1注册三大组件
@Configuration
public class MyServerConfig {
//注册三大组件
@Bean
public ServletRegistrationBean myServlet(){
ServletRegistrationBean registrationBean = new ServletRegistrationBean(new MyServlet(),"/myServlet");
registrationBean.setLoadOnStartup(1);
return registrationBean;
}
@Bean
public FilterRegistrationBean myFilter(){
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
registrationBean.setFilter(new MyFilter());
registrationBean.setUrlPatterns(Arrays.asList("/hello","/myServlet"));
return registrationBean;
}
@Bean
public ServletListenerRegistrationBean myListener(){
ServletListenerRegistrationBean<MyListener> registrationBean = new ServletListenerRegistrationBean<>(new MyListener());
return registrationBean;
}
}
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("MyFilter doFilter");
chain.doFilter(request,response);
}
@Override
public void destroy() {
}
}
public class MyListener implements ServletContextListener {
@Override
public void contextInitialized(ServletContextEvent sce) {
System.out.println("contextInitialized...web应用启动");
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
System.out.println("contextDestroyed...当前web项目销毁");
}
}
public class MyServlet extends HttpServlet {
//处理get请求
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("MyServlet doGet");
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("MyServlet doPost");
}
}
验证
2容器配置规则
@Configuration
public class MyServerConfig {//注册三大组件 .....
//配置嵌入式的Servlet容器
@Bean
public EmbeddedServletContainerCustomizer embeddedServletContainerCustomizer(){
return new EmbeddedServletContainerCustomizer() {//定制嵌入式的Servlet容器相关的规则,这里是修改端口号
@Override
public void customize(ConfigurableEmbeddedServletContainer container) {
container.setPort(8083);
}
};
}}
3切换容器
很简单，只要去掉某些jar，在添加要切换的容器jar
Tomcat（默认使用）
引入web模块默认就是使用嵌入式的Tomcat作为Servlet容器；
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring‐boot‐starter‐web</artifactId>
</dependency>
切换
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring‐boot‐starter‐web</artifactId>
<exclusions>
<exclusion>//去掉tomcat容器
<artifactId>spring‐boot‐starter‐tomcat</artifactId>
<groupId>org.springframework.boot</groupId>
</exclusion>
</exclusions>
</dependency><!‐‐引入undertow容器‐‐>
<dependency>
<artifactId>spring‐boot‐starter‐undertow</artifactId>
<groupId>org.springframework.boot</groupId>
</dependency>