在 Filter bean 类中使用一些 bean? [英] Using some beans in Filter bean class?

问题描述

在我的过滤器 bean 类中，我添加了一些 bean 依赖项(带有 @Autowired 注释).但是在方法 doFilter() 中，我所有的依赖 bean 都为 null ...

In my filter bean class, I added some beans dependency (with @Autowired annotation). But in the method doFilter(), all my dependency beans have null ...

public class FacebookOAuth implements Filter
{
@Autowired
private BusinessLogger logger;

@Autowired
private IUserSessionInfo userSessionInfo;

@Autowired
private FacebookOAuthHelper oAuthHelper;

public void init(FilterConfig fc) throws ServletException
{
    // Nothing to do
}

public void doFilter(ServletRequest sr, ServletResponse sr1, FilterChain fc) throws   IOException, ServletException
{
    // HttpServletRequest req = (HttpServletRequest)sr;
    HttpServletResponse res = (HttpServletResponse) sr1;

    String code = sr.getParameter("code");

    if (StringUtil.isNotBlankStr(code))
    {
        String authURL = this.oAuthHelper.getAuthURL(code);

this.oAuthHelper 等于 null(和其他依赖 bean)...

this.oAuthHelper is equal at null (and other dependancy beans to) ...

你能帮我吗?

事实上，我在服务器端 (Spring) 上没有使用 MVC 概念.对于我的侧客户端，我使用 Flex 技术和 BlazeDS servlet 与我的服务器进行通信.

In fact I don't use MVC notion on server side (Spring). For my side client I use Flex technology and BlazeDS servlet ton communicate with my server.

所以，这就是我使用过滤器 bean 概念的原因.

So, that is the reason, I use the Filter bean notion.

那么，如何在我的过滤器 bean 中处理我的会话 bean 概念?

So, how can I handle my session bean notion in my Filter bean ?

斯卡夫曼

我实现了你的想法，所以我更新了我的 application.xml :

I implemented your idea, so I update my application.xml with :

<bean id="FacebookOAuthHandler" class="com.xx.FacebookOAuthHandler" />
<bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
    <property name="mappings">
    <props>
       <prop key="/fbauth">FacebookOAuthHandler</prop>         
    </props>
   </property>
</bean>

和我的 FacebookOAuthHandler 类:

public class FacebookOAuthHandler extends AbstractController
{
@Autowired
private BusinessLogger logger;

@Autowired
private IUserSessionInfo userSessionInfo;

@Autowired
private FacebookOAuthHelper oAuthHelper;

@Override
protected ModelAndView handleRequestInternal(HttpServletRequest request,
        HttpServletResponse response) throws Exception {

    // TODO

    return null;
}

但是，当我的 URL 是:时，永远不会调用此方法 handleRequestInternalhttp://xx.xx.xx.xx/MyApp/fbauth

But, this method handleRequestInternal is never called when my URL is : http://xx.xx.xx.xx/MyApp/fbauth

推荐答案

我遇到了同样的问题，我的第一个想法是手动强制 Spring 将 @Autowired 注释应用到过滤器，就像这里建议的那样

I was facing the same problem and my first idea was to manually force Spring to apply @Autowired annotation to the filter like proposed here

http://forum.springsource.org/showthread.php?60983-Autowiring-the-servlet-filter

但我不喜欢在我的 Java 类中硬编码 bean 名称的想法.

But I don't like the idea of hardcoding the bean name in my Java class.

我找到了一种更简洁的方法:

I found an cleaner way that works as well:

public void init(FilterConfig filterConfig) throws ServletException {
    SpringBeanAutowiringSupport.processInjectionBasedOnServletContext(this,
            filterConfig.getServletContext());
}

这篇关于在 Filter bean 类中使用一些 bean?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！