如何使用Spring和没有调用(例如context.getBean("foo-bar")
)将依赖项注入HttpSessionListener?
答案 0 :(得分:27)
由于Servlet 3.0 ServletContext有一个“addListener”方法,而不是在你的web.xml文件中添加你的监听器,你可以通过这样的代码添加:
@Component
public class MyHttpSessionListener implements javax.servlet.http.HttpSessionListener, ApplicationContextAware {
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
if (applicationContext instanceof WebApplicationContext) {
((WebApplicationContext) applicationContext).getServletContext().addListener(this);
} else {
//Either throw an exception or fail gracefully, up to you
throw new RuntimeException("Must be inside a web application context");
}
}
}
这意味着您可以正常注入“MyHttpSessionListener”,只需在应用程序上下文中存在bean就会导致监听器向容器注册
答案 1 :(得分:8)
您可以在Spring上下文中将HttpSessionListener
声明为bean,并在web.xml
中将委派代理注册为实际侦听器,如下所示:
public class DelegationListener implements HttpSessionListener {
public void sessionCreated(HttpSessionEvent se) {
ApplicationContext context =
WebApplicationContextUtils.getWebApplicationContext(
se.getSession().getServletContext()
);
HttpSessionListener target =
context.getBean("myListener", HttpSessionListener.class);
target.sessionCreated(se);
}
...
}
答案 2 :(得分:1)
使用Spring 4.0但也适用于3,我实现了下面详述的示例,听取ApplicationListener<InteractiveAuthenticationSuccessEvent>
并注入HttpSession
https://stackoverflow.com/a/19795352/2213375