提问：为什么只能跳转到course页面？

补充 : String name=rs.getString("name"); String user_category=rs.getString("user_category"); String user_category_id=rs.getString("user_category_id"); String user_id=rs.getString("user_id"); session.setAttribute("user_id",user_id); session.setAttribute("user_category_id",user_category_id); session.setAttribute("user_category",user_category); session.setAttribute("name",name); } con.close(); if(session.getAttribute("user_category_id")=="0"){response.sendRedirect("news.jsp"); }else{response.sendRedirect("course.jsp"); }这是源码

网友回答：