Spring bean不会注入到JSF管理的bean(这是抽象超类)中

| 我有一个称为FooBean的抽象超类bean,而我所有的其他bean都扩展了该类。我已经将dao连接到applicationContext文件中,并且希望将其注入到此超类bean中,以便每次进入bean时都可以访问dao。问题是,每当我尝试访问子类中的dao时,都会收到NullPointerException。以下文件仅显示有关Spring设置的相关配置详细信息: web.xml:
<listener>
   <listener-class>
      org.springframework.web.context.ContextLoaderListener
   </listener-class>
</listener>
<listener>
   <listener-class>
      org.springframework.web.context.request.RequestContextListener
   </listener-class>
</listener>
<context-param>
   <description>Spring configuration files location.</description>
   <param-name>contextConfigLocation</param-name>
   <param-value>/WEB-INF/config/applicationContext-*.xml</param-value>
</context-param>
faces-config.xml:
<application>
   <variable-resolver>org.springframework.web.jsf.DelegatingVariableResolver</variable-resolver>
   <el-resolver>org.springframework.web.jsf.el.SpringBeanFacesELResolver</el-resolver>
...
</application>
FooBean.java:
public abstract class FooBean implements Serializable {
   protected transient FooService dao;

   public void setFooService(FooService dao){
      this.dao = dao;
   }
}
applicationContext-service.xml:
<bean id=\"serviceTemplate\" class=\"org.springframework.transaction.interceptor.TransactionProxyFactoryBean\" abstract=\"true\">
        <property name=\"transactionManager\" ref=\"transactionManager\"/>
        <property name=\"transactionAttributes\">
            <props>
                <prop key=\"*\"/>
                <!--
                <prop key=\"save*\">PROPAGATION_REQUIRED</prop>
                <prop key=\"delete*\">PROPAGATION_REQUIRED</prop>
                <prop key=\"remove*\">PROPAGATION_REQUIRED</prop>
                <prop key=\"find*\">PROPAGATION_REQUIRED,readOnly</prop>
                <prop key=\"get*\">PROPAGATION_REQUIRED,readOnly</prop>
                -->
            </props>
        </property>
    </bean>

    <!-- Definition of service targets -->
    <bean id=\"fooServiceTarget\" class=\"com.foo.service.FooService\">
        <property name=\"fooDAO\" ref=\"fooDAO\"/>
        <property name=\"adminDAO\" ref=\"adminDAO\"/>
        <property name=\"channelsDAO\" ref=\"channelsDAO\"/>
    </bean>
    <bean id=\"fooService\" parent=\"serviceTemplate\">
        <property name=\"target\" ref=\"fooServiceTarget\"/>
    </bean>
applicationContext-hibernate.xml:
<bean id=\"dataSource\" class=\"org.springframework.jndi.JndiObjectFactoryBean\">
        <property name=\"jndiName\" value=\"jdbc/FooDataSource\"/>
    </bean>

    <!-- Hibernate SessionFactory -->
    <bean id=\"sessionFactory\" class=\"org.springframework.orm.hibernate3.LocalSessionFactoryBean\">
        <property name=\"dataSource\" ref=\"dataSource\"/>
        <property name=\"mappingResources\">
            <list>
                <!--value>com/Foo/model/General.hbm.xml</value-->
            </list>
        </property>
        <property name=\"hibernateProperties\">
            <props>
                <prop key=\"hibernate.dialect\">org.hibernate.dialect.MySQLDialect</prop>
                <prop key=\"hibernate.show_sql\">true</prop>
                <prop key=\"hibernate.bytecode.use_reflection_optimizer\">true</prop>
                <prop key=\"hibernate.search.default.directory_provider\">filesystem</prop>
                <prop key=\"hibernate.search.default.indexBase\">/usr/lucene/indexes</prop>
                <!--prop key=\"hibernate.cache.provider_class\">org.hibernate.cache.SwarmCacheProvider</prop-->
            </props>
        </property>
    </bean>

    <!-- Transaction manager for a single Hibernate SessionFactory (alternative to JTA) -->
    <bean id=\"transactionManager\" class=\"org.springframework.orm.hibernate3.HibernateTransactionManager\">
        <property name=\"sessionFactory\" ref=\"sessionFactory\"/>
    </bean>

    <!-- Spring Data Access Exception Translator Defintion -->
    <bean id=\"jdbcExceptionTranslator\" class=\"org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator\"/>

    <bean id=\"hibernateTemplate\" class=\"org.springframework.orm.hibernate3.HibernateTemplate\">
        <property name=\"sessionFactory\" ref=\"sessionFactory\"/>
        <property name=\"jdbcExceptionTranslator\" ref=\"jdbcExceptionTranslator\"/>
    </bean>

    <!-- Add DAO\'s here and create separate application context for service -->
    <bean id=\"FooDAO\" class=\"com.foo.service.dao.impl.FooDAOHibernate\">
        <property name=\"hibernateTemplate\" ref=\"hibernateTemplate\"/>
    </bean>
    <bean id=\"adminDAO\" class=\"com.foo.service.dao.impl.AdminDAOHibernate\">
        <property name=\"hibernateTemplate\" ref=\"hibernateTemplate\"/>
    </bean>
    <bean id=\"channelsDAO\" class=\"com.foo.service.dao.impl.ChannelsDAOHibernate\">
        <property name=\"hibernateTemplate\" ref=\"hibernateTemplate\"/>
    </bean>
我已经尝试过但没有成功的事情: 在FooBean类字段上使用@ManagedProperty(value = \“#{FooService} \”)进行了尝试。 尝试在faces-config.xml中定义一个bean来注入spring bean:         com.foo.beans.FooBean         没有                      fooService             #{fooService}          将具有空指针的子类bean定义为spring bean,并通过spring bean xml文件注入属性。 具有讽刺意味的是,我能够将以下代码放入FooBean抽象类的构造函数中,并且注入了dao(但是我不想使用此代码,我想用spring来注入它):
WebApplicationContext ctx = WebApplicationContextUtils.getRequiredWebApplicationContext(getRequest().getServletContext());
        dao = (FooService)ctx.getBean(\"fooService\");
    
已邀请:
(我本来会以此为评论,但对此我没有足够的声誉) 如果使用@ManagedProperty,则还应该将其声明为@ManagedBean。 另外,我在任何applicationContext.xml文件中都没有看到FooBean,所以我看不到Spring如何“知道”它。     
相信这与使用jsf bean的方式有关。当请求新bean时,由于在部署时实例化了Spring Injects,因此不会注入dao。它在构造函数中起作用的原因是为请求创建了bean,然后您将获得应用程序上下文并获取dao Singleton。     

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