WEB项目起动加载的实现方式整理

WEB项目启动加载的实现方式整理
方法一:
实现org.springframework.beans.factory.config.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spring配置文件中添加:

<bean class="***.***.InstantiationTracingBeanPostProcessor"/>

方法二:
实现org.springframework.beans.factory.InitializingBean接口:

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

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

在spring配置文件中添加:

<bean class="***.***.SysInitBean"/>

方法三:
实现javax.servlet.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>***.***.RedisInitListener</listener-class>  
</listener>