通过ApplicationContextAware获取bean .

加载Spring配置文件时，如果Spring配置文件中所定义的Bean类实现了ApplicationContextAware 接口，那么在加载Spring配置文件时，会自动调用ApplicationContextAware 接口中的

public void setApplicationContext(ApplicationContext context) throws BeansException

方法，获得ApplicationContext对象。

前提必须在Spring配置文件中指定该类

public class ApplicationContextRegister implements ApplicationContextAware {

private Log log = LogFactory.getLog(getClass());

public void setApplicationContext(ApplicationContext applicationContext)
throws BeansException {
ContextUtils.setApplicationContext(applicationContext);
log.debug("ApplicationContext registed");
}

}

public class ContextUtils {

private static ApplicationContext applicationContext;

private static Log log = LogFactory.getLog(ContextUtils.class);

public static void setApplicationContext(ApplicationContext applicationContext) {
synchronized (ContextUtils.class) {
log.debug("setApplicationContext, notifyAll");
ContextUtils.applicationContext = applicationContext;
ContextUtils.class.notifyAll();
}
}

public static ApplicationContext getApplicationContext() {
synchronized (ContextUtils.class) {
while (applicationContext == null) {
try {
log.debug("getApplicationContext, wait...");
ContextUtils.class.wait(60000);
if (applicationContext == null) {
log.warn("Have been waiting for ApplicationContext to be set for 1 minute", new Exception());
}
} catch (InterruptedException ex) {
log.debug("getApplicationContext, wait interrupted");
}
}
return applicationContext;
}
}

public static Object getBean(String name) {
return getApplicationContext().getBean(name);
}

}

配置文件:<bean class="com.sinotrans.framework.core.support.ApplicationContextRegister" />

正常情况:

publicclassAppManagerextendsContextLoaderListenerimplementsServletContextListener{

privateServletContextcontext;
privateWebApplicationContextwebApplicationContext;

publicvoidcontextInitialized(ServletContextEventsce){
this.context=sce.getServletContext();
this.webApplicationContext=WebApplicationContextUtils.getRequiredWebApplicationContext(context);
this.context.setAttribute("WEBAPPLICATIONCONTEXT",webApplicationContext);｝

HttpSessionsession=request.getSession();
WebApplicationContextwebApplicationContext=(WebApplicationContext)session.getServletContext().getAttribute("WEBAPPLICATIONCONTEXT");
UnsubscribeEmailFacadeunsubscribeEmailFacade=(UnsubscribeEmailFacade)webApplicationContext.getBean("unsubscribeEmailFacade");