java.lang.ClassCastException: java.lang.Integer异常
出错代码:int user_id = Integer.parseInt((String) request.getAttribute("user_id"));
修改代码: int user_id =Integer.parseInt(request.getAttribute("user_id").toString());
出错代码:int user_id = Integer.parseInt((String) request.getAttribute("user_id"));
修改代码: int user_id =Integer.parseInt(request.getAttribute("user_id").toString());