以编程方式添加过滤器和初始化参数

Question

我需要将web.xml的内容复制到WebAppInitializer.class（Java配置类）。我已经从web.xml复制了YahooFilter类（请参阅代码），但我不确定如何实用地添加init-params。

我粘贴了下面的Java配置类的web.xml和代码片段。有人可以看看并提供一些反馈吗？

<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配置类

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

尝试重写onStartup()方法和编程与ServletContext这样注册您的过滤器：

@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"); 
}