Struts2_API

 1 public String execute() throws Exception {
 2         //request域对象==》map (struts2并不推荐使用原生request域对象)
 3         //不推荐
 4         Map<String, Object> requestScope = (Map<String, Object>) ActionContext.getContext().get("request");
 5         //推荐
 6         ActionContext.getContext().put("name", "requestTom");
 7         //session域对象==》map
 8         Map<String, Object> sessionScope = ActionContext.getContext().getSession();
 9         sessionScope.put("name", "sessionTom");
10         //application域对象==》map
11         Map<String, Object> applicationScope = ActionContext.getContext().getApplication();
12         applicationScope.put("name", "applicationTom");
13         return SUCCESS;
14     }