up_class_small.jsp

用JSP写的一个在线购物网站的代码

<%@ page contentType="text/html;charset=gb2312" import="java.sql.*" %>
<jsp:useBean id="data" scope="page" class="shop.data.conn" />
<%
String admin=(String)session.getValue("admin");
if(admin=="" || admin==null)
{%>
<script language="javascript">
alert("请登陆后再执行管理操作");
self.location="index.jsp";
</script>
<%}else{
String sql="select * from admin where admin='"+admin+"' and system='"+"1"+"'";
ResultSet rs=data.executeQuery(sql);
if(!rs.next())
{%>
<script language="javascript">
alert("对不起，您不是系统管理员不能进行相应操作");
history.back();
</script>
<%}else{
String bigid=request.getParameter("bigid");
String smallid=request.getParameter("smallid");
String name=request.getParameter("name");
byte[] tmp=name.getBytes("ISO8859_1");
name=new String(tmp);

sql="update class_small set name='"+name+"' where bigid='"+bigid+"' and smallid='"+smallid+"'";
rs=data.executeQuery(sql);
response.sendRedirect("class_small.jsp");
}}%>