方法一:

实现BeanPostProcessor接口:

 

public class InstantiationTracingBeanPostProcessor implements BeanPostProcessor {

    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        return bean;
    }

    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
        return bean;
    }
}

在配置文件中添加:

 

 

<bean class="processor.InstantiationTracingBeanPostProcessor"/>

 

方法二:

实现InitializingBean接口:

 

public class SysInitBean implements InitializingBean, ServletContextAware {
    public void afterPropertiesSet() throws Exception {
    }

    @Override
    public void setServletContext(ServletContext servletContext) {
    }
}

在配置文件中添加:

<bean class="processor.SysInitBean"/>

方法三:

实现ServletContextListener:

 

public class RedisInitListener implements ServletContextListener {

    @Override
    public void contextDestroyed(ServletContextEvent sce) {

    }

    @Override
    public void contextInitialized(ServletContextEvent sce) {
        //WebApplicationContext wa = WebApplicationContextUtils.getWebApplicationContext(sce.getServletContext());
        ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
    }
}

在web.xml中添加listener:

 

 

               <listener>              <listener-class>listener.RedisInitListener</listener-class>          </listener>
<listener>
    <listener-class>listener.RedisInitListener</listener-class>
</listener>