Spring启动后执行

方法一:

实现BeanPostProcessor接口:

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1. public class InstantiationTracingBeanPostProcessor implements BeanPostProcessor {  
2.     
3.     public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {    
4.         return bean;  
5.     }    
6.     
7.     public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {    
8.         return bean;    
9.     }    
10. }   

在配置文件中添加:

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1. <bean class="processor.InstantiationTracingBeanPostProcessor"/>  

方法二:

实现InitializingBean接口:

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1. public class SysInitBean implements InitializingBean, ServletContextAware {  
2.     public void afterPropertiesSet() throws Exception {  
3.     }  
4.   
5.     @Override  
6.     public void setServletContext(ServletContext servletContext) {  
7.     }  
8. }  

在配置文件中添加:

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1. <bean class="processor.SysInitBean"/>  

方法三:

实现ServletContextListener:

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1. public class RedisInitListener implements ServletContextListener {  
2.   
3.     @Override  
4.     public void contextDestroyed(ServletContextEvent sce) {  
5.   
6.     }  
7.   
8.     @Override  
9.     public void contextInitialized(ServletContextEvent sce) {  
10.         //WebApplicationContext wa = WebApplicationContextUtils.getWebApplicationContext(sce.getServletContext());  
11.         ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");         
12.     }  
13. }  

在web.xml中添加listener:

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1. <listener>  
2.     <listener-class>listener.RedisInitListener</listener-class>  
3. </listener>  

方法四：

在bean的默认构造方法里面初始化；