通过调用getServletContext()方法从容器获得了ServletConext,然后创建了一个Map用于保存数据,再将这个Map放置到ServletContext中,在实际开发中,往往是把数据库中的数据放置到ServletContext里。
存储数据:
public void contextInitialized(ServletContextEvent sce) {
// TODO Auto-generated method stub
ServletContext servletContext = sce.getServletContext();
Map<String, String> countries = new HashMap<String,String>();
countries.put("ca", "canada");
countries.put("zn", "china");
servletContext.setAttribute("countries", countries);
}
// TODO Auto-generated method stub
ServletContext servletContext = sce.getServletContext();
Map<String, String> countries = new HashMap<String,String>();
countries.put("ca", "canada");
countries.put("zn", "china");
servletContext.setAttribute("countries", countries);
}
显示在页面:
<ul>
<c:forEach items="${countries }" var="country">
<li>${country.value }</li>
</c:forEach>
</ul>
此段是在监听器部分学习的,但是理论过程应该都是一样的,