springboot初步整合web（一）

1、整合filter

springboot-整合filter

方式1
@WebFilter(filtername urlpattern="拦截多个请求，{"*.do","*.action","/firstServlet",}")
public clsss FirstFilter implements Filter{
  //重写方法  
}
主启动
@ServletComponentScan
@SpringBootApplication



方式2
public class SecondFilter implements Filter{
  //重写方法
}
@SpringBootApplication
App2{
  @Bean//注册servlet
  public ServletRegistrationBean getServletRegistrationBean(){
    ServletRegistionBean bean = new ServletRegistrationBean(new SecondServlet())
    bean.addUrlMappings("/second")
    return bean;
  }
  @Bean//注册Filter
  public ServletRegistrationBean getServletRegistrationBean(){
    FilterRegistrationBean bean = new FilterRegistrationBean(new SecondFilter())
    bean.addUrlPatterns("/second")
    return bean;
  }
}

总结：
一个在其实现类中加注解参数实现
一个在其主启动类中用Bean注解+方法实现；

整合listener

<listener>
  <listener-class>com.bjsxt.listener.FirstListener</listener-class>
</listener>
@WebListener 不需要加额外的配置
public class FirstListener implements ServletContextListener{
  @override
  public void contextInitialized(ServletContextEvent e){

  }
}
@SpringBoogApplication
@ServletComponentsScan
class App{
  
}

整合springboot访问静态资源

整合springboot文件上传