;
    }
//    注册监听器
   @Bean
    public ServletListenerRegistrationBean<MyListener> myLister(){
        ServletListenerRegistrationBean<MyListener> listener = new ServletListenerRegistrationBean<>();
        listener.setListener(new MyListener());
        return listener;
    }

// 注册过滤器
    @Bean
    public FilterRegistrationBean<MyFilter> myFilter(){
        FilterRegistrationBean<MyFilter> registrationBean = new FilterRegistrationBean<>();
        registrationBean.setFilter(new MyFilter());
        registrationBean.setUrlPatterns(Arrays.asList("/main.html"));
        return registrationBean;

    }

myServlet

public class MyServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        super.doPost(req,resp);
    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
       resp.getWriter().write("这是我自己的servlet");
    }
}

myFIlter

public class MyFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        System.out.println("执行前");
        chain.doFilter(request,response);
        System.out.println("执行后");
    }

    @Override
    public void destroy() {

    }
}

myListener

public class MyListener implements ServletContextListener {
    @Override
    public void contextInitialized(ServletContextEvent sce) {
        System.out.println("web容器启动了");
    }

    @Override
    public void contextDestroyed(ServletContextEvent sce) {
        System.out.println("web容器停止了");
    }
}

3. 替换为其他嵌入式Servlet容器

默认支持
Tomcat(默认使用)
Jetty
Undertow

切换其他容器

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                    <groupId>org.springframework.boot</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <artifactId>spring-boot-starter-jetty</artifactId>
            <groupId>org.springframework.boot</groupId>
        </dependency>