Question

我试图将我的项目转换为Spring Boot项目（嵌入了Jetty的可执行jar文件）。所有这些都与标准示例有关，但我希望将旧的web.xml迁移到Spring Boot。

我迁移了Servlet和过滤器，但我不明白如何迁移过滤器：

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
    <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
<listener>
    <listener-class>org.granite.config.GraniteConfigListener</listener-class> 
</listener> 
    <listener>
    <listener-class>org.granite.gravity.websocket.GravityWebSocketDeployer</listener-class>
</listener>

我创建了@SpringBootApplication类，并在所有配置中编写了：

@Bean
@Order(1)
public FilterRegistrationBean springSecurityFilterChain() {     
    FilterRegistrationBean filterRegBean = new FilterRegistrationBean();
    DelegatingFilterProxy delegatingFilterProxy = new DelegatingFilterProxy();
    filterRegBean.setFilter(delegatingFilterProxy);
    List<String> urlPatterns = new ArrayList<String>();
    urlPatterns.add("/*");
    filterRegBean.setUrlPatterns(urlPatterns);
    return filterRegBean;
}

有人可以解释我应该如何转换听众吗？

Answer 1

Spring Boot将使用servlet容器自动注册以下任何类型的@Beans：

ServletContextAttributeListener
ServletRequestListener
ServletRequestAttributeListener
HttpSessionAttributeListener
HttpSessionListener
的ServletContextListener

例如，要注册GravityWebSocketDeployer，ServletContextListener为您的配置类添加@Bean方法：

@Bean
public GravityWebSocketDeployer gravityWebSocketDeployer() {
    return new GravityWebSocketDeployer();
}

Answer 2

对于RequestContext，请阅读this

 @Bean
    @ConditionalOnMissingBean(RequestContextListener.class)
    public RequestContextListener requestContextListener() {
        return new RequestContextListener();
    }

对于其他侦听器，当您使用spring-boot时会自动注册，因为this链接意味着。

对于你自己的听众。

public class MyAdditionListeners extends SpringBootServletInitializer {

    protected final Log logger = LogFactory.getLog(getClass());

    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        WebApplicationContext rootAppContext = createRootApplicationContext(servletContext);
        if (rootAppContext != null) {
            servletContext.addListener(new YourListenerHere());
        }
        else {
            this.logger.debug("No ContextLoaderListener registered, as "
                    + "createRootApplicationContext() did not "
                    + "return an application context");
        }
    }

最后有一个link，您可以在其中找到有关侦听器和SpringApplication类的一些信息。阅读部分

Answer 3

Spring Boot也会自动注册HttpServlet的任何@Bean扩展名;

   @Bean
   public ServletRegistrationBean axisServletRegistrationBean() {
      ServletRegistrationBean registration = new ServletRegistrationBean(new AxisServlet(), "/services/*");
      registration.addUrlMappings("*.jws");
      return registration;
   }

Spring引导转换web.xml监听器

3 个答案: