Question

An exception occurred processing JSP page /gallery.jsp at line 63

63行怎么会有异常，求帮助
60: if(session.getAttribute("name")!=null){
61: name=(String)session.getAttribute("name");}//鐢ㄦ埛鍚嶅瓧鐧诲綍锛屼紶阃�
62: if(request.getParameter("flag")!=null){
63: flag=Integer.parseInt(request.getParameter("flag"));
64: //浠巘estindex锛岀敤鎴锋槸鍚︾橱褰�
65: } System.out.println(name);%>
66: <div id="templamteo_body_wrapper">

Answer 1

如果flag的值为零长度的字符串，那么Integer.parseInt()将会抛出异常。