Question

我使用JSF 2作为视图，使用Spring作为业务逻辑。我正在尝试使用注释（@Scope（“session”））将会话范围设置为我的一个春季bean，但我得到了这个例外：

    SEVERE: Context initialization failed
    org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'handleFiles': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private creazione.util.FTPOperations creazione.components.HandleOldFiles.operations; 
nested exception is org.springframework.beans.factory.BeanCreationException: 
Error creating bean with name 'ftpOperations': Scope 'session' is not active for the current thread; consider defining a scoped proxy for this bean if you intend to refer to it from a singleton; 
nested exception is java.lang.IllegalStateException: No thread-bound request found: Are you referring to request attributes outside of an actual web request, or processing a request outside of the originally receiving thread? 
If you are actually operating within a web request and still receive this message, your code is probably running outside of DispatcherServlet/DispatcherPortlet: In this case, use RequestContextListener or RequestContextFilter to expose the current request.

我知道RequestContextListener。它在我的web.xml中。我还添加了RequestContextFilter：

<listener>
        <listener-class>
            org.springframework.web.context.ContextLoaderListener
        </listener-class>
    </listener>
    <listener>
        <listener-class>
            org.springframework.web.context.request.RequestContextListener
        </listener-class>
    </listener>

    <filter>
        <filter-name>requestContextFilter</filter-name>
        <filter-class>org.springframework.web.filter.RequestContextFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>requestContextFilter</filter-name>
        <url-pattern>/*</url-pattern>
        <dispatcher>REQUEST</dispatcher>
        <dispatcher>INCLUDE</dispatcher>
        <dispatcher>FORWARD</dispatcher>
    </filter-mapping>

似乎没什么用。我究竟做错了什么？谢谢！

Answer 1

如果您使用的是基于注释的配置，只需在主配置xml中更改此标记：

<context:component-scan base-package="my.package"/>

到

<context:component-scan base-package="my.package" scoped-proxy="targetClass" />

还可以通过注释标记用于代理的类：

@Component
@Scope(value = "session", proxyMode = ScopedProxyMode.TARGET_CLASS)

这项工作对我而言。更多详情：4.12 Classpath scanning, managed components and writing configurations using Java

此外，如果你是通过上下文xml配置创建bean，这是另一个例子：

<bean id="somebean" class="com.package.beans" scope="session">
    <aop:scoped-proxy/>
</bean>

Answer 2

尝试使用aop：scoped-proxy定义必须作为会话注入的bean。

<bean id="ftpOperations" class="..." scope="session">
    <aop:scoped-proxy/>
</bean>

如果相关名称空间不存在，也添加它：

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:aop="http://www.springframework.org/schema/aop"
    ...
xsi:schemaLocation="
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
        ...

在Spring Beans中使用会话范围

2 个答案: