程序运行数据量大速度慢,于是想做个loading页,配置了execAndWait这个拦截器之后,此Action下的所有方法都变成了空指针,请问为什么会这样,如何解决?具体如下:<action name="everydayStatisticsAction" class="everydayStatisticsAction">
<interceptor-ref name="execAndWait">
<param name="includeMethods">duanxin</param>
</interceptor-ref>
<result name="userStatistics">/statistics/everyday/userStatistic.jsp</result>
<result name="mapStatistics">/statistics/everyday/duanxinStatistic.jsp</result>
<result name="wait">/statistics/everyday/wait.jsp</result>
</action>wait.jsp中加入了<meta http-equiv="refresh" content="10;url=<s:url includeParams='all'/>" />Action中实现了接口SessionAware,如
protected Map<String, Object> session;
public void setSession(Map<String, Object> session) {
this.session = session;
}
大家快来帮帮我额,为什么会这样呢,咋解决额
<interceptor-ref name="execAndWait">
<param name="includeMethods">duanxin</param>
</interceptor-ref>
<result name="userStatistics">/statistics/everyday/userStatistic.jsp</result>
<result name="mapStatistics">/statistics/everyday/duanxinStatistic.jsp</result>
<result name="wait">/statistics/everyday/wait.jsp</result>
</action>wait.jsp中加入了<meta http-equiv="refresh" content="10;url=<s:url includeParams='all'/>" />Action中实现了接口SessionAware,如
protected Map<String, Object> session;
public void setSession(Map<String, Object> session) {
this.session = session;
}
大家快来帮帮我额,为什么会这样呢,咋解决额
到ActionContext.getContext().put(K, V);
这就空指针HttpServletRequest request.setAttribute也是空指针
2.需要request的地方用ServletContext context代替,如:context.setAttribute("listSms", listSms);
3.需要getParameter的地方可以用struts2 Action中对象与页面交互的特性,进行取值