以編程方式添加過濾器和初始化參數

Question

我需要將web.xml的內容複製到WebAppInitializer.class（Java配置類）。我已經從web.xml複製了YahooFilter類（請參閱代碼），但我不確定如何實用地添加init-params。

我粘貼了下面的Java配置類的web.xml和代碼片段。有人可以看看並提供一些反饋嗎？

<web-app> 
    <display-name>sample</display-Aname> 
    <filter> 
     <filter-name>YOSFilter</filter-name> 
     <filter-class>com.yahoo.yos.YahooFilter</filter-class> 


     <!-- 
     optional param - 
     underlying oauth client class 
     possible values: 
      net.oauth.client.URLConnectionClient (default) 
      net.oauth.client.httpclient3.HttpClient3 
      net.oauth.client.httpclient4.HttpClient4 
     --> 
     <init-param> 
      <param-name>oauthConnectionClass</param-name> 
      <param-value>net.oauth.client.httpclient4.HttpClient4</param-value> 
     </init-param> 
     <!-- 
     optional param - 
     redirect end-user if an access token is not found, set to false if you 
     are only making two-legged oauth calls e.g. oauth calls without an 
     access token to retrieve public information 
     defauts to true 
     --> 
     <init-param> 
      <param-name>redirect</param-name> 
      <param-value>true</param-value> 
     </init-param> 
    </filter> 


    <!-- 
    The URL where the filter is mapped to will redirect the user to Yahoo for 
    authorization if an OAuth authorization token has not been obtained for the 
    user. Should correspond to your callback url 
    --> 


    <filter-mapping> 
     <filter-name>YOSFilter</filter-name> 
     <url-pattern>/login.jsp</url-pattern> 
    </filter-mapping> 
</web-app> 

的Java配置類

public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer { 
    ... 

      @Override 
     protected void registerDispatcherServlet(ServletContext servletContext) { 
        super.registerDispatcherServlet(servletContext); 
      servletContext.addListener(new HttpSessionEventPublisher()); 

      // servletContext.addListener(new RequestContextListener());  
     } 

      @Override 
      protected Filter[] getServletFilters() { 
        DelegatingFilterProxy delegatingFilterProxy = new DelegatingFilterProxy(); 
        delegatingFilterProxy.setTargetBeanName("springSecurityFilterChain"); 
        // FilterConfig filterConfig = delegatingFilterProxy.getFilterConfig(); 

        YahooFilter yosFilter = new YahooFilter(); 


        return new Filter[] {delegatingFilterProxy,yosFilter}; 
      } 
    } 

Answer 1

嘗試重寫onStartup()方法和編程與ServletContext這樣註冊您的過濾器：

@Override 
public void onStartup(ServletContext servletContext) throws ServletException { 
    FilterRegistration yahooFilter = servletContext.addFilter("yahooFilter", new YahooFilter()); 
    yahooFilter.setInitParameter("oauthConnectionClass", "net.oauth.client.httpclient4.HttpClient4"); 
    yahooFilter.setInitParameter("redirect", "true"); 
}