如何在Spring XML元数据配置中为bean设置ServletContext属性 [英] How to set ServletContext property for a bean in Spring XML metadata configuration

问题描述

我尝试在此处搜索SO，但找不到解决方案.我有一些类似下面的XML元数据.

I tried searching here on SO but i couldn't find a solution. I have some XML metadata like the following.

<bean class="javax.servlet.ServletContext" id="servletContext" />

<bean class="com.abc.ProductController">
    <property name="servletContext" ref="servletContext"/>
</bean>

使用这种配置，我得到一个例外，说"javax.servlet.ServletContext"是一个接口，它无法创建ID为servletContext的bean. ProductController类位于无法修改的某个jar中，但我希望将其作为应用程序中的bean.它具有自动关联的ServletContext属性.

With this configuration I am getting an exception saying that "javax.servlet.ServletContext" is an interface and it couldn't create a bean with the id servletContext. The ProductController class is in some jar which I can't modify but I want it as a bean in my application. It has ServletContext property autowired.

推荐答案

如果需要在XML配置spring应用程序中为ServletContext创建bean，则可以使用BeanFactory<ServletContext>实现ServletContextAware

If you need to create a bean for ServletContext in a XML config spring application, you could use a BeanFactory<ServletContext> implementing ServletContextAware

public class ServletContextFactory implements FactoryBean<ServletContext>,
            ServletContextAware{
    private ServletContext servletContext;

    @Override
    public ServletContext getObject() throws Exception {
        return servletContext;
    }

    @Override
    public Class<?> getObjectType() {
        return ServletContext.class;
    }

    @Override
    public boolean isSingleton() {
        return true;
    }

    @Override
    public void setServletContext(ServletContext servletContext) {
        this.servletContext = servletContext;
    }

}

然后您可以声明:

<bean class="org.app.ServletContextFactory" id="servletContext" />

<bean class="com.abc.ProductController">
    <property name="servletContext" ref="servletContext"/>
</bean>

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