将 Spring bean 注入 JSF ManagedBean 时出错

发布于 2024-12-10 21:16:10 字数 2565 浏览 0 评论 0原文

我有一个 JSF ManagedBean，它有一个应该由 Spring 设置的属性。但是，我收到以下错误：

Caused by: javax.el.ELException: java.lang.IllegalArgumentException: Cannot convert persistence.AuthDao@2f6e6ad9 of type class $Proxy166 to class persistence.AuthDao
at com.sun.el.ExpressionFactoryImpl.coerceToType(ExpressionFactoryImpl.java:68)
at com.sun.faces.el.ELUtils.coerce(ELUtils.java:536)
at com.sun.faces.mgbean.BeanBuilder$Expression.evaluate(BeanBuilder.java:592)
at com.sun.faces.mgbean.ManagedBeanBuilder$BakedBeanProperty.set(ManagedBeanBuilder.java:606)
... 57 more
Caused by: java.lang.IllegalArgumentException: Cannot convert persistence.AuthDao@2f6e6ad9 of type class $Proxy166 to class persistence.AuthDao
at com.sun.el.lang.ELSupport.coerceToType(ELSupport.java:397)
at com.sun.el.ExpressionFactoryImpl.coerceToType(ExpressionFactoryImpl.java:66)

我在 faces-config.xml 中有 ELresolver。

<managed-bean>
    <managed-bean-name>authController</managed-bean-name>
    <managed-bean-class>controllers.AuthController</managed-bean-class>
    <managed-bean-scope>session</managed-bean-scope>
    <managed-property>
        <property-name>authDao</property-name>
        <value>#{authDao}</value>
    </managed-property>
</managed-bean>

<application>
    <el-resolver>org.springframework.web.jsf.el.SpringBeanFacesELResolver</el-resolver>
</application>

看起来它可以找到该类，但该类是另一种类型（$Proxy166？，不确定它来自哪里）。

PS：删除 ELResolver 似乎可以解决问题；我认为在 faces-config.xml 中显式提供托管 bean 会覆盖 ELResolver。那么有没有办法让这两者共存呢？同样，如果我为一个 bean 同时提供注释和 XML 配置，那么首选哪一个，或者有没有办法合并它们，在注释中提供一些属性，在 XML 中提供一些属性？

PPS：添加接口并更改当前的类来实现它们后，我收到以下错误：

部署期间发生错误：加载应用程序时出现异常： java.lang.IllegalStateException：ContainerBase.addChild：开始： org.apache.catalina.LifecycleException： org.springframework.beans.factory.BeanCreationException：错误创建 ServletContext 资源中定义的名称为“authDao”的 bean [/WEB-INF/applicationContext.xml]：bean初始化失败；嵌套异常是 org.springframework.beans.ConversionNotSupportedException：失败转换 '$Proxy157 类型的属性值实现 persistence.UserDao，org.springframework.aop.SpringProxy，org.springframework.aop.framework.Advised' 属性“userDao”所需的类型“persistence.UserDaoImpl”；嵌套异常是 java.lang.IllegalStateException：无法转换类型 [$Proxy157 实现的值 persistence.UserDao，org.springframework.aop.SpringProxy，org.springframework.aop.framework.Advised] 属性“userDao”所需的类型 [persistence.UserDaoImpl]：否找到匹配的编辑器或转换策略。请参阅服务器日志了解更多详情。

原文

I have a JSF ManagedBean which has a property that should be set by Spring. However, I get the following error:

Caused by: javax.el.ELException: java.lang.IllegalArgumentException: Cannot convert persistence.AuthDao@2f6e6ad9 of type class $Proxy166 to class persistence.AuthDao
at com.sun.el.ExpressionFactoryImpl.coerceToType(ExpressionFactoryImpl.java:68)
at com.sun.faces.el.ELUtils.coerce(ELUtils.java:536)
at com.sun.faces.mgbean.BeanBuilder$Expression.evaluate(BeanBuilder.java:592)
at com.sun.faces.mgbean.ManagedBeanBuilder$BakedBeanProperty.set(ManagedBeanBuilder.java:606)
... 57 more
Caused by: java.lang.IllegalArgumentException: Cannot convert persistence.AuthDao@2f6e6ad9 of type class $Proxy166 to class persistence.AuthDao
at com.sun.el.lang.ELSupport.coerceToType(ELSupport.java:397)
at com.sun.el.ExpressionFactoryImpl.coerceToType(ExpressionFactoryImpl.java:66)

I have the ELresolver in faces-config.xml.

<managed-bean>
    <managed-bean-name>authController</managed-bean-name>
    <managed-bean-class>controllers.AuthController</managed-bean-class>
    <managed-bean-scope>session</managed-bean-scope>
    <managed-property>
        <property-name>authDao</property-name>
        <value>#{authDao}</value>
    </managed-property>
</managed-bean>

<application>
    <el-resolver>org.springframework.web.jsf.el.SpringBeanFacesELResolver</el-resolver>
</application>

It seems that it can find the class, but the class is of another type ($Proxy166?, not sure where that comes from).

PS: Removing the ELResolver seems to do the trick; I thought explicitly providing managed-bean in faces-config.xml would override ELResolver. Is there any way of both of these to coexist, then? Similarly, if I provide both annotation and XML configuration for a bean, which one of these is preferred, or is there a way to merge them, provide some properties in annotation, some in XML?

PPS: After adding interfaces and changing my current classes to implement them, I get the following error:

Error occurred during deployment: Exception while loading the app :
java.lang.IllegalStateException: ContainerBase.addChild: start:
org.apache.catalina.LifecycleException:
org.springframework.beans.factory.BeanCreationException: Error
creating bean with name 'authDao' defined in ServletContext resource
[/WEB-INF/applicationContext.xml]: Initialization of bean failed;
nested exception is
org.springframework.beans.ConversionNotSupportedException: Failed to
convert property value of type '$Proxy157 implementing
persistence.UserDao,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised'
to required type 'persistence.UserDaoImpl' for property 'userDao';
nested exception is java.lang.IllegalStateException: Cannot convert
value of type [$Proxy157 implementing
persistence.UserDao,org.springframework.aop.SpringProxy,org.springframework.aop.framework.Advised]
to required type [persistence.UserDaoImpl] for property 'userDao': no
matching editors or conversion strategy found. Please see server.log
for more details.