第一種方法(繼承SessionAware類來取得session,然后用invalidate()方法清理)

public class ExitAction extends ActionSupport implements SessionAware{
@Override
public String execute() throws Exception {
HttpServletRequest request = ServletActionContext.getRequest();
HttpSession session1 = request.getSession();
session1.invalidate();
return super.execute();
}
public void setSession(Map arg0) {
}
}

//第二種方法(用ActionContext取session,然后用clear()方法清理)

public class ExitAction extends ActionSupport{
@Override
public String execute() throws Exception {
ActionContext ac = ActionContext.getContext();
Map session = ac.getSession();
session.remove("buser");
session.remove("guser");
session.remove("fuser");
return super.execute();
}
}