关于将Spring bean注入jsf bean的问题 [英] A problem about injecting spring bean into jsf bean

问题描述

将spring bean注入jsf bean时遇到了一个问题， 这会导致javax.faces.FacesException(无法实例化类)， javax.faces.el.E​​valuationException

I met a problem when injecting spring bean into jsf bean, which causes javax.faces.FacesException(Can't instantiate class), javax.faces.el.EvaluationException

这是我的xml文件:

文件WEB-INF/components.xml定义了Spring bean

File WEB-INF/components.xml defines spring beans

<beans>
    <bean id="rambo.api.VideoService" 
    class="rambo.impl.VideoServiceImpl">

            <!-- some properties ... -->
    </bean>
</beans>

文件WEB-INF/faces-config.xml定义jsf bean

File WEB-INF/faces-config.xml define jsf beans

<managed-bean>
    <description>Video Home Bean</description>
    <managed-bean-name>videoBean</managed-bean-name>
    <managed-bean-class>rambo.tool.VideoBean</managed-bean-class>
    <managed-bean-scope>session</managed-bean-scope>

    <managed-property>
            <description>videoService</description>
            <property-name>videoService</property-name>
            <value>#{Components["rambo.api.VideoService"]}</value>
    </managed-property>
    <!-- Other properties -->
</managed-bean>

文件videoMain.jsp:

File videoMain.jsp:

在resourceToolExists中:videoBean使用videoService的某些方法

In resourceToolExists: the videoBean uses some methods of videoService

<h:panelGroup rendered="#{! videoBean.resourceToolExists" >
    <%@ include file="videoNoResource.jsp" %>
</h:panelGroup>

在这里得到: javax.faces.FacesException(无法实例化类rambo.impl.VideoServiceImpl)， javax.faces.el.E​​valuationException

Here gets: javax.faces.FacesException(Can't instantiate class rambo.impl.VideoServiceImpl), javax.faces.el.EvaluationException

推荐答案

您需要在faces-config.xml文件中配置spring elresolver. spring elresolver将评估您的el express并获取spring中定义的bean对象 请检查 http://static.springsource.org/spring/docs/2.5.x/api/org/springframework/web/jsf/el/SpringBeanFacesELResolver.html

You need to config a spring elresolver in you faces-config.xml file. The spring elresolver will evaluate your el express and acquire the bean object defined in spring Please check http://static.springsource.org/spring/docs/2.5.x/api/org/springframework/web/jsf/el/SpringBeanFacesELResolver.html

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