spring boot需要在view层使用公共属性，在其他项目中找到的源码：
- 把所有公共属性放在ServletContext中
- 实现ServletContextListener,ApplicationContextAware两个接口
- ApplicationContextAware用来获取spring工厂中的bean
- 每次数据更新调用方法，更新ServletContext中的数据
@Component("initSystem")
public class InitSystem implements ServletContextListener,ApplicationContextAware{
private static ApplicationContext applicationContext;
public static Map<Integer,ArcType> arcTypeMap=new HashMap<Integer,ArcType>();
/**
* 加载数据到application缓存中
* @param application
*/
public void loadData(ServletContext application){
ArcTypeService arcTypeService=(ArcTypeService) applicationContext.getBean("arcTypeService");
LinkService linkService=(LinkService) applicationContext.getBean("linkService");
List<ArcType> arcTypeList=arcTypeService.listAll(Sort.Direction.ASC, "sort");
application.setAttribute("allArcTypeList", arcTypeList); // 所有类别
for(ArcType arcType:arcTypeList){
arcTypeMap.put(arcType.getId(), arcType);
}
application.setAttribute("linkList", linkService.listAll(Sort.Direction.ASC,"sort")); // 所有友情链接
}
@Override
public void contextInitialized(ServletContextEvent sce) {
loadData(sce.getServletContext());
}
@Override
public void contextDestroyed(ServletContextEvent sce) {
// TODO Auto-generated method stub
}
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
// TODO Auto-generated method stub
this.applicationContext=applicationContext;
}
}
