第四十二章 SpringBoot注册Servlet/Filter/Listener

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1>注解注册
配置类添加@ServletComponentScan注解，添加对Servlet的描述支持

为Servlet实现类添加@WebServlet注解

@WebServlet(urlPatterns=""/servlet/test"", description="Servlet的说明")public class TestServlet extends HttpServlet {    ...} 为Filter实现类添加@WebFilter注解

@WebFilter(filterName=”myFilter”,urlPatterns=”/*”)

为Listener实现类添加@WebListener注解

@WebListener

2>通过RegistrationBean注册

@Bean
public ServletRegistrationBean servletRegistrationBean() {
return new ServletRegistrationBean(new XxServlet(), “/xx/*”);
}

@Bean
public FilterRegistrationBean filterRegistrationBean() {
FilterRegistrationBean registration = new FilterRegistrationBean();
registration.setFilter(new XxFilter());
registration.setOrder(2);
return registration;
}

@Bean
public ServletListenerRegistrationBean servletListenerRegistrationBean() {
return new ServletListenerRegistrationBean(new ZzListener());
}
“`

注在独立的容器（非内嵌）中 @ServletComponentScan 不起作用，取为代之的是容器内建的discovery机制。

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