ssh下：系统初始化实现ServletContextListener接口时，获取spring中数据层对象无效的问题

 1 package com.lizhou.action;
 2 
 3 import java.util.List;
 4 
 5 import javax.servlet.ServletContext;
 6 import javax.servlet.ServletContextEvent;
 7 import javax.servlet.ServletContextListener;
 8 
 9 import org.springframework.beans.BeansException;
10 import org.springframework.context.ApplicationContext;
11 import org.springframework.context.ApplicationContextAware;
12 import org.springframework.stereotype.Component;
13 
14 import com.lizhou.entity.ProductBigType;
15 import com.lizhou.service.inter.ProductBigTypeServiceInter;
16 
17 /**
18  * 初始化:实现application缓存数据功能
19  * 在服务启动时，将数据库中的数据加载进内存
20  * @author bojiangzhou
21  *
22  */
23 @Component //这里要该注解，不然无法注入ApplicationContext对象
24 public class InitAction implements ServletContextListener, ApplicationContextAware {
25     
26     private ApplicationContext ac;
27     
28     @Override
29     public void contextInitialized(ServletContextEvent event) {
30         //这里输出当前调用该方法的对象
31         System.out.println("contextInitialized: "+this);
32         
33         //获取application
34         ServletContext application = event.getServletContext();
35         //获取服务层
36         ProductBigTypeServiceInter bigTypeService = (ProductBigTypeServiceInter) this.ac.getBean("bigTypeService");
37         //获取商品大类集合
38         List<ProductBigType> bigTypeList = bigTypeService.findAllBigTypeList();
39         //保存到application缓存中
40         application.setAttribute("bigTypeList", bigTypeList);
41     }
42     
43     @Override
44     public void setApplicationContext(ApplicationContext ac) throws BeansException {
45         //这里输出当前调用该方法的对象
46         System.out.println("setApplicationContext: "+this);
47         this.ac = ac;
48     }
49     
50     @Override
51     public void contextDestroyed(ServletContextEvent event) {
52     }
53 
54 }

 1 <!-- 添加对spring的支持 -->
 2   <context-param>
 3       <param-name>contextConfigLocation</param-name>
 4       <param-value>classpath:applicationContext.xml</param-value>
 5   </context-param>
 6   
 7   <!-- 定义spring的监听器，加载spring -->
 8   <listener>
 9       <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
10   </listener>
11   
12   <!-- 添加自己的初始化action -->
13   <listener>
14       <listener-class>com.lizhou.action.InitAction</listener-class>
15   </listener>