Question

的applicationContext.xml：

<bean id="defaultEntryPoint" class="com.spsetia.companyapp.company.services.CustomAuthenticationEntryPoint">
    <property name="securityConfiguration" ref="securityConfiguration" />
    <!-- Default filter chain proxy -->
    <property name="proxy" ref="_filterChainProxy" />
</bean>

的web.xml：

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/applicationContext.xml
    </param-value>
  </context-param>
 <filter>
    <filter-name>redirect</filter-name>
    <filter-class>org.apache.tapestry.RedirectFilter</filter-class>
  </filter>
 <filter-mapping>
    <filter-name>redirect</filter-name>
    <url-pattern>/</url-pattern>
  </filter-mapping>
 <listener>
    <listener-class>
      org.springframework.web.context.ContextLoaderListener
    </listener-class>
  </listener>
 <filter>
  <filter-name>_filterChainProxy</filter-name>
  <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>

<filter-mapping>
  <filter-name>_filterChainProxy</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
    <listener-class>org.springframework.security.ui.session.HttpSessionEventPublisher</listener-class>
</listener>
  <servlet>
    <servlet-name>app</servlet-name>
    <servlet-class>
      org.apache.tapestry.ApplicationServlet
    </servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>

但是我收到了这个错误：

org.springframework.beans.factory.BeanCreationException：使用名称创建bean时出错 '_filterChainList'：无法解析引用bean '_exceptionTranslationFilter'而用bean设置bean属性'filters' 关键[2];嵌套异常是 org.springframework.beans.factory.BeanCreationException：使用名称创建bean时出错 '_exceptionTranslationFilter'： bean的初始化失败;嵌套例外是 org.springframework.beans.factory.BeanCreationException：使用名称创建bean时出错 'defaultEntryPoint'定义于 ServletContext资源 [/WEB-INF/applicationContext.xml的]：无法解析对bean的引用设置bean时'_filterChainProxy' 财产'代理';嵌套异常是 org.springframework.beans.factory.BeanCreationException：使用名称创建bean时出错 '_filterChainProxy'：初始化豆子失败了;嵌套异常是显示java.lang.NullPointerException

我做错了什么？

Answer 1

看起来您必须使用SpringSecurity 2.0.x或2.5.x.类FilterChainProxyPostProcessor似乎不存在于3.0.x代码库中。

在挖掘了一下之后，我发现了你的异常似乎来自的代码：

public Object postProcessBeforeInitialization(Object bean, String beanName) 
throws BeansException {
    if(!BeanIds.FILTER_CHAIN_PROXY.equals(beanName)) {
        return bean;
    }

    FilterChainProxy filterChainProxy = (FilterChainProxy) bean;
    FilterChainList filterList = 
        (FilterChainList) beanFactory.getBean(BeanIds.FILTER_LIST);

    List filters = new ArrayList(filterList.getFilters());
    Collections.sort(filters, new OrderComparator());

我的诊断是NPE被抛出到创建ArrayList的行上，并且归因于filterList.getFilters()返回null。回过头来看，原因似乎是“_filterChainList”bean没有被正确初始化。

我不知道应该如何或在哪里初始化......

Answer 2

FilterChainList filterList = (FilterChainList) 
    beanFactory.getBean(BeanIds.FILTER_LIST);

List filters = new ArrayList(filterList.getFilters());

这些线是问题所在。这意味着名为_filterChainList的bean（上面常量的值）必须有一组为其定义的过滤器。

创建名为'_filterChainProxy'的bean时出错：bean的初始化失败;嵌套异常是java.lang.NullPointerException

2 个答案: