论坛统计在线人数

1  登录的action中 ，如果登录成功：

Integer c = (Integer) ActionContext.getContext().getApplication().get("userCount");
	if(c== null){
		ActionContext.getContext().getApplication().put("userCount", 1);
	}else{
	<span style="white-space:pre">	</span>ActionContext.getContext().getApplication().put("userCount", c+1);

	}

2.登录后的界面添加:

	<%
	Integer userCount= (Integer)application.getAttribute("userCount");%>
	<div>在线人数：<%=userCount %></div>

3.用户推出登录时：

AppAccount  acc = (AppAccount) getRequest().getSession().getAttribute("curr_user");
		if(acc!=null){
			getRequest().getSession().removeAttribute("curr_user");
			Integer cou = (Integer) ActionContext.getContext().getApplication().get("userCount");
			 ActionContext.getContext().getApplication().put("userCount",new Integer(cou-1));
		}