关于servelet,filter注入bean的问题

filter和servlet不受spring管理，所以不能依赖注入spring管理的bean,在servlet里的init 方法加入如下代码：

private XxxxService xxxxService;
WebApplicationContext wac = WebApplicationContextUtils.getRequiredWebApplicationContext(config.getServletContext());
xxxxService= (XxxxService) wac.getBean("xxxxService");

即可获得spring管理的bean.
filter代码如下：

wac = WebApplicationContextUtils.getRequiredWebApplicationContext(config.getServletContext());
xxxxService= (XxxxService) wac.getBean("xxxxService");

如果项目任何地方都想用获取到spring bean,可以用ApplicationContextAware来实现

  package bgi.genebook.vip.util;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

public class AppContextUtil implements ApplicationContextAware {
private static ApplicationContext context;

public void setApplicationContext(ApplicationContext applicationContext)
    throws BeansException {
context=applicationContext;
}

public static ApplicationContext getContext(){
    return context;
}
}